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2003-2019 Cadillac CTS Problems: 14 Known Issues

2003-2019 model years · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2003-2019 Cadillac CTS has 14 documented known issues, with 7 rated critical. The most serious are Heated Washer Fluid System Fire Hazard (Recall 10V240000), Electric Power-Steering Assist May Fail (Recall 25V175), Rear-Axle Pinion Seal Can Leak and Allow Differential Failure (Recall 07V589), Ignition Key Can Move Out of Run and Disable Airbags (Recall 14V394), Brake-Pedal Pushrod Bracket May Fracture (Recall 15V358), Chassis Electronic Module Can Short and Stall the Engine (Recall 14V614) and 3.6L LLT Direct-Injection Timing Chain Stretch Sets Cam-Correlation Codes ($1,800-$3,500 repair). Across all issues with published estimates, repair costs range from $150 to $3,500. DIY maintenance guides at au7o.io.

In This Article

  • CTS Electrical5
  • CTS Engine3
  • CTS Steering1
  • CTS Drivetrain1
  • CTS Brakes1
  • CTS Interior1
  • CTS Transmission1
  • CTS Cooling1
  • Recalls5
  • FAQ
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In This Article

  • Electrical5
  • Engine3
  • Steering1
  • Drivetrain1
  • Brakes1
  • Interior1
  • Transmission1
  • Cooling1
  • Recalls5
  • FAQ

All 14 Known Issues

NHTSA Recalls5 recalls

STEERING:ELECTRIC POWER ASSIST SYSTEM

General Motors LLC (GM) is recalling certain 2016-2018 Cadillac CTS, and 2017 Cadillac ATS, Chevrolet Camaro, and Chevrolet Corvette vehicles. The electric power steering (EPS) assist system may fail.

Campaign #19V08600007/02/2019

STEERING:ELECTRIC POWER ASSIST SYSTEM

General Motors LLC (GM) is recalling certain 2016-2018 Cadillac CTS, 2017-2018 Cadillac ATS, Chevrolet Camaro, and Chevrolet Corvette vehicles. The electric power steering (EPS) assist may fail.

Campaign #25V17500020/03/2025

SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER

General Motors LLC (GM) is recalling certain 2014-2016 Cadillac CTS vehicles, equipped with heated front seats. The flexible heating mats in the front seats may be damaged over time, resulting in the seat heaters producing excessive heat.

Campaign #18V59500007/09/2018
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Frequently Asked Questions

What are the most common Cadillac CTS problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2003-2019 Cadillac CTS has 14 documented issues. The most frequently reported are: Heated Washer Fluid System Fire Hazard (Recall 10V240000), Electric Power-Steering Assist May Fail (Recall 25V175), Rear-Axle Pinion Seal Can Leak and Allow Differential Failure (Recall 07V589). Of these, 7 are rated critical and should be addressed promptly.

Is the Cadillac CTS reliable?

The 2003-2019 Cadillac CTS has 14 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 7 issues are rated critical: Heated Washer Fluid System Fire Hazard (Recall 10V240000) and Electric Power-Steering Assist May Fail (Recall 25V175) and Rear-Axle Pinion Seal Can Leak and Allow Differential Failure (Recall 07V589) and Ignition Key Can Move Out of Run and Disable Airbags (Recall 14V394) and Brake-Pedal Pushrod Bracket May Fracture (Recall 15V358) and Chassis Electronic Module Can Short and Stall the Engine (Recall 14V614) and 3.6L LLT Direct-Injection Timing Chain Stretch Sets Cam-Correlation Codes. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Cadillac CTS problems?

Repair costs for known Cadillac CTS issues range from $150 to $3,500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What year Cadillac CTS is the most reliable?

Reliability varies across model years of the Cadillac CTS. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 2003-2019 Cadillac CTS with 14 documented issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.

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ALL YEARS20192018201720162015201420132012201120102009200820072006200520042003

The 2008 and 2009 Cadillac CTS is included in NHTSA recall 10V240000 when it was built with the heated washer fluid system (HWFS). The defect is an electrical short in the heated washer module's printed circuit board. GM ran a 2008 recall that added a fuse to the control circuit harness to limit what that short could do, but reports of thermal incidents continued on modules that had already been through that repair. NHTSA states that the heated washer module may ignite and a fire may occur. Note the narrower year range here than for GM's trucks — only the 2008 and 2009 CTS are listed.

Common Symptoms

  • Burning smell or smoke from under the hood
  • Fire at the heated washer fluid module

How to Fix

There is no cost to the owner. A Cadillac dealer permanently disables and removes the heated washer fluid module from the car, then provides and inserts a revised owner manual page recording that the feature has been permanently disabled and removed. The safety recall began June 11, 2010. Do not treat the earlier 2008 fuse-harness repair as a substitute. To confirm whether your CTS still has this campaign open, enter the VIN at nhtsa.gov/recalls or call Cadillac at 1-866-982-2339.

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On certain 2003-2014 Cadillac CTS vehicles, key-ring weight, road conditions or another jarring event can move the ignition switch out of Run, turn off the engine and prevent airbag deployment in a crash.

Common Symptoms

  • Open safety recall
  • Ignition key may move out of Run

How to Fix

Until repaired, remove all other items from the key ring. Check the VIN and recall history; Cadillac dealers install the specified key-ring and key-slot or key-head remedy under recall 14V394.

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NHTSA Verified
High ConfidenceVerifiedReviewed Jul 2026

On certain 2013-2014 Cadillac CTS vehicles, internal contamination in the chassis electronic module can cause an electrical short and stall the engine.

Common Symptoms

  • Open safety recall
  • Unexpected engine stall

How to Fix

Check the VIN and campaign history. Cadillac dealers replace the chassis electronic module under recall 14V614 / GM 14515.

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NHTSA Verified
High ConfidenceVerifiedReviewed Jul 2026

The front doors of the 2008-2014 CTS do not use a mechanical cable to the latch. Pulling the outside handle closes an electronic micro-switch in the handle base, which commands the latch actuator to release. When the micro-switch or its connector corrodes or wears out, the doors will still unlock with the fob but the door will not open from outside - owners report having to reach in from the other door or through a window. Failures often cascade: multiple owners on Cadillac Owners Forum report a second and third handle failing within weeks of the first. The failure is usually diagnosed incorrectly as a bad lock actuator, which is a much more expensive part.

Common Symptoms

  • Door will not open when the outside handle is pulled
  • Doors unlock normally with the key fob but stay latched
  • Handle feels loose or the pull does nothing
  • Intermittent operation that worsens in cold or wet weather

How to Fix

Confirm the diagnosis before buying parts: disconnect the handle connector and jumper the switch circuit at the harness - if the latch fires, the handle switch is at fault and the actuator is fine. The durable repair is a new GM OEM handle base assembly containing the switch contacts; owners who replaced only the actuator report the fault returning. Some owners successfully replace just the micro-switches inside the handle base for a fraction of the cost. There is no recall covering this.

Typical repair cost:$150 - $500

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

CTS models fitted with high-intensity discharge headlamps use a separate ballast/igniter module mounted low in the headlamp housing. The housing takes on water - through a failed seal, a cracked lens or a missing bulb cap - and the water pools directly on the ballast, corroding it. The result is one headlamp that flickers, cycles on and off, or goes out entirely, which owners almost always misdiagnose as a burned-out HID bulb. On cars with the adaptive (swiveling) headlamp option, the same water intrusion also attacks the horizontal-aim motor and its control circuit, setting adaptive-headlamp codes. Replacement requires bumper cover removal on the CTS, which is what makes the job expensive.

Common Symptoms

  • One headlamp flickers or cycles on and off
  • One HID headlamp completely dark while the other works
  • Headlamp works when cold then quits when warm
  • Moisture or standing water visible inside the headlamp housing
  • Adaptive headlamp warning or B1461/B1462 codes

How to Fix

Swap the suspect bulb into the good side first - if the fault follows the housing rather than the bulb, the ballast is the culprit. Before installing a new ballast, find and fix the water source: reseal the lens, replace missing or cracked bulb access caps, and confirm the housing drains. The OEM ballast is plug-and-play and needs no programming, so a good used GM unit is a common cost-saving route. If adaptive-headlamp codes are present, inspect the leveling/aim motor for the same corrosion.

Typical repair cost:$200 - $900

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Community Reported
Medium ConfidenceVerifiedReviewed Aug 2026

The 3.6L LLT direct-injection V6 used in the 2008-2011 CTS (and the 2007 gen-1 3.6L LY7) is among the best-documented GM V6 failures: the primary and secondary timing chains elongate well before 100,000 miles, throwing off intake/exhaust cam correlation. Chain wear is strongly accelerated by extended oil-change intervals and low oil level, which starve the hydraulic chain tensioners. GM acknowledged the defect with Special Coverage bulletin 11340 (revisions A/B/C) extending timing-chain coverage to 10 years / 120,000 miles on affected models including the 2007-2009 CTS, and with service bulletin 12-06-01-009F describing the updated chain/tensioner/guide kit. This is an LLT/LY7 direct-injection-era issue and should not be attributed to the later LFX or to the 2.0L LTG four.

This issue also affects: Buick Cascada, Buick Enclave, Buick Encore

Common Symptoms

  • Rattle or chirp from the front of the engine on cold start
  • Check engine light with camshaft position correlation codes
  • Rough idle and hesitation under load
  • Reduced fuel economy
  • Engine may crank but not start in advanced cases

How to Fix

Confirm with a scan tool that cam-correlation codes (P0008/P0009/P0016/P0017) are present and check for a rattle on cold start. The repair is the full updated GM timing-chain kit - all three chains, tensioners, guides, and usually the cam actuators - not just the stretched chain. Verify eligibility for GM Special Coverage 11340C (10yr/120k) at a Cadillac dealer before paying out of pocket; many owners had this done free. Afterward, run 5,000-mile oil changes with dexos-spec oil and check level monthly, since tensioner health depends entirely on oil condition.

Typical repair cost:$1,800 - $3,500

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High ConfidenceVerifiedReviewed Aug 2026

The 2.0L LTG turbocharged four in the third-generation CTS is direct-injected, so no fuel ever washes across the back of the intake valves. Oil vapor drawn in through the PCV system bakes onto the valve stems and seats and builds a hard carbon crust that chokes airflow. The result appears gradually as a rough or lumpy cold idle, a stumble under light throttle, misfire codes and a measurable loss of power and fuel economy - typically becoming noticeable somewhere past 60,000-80,000 miles, sooner on cars driven in short trips. Owners on Cadillac Owners Forum also report oil pooling in the intake plenum at the PCV connection, which accelerates the deposit rate. This is a direct-injection design characteristic, not a defect covered by any recall, and it is specific to the DI engines - it should not be conflated with the V6 timing chain story.

This issue also affects: Buick LeSabre, Buick Park Avenue, Buick Cascada

Common Symptoms

  • Rough or shaky idle, worst when cold
  • Hesitation or stumble under light acceleration
  • Misfire codes on one or more cylinders
  • Noticeable drop in fuel economy and power
  • Oil found in the intake plenum near the PCV connection

How to Fix

Confirm with a borescope through an injector or intake port before spending money - carbon deposits are visible directly. The effective cleaning method is mechanical walnut-shell blasting of the intake ports with the manifold removed; chemical intake cleaners and fuel additives do not reach the valve backs on a DI engine. Inspect the PCV system and clean any oil accumulation in the plenum at the same time, and consider an oil catch can to slow re-accumulation. Plan on repeating the service roughly every 60,000-80,000 miles.

Typical repair cost:$400 - $1,000

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Medium ConfidenceVerifiedReviewed Aug 2026

The 3.6L V6 pulls crankcase vapor through a fixed-orifice PCV passage integrated into the valve cover rather than a serviceable PCV valve. The orifice sludges up and the baffle behind it does a poor job of separating oil from the vapor stream, so liquid oil is drawn into the intake and burned. Owners across the first- and second-generation 3.6L cars report consumption in the range of a quart every 1,500-2,500 miles with no external leak and no smoke visible from the driver's seat. GM addressed it partially with a redesigned driver's-side valve cover carrying an improved baffle, and later revised the PCV orifice size on the LLT around the 2013-2014 timeframe. Because there is no drip, this gets missed until the low-oil light comes on - and on this engine, low oil is exactly what kills the timing chain tensioners.

This issue also affects: Chevrolet Traverse, Chevrolet Camaro

Common Symptoms

  • Oil level drops a quart every 1,500-2,500 miles with no visible leak
  • Low oil level warning between changes
  • Oil residue in the intake tubing or throttle body
  • Fouled spark plugs
  • Faint blue smoke on hard acceleration or after long idling

How to Fix

Run a documented oil consumption test over 1,000-2,000 miles before anything else, and rule out the far more common valve cover gasket and rear main leaks. The GM repair is replacement of the valve cover with the updated baffled part and gasket, which brings many cars back within specification. Owners who want to go further fit an oil catch can between the PCV outlet and the intake to keep oil out of the intake tract. Whatever route you take, check the dipstick at every fuel stop, because on the 3.6L an oil-consumption problem quietly becomes a timing-chain problem.

Typical repair cost:$250 - $800

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Medium ConfidenceVerifiedReviewed Aug 2026

On certain 2016-2018 Cadillac CTS vehicles, electric power-steering assist may fail and require greater steering effort, especially at low speeds.

Common Symptoms

  • Open safety recall
  • Sudden loss of power-steering assist

How to Fix

Check the VIN and recall status. Cadillac dealers replace the power-steering gear assembly under recall 25V175 / GM N252497020.

Find a Cadillac dealer

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High ConfidenceVerifiedReviewed Jul 2026

On certain 2005-2007 Cadillac CTS vehicles, a rear-axle pinion seal may leak fluid. Continued fluid loss can lead to rear-differential failure, loss of motive power or loss of control.

Common Symptoms

  • Open safety recall
  • Rear-axle fluid leak

How to Fix

Check the VIN and recall completion history. Cadillac dealers replace the rear-axle pinion seal under recall 07V589.

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On certain 2015 Cadillac CTS vehicles, the bracket between the brake-pedal assembly and the brake-actuating rod may fracture during normal pedal operation, preventing the driver from applying the brakes.

Common Symptoms

  • Open safety recall
  • Brake-pedal linkage failure risk

How to Fix

Check the VIN and recall completion history. Cadillac dealers inspect the bracket and replace affected brackets under recall 15V358.

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The Cadillac User Experience (CUE) capacitive touchscreen fitted to CTS models from 2013 onward suffers separation of the bonded layers behind the glass. The screen develops a spiderweb of hairline cracks radiating from the edges, then stops responding to touch or begins registering phantom presses that change radio stations and climate settings on their own. Because CUE controls climate, audio and phone with no redundant hard buttons, a failed screen disables a large part of the car's controls. GM issued its first dealer bulletin on delamination in December 2014 and multiple preliminary information bulletins followed (PIC6055 and revisions). GM never issued a recall or a reimbursement campaign, and a class-action lawsuit over the defective screens was filed in 2019.

Common Symptoms

  • Hairline cracks spidering out from the edges of the touchscreen
  • Screen does not respond to touch in some areas
  • Phantom or ghost touches changing settings by themselves
  • Bubbling or separation visible under the glass
  • Climate and audio controls unusable

How to Fix

Dealers will normally replace the CUE display under the 4yr/50k bumper-to-bumper warranty when the delamination is visible, so check warranty status first. Out of warranty, a new GM display assembly is the most expensive route; several specialist rebuilders sell a replacement touch-panel/display service for a fraction of dealer cost, and the unit is removable by the owner. Replacing the screen with an updated panel resolves the phantom-touch behavior; software resets do not.

Typical repair cost:$300 - $1,500

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High ConfidenceVerifiedReviewed Aug 2026

Third-generation CTS models with the 8L45 (2.0T and some 3.6L) or 8L90 eight-speed automatic develop a pronounced shudder or vibration at steady cruising speeds, typically between 25 and 80 mph, when the torque converter clutch is partially applied. GM determined the root cause was the original factory-fill automatic transmission fluid, which is hygroscopic; absorbed moisture changes the fluid's friction characteristics, glazes the TCC friction material and produces a slip-stick judder that owners describe as driving over rumble strips. GM addressed it with service bulletin 18-NA-355, which covers 8L45 and 8L90 transmissions in 2016-2019 CTS among other models. Drivers often mistake it for an engine misfire or an out-of-balance driveshaft.

Common Symptoms

  • Shudder or vibration at steady cruise between roughly 25 and 80 mph
  • Feels like driving over rumble strips
  • Vibration disappears when you accelerate or lift off
  • Worse when the transmission is warm
  • No check engine light in most cases

How to Fix

The bulletin remedy is a complete transmission fluid exchange - not a drain-and-fill and not an immediate torque converter replacement - using the reformulated Mobil 1 Synthetic LV ATF HP (blue label) fluid, performed with GM's cooler-flush and exchange equipment. Two flushes are sometimes needed. If shudder persists after a correct fluid exchange, the torque converter itself is replaced. Expect roughly $400-$1,000 for the fluid service at a dealer; owners on the forums report figures near the top of that range.

Typical repair cost:$400 - $1,000

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High ConfidenceVerifiedReviewed Aug 2026

The engine-driven water pump on the 3.6L V6 (LY7, LLT and LFX) develops a weep at the shaft seal. What makes this failure hard to catch is that many CTS pumps leak only when the system is hot and fully pressurized; the orange-pink DEX-COOL evaporates off the hot block and leaves little more than a crusty residue, so a cold inspection at the dealer finds nothing. Owners on Cadillac Owners Forum describe chasing a slowly dropping coolant level for months with repeated 'no leak found' visits. Left alone the pump eventually fails outright, and on an aluminum-head V6 that means overheating and possible head gasket or head damage. Note the LLT also has a small auxiliary electric coolant pump, which is a different part and a different failure.

This issue also affects: Buick Encore GX, Cadillac Allante, Cadillac Catera

Common Symptoms

  • Slowly dropping coolant level with no visible puddle
  • Sweet coolant smell after driving
  • Orange or pink crusty residue near the front of the engine
  • Temperature gauge climbing in traffic
  • Overheating warning in advanced cases

How to Fix

Pressure-test the cooling system cold and again after a full warm-up, or use a UV dye and inspect after several heat cycles - a single cold inspection will miss this leak. Inspect the weep hole under the pump for dried coolant crust. The fix is a new water pump and gasket, and it is good practice to replace the thermostat and the pressure cap at the same time and refill with the correct DEX-COOL. Do not top off and keep driving; a seized pump on the 3.6L can cost a head gasket.

Typical repair cost:$400 - $900

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Medium ConfidenceVerifiedReviewed Aug 2026

AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE

General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalade ESV, XTS, 2015-2016 Cadillac ATS, CTS, and SRX vehicles. The front-driver air bag inflator may rupture during deployment.

Campaign #26V32900021/05/2026

SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES

General Motors LLC (GM) is recalling certain model year 2015 Cadillac ATS and CTS vehicles. The affected vehicles have a bracket between the brake pedal assembly and the rod that actuates the brakes that may fracture during normal brake pedal operation.

Campaign #15V35800009/06/2015

Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.

get a full repair guide

What is the 2008-2009 Cadillac CTS Heated Washer Fluid System Fire Hazard (Recall 10V240000)?

The 2008 and 2009 Cadillac CTS is included in NHTSA recall 10V240000 when it was built with the heated washer fluid system (HWFS). The defect is an electrical short in the heated washer module's printed circuit board. GM ran a 2008 recall that added a fuse to the control circuit… Severity: high.

What is the 2016-2018 Cadillac CTS Electric Power-Steering Assist May Fail (Recall 25V175)?

On certain 2016-2018 Cadillac CTS vehicles, electric power-steering assist may fail and require greater steering effort, especially at low speeds. Severity: high.

What is the 2005-2007 Cadillac CTS Rear-Axle Pinion Seal Can Leak and Allow Differential Failure (Recall 07V589)?

On certain 2005-2007 Cadillac CTS vehicles, a rear-axle pinion seal may leak fluid. Continued fluid loss can lead to rear-differential failure, loss of motive power or loss of control. Severity: high.

What is the 2003-2014 Cadillac CTS Ignition Key Can Move Out of Run and Disable Airbags (Recall 14V394)?

On certain 2003-2014 Cadillac CTS vehicles, key-ring weight, road conditions or another jarring event can move the ignition switch out of Run, turn off the engine and prevent airbag deployment in a crash. Severity: high.

What is the 2015 Cadillac CTS Brake-Pedal Pushrod Bracket May Fracture (Recall 15V358)?

On certain 2015 Cadillac CTS vehicles, the bracket between the brake-pedal assembly and the brake-actuating rod may fracture during normal pedal operation, preventing the driver from applying the brakes. Severity: high.

What is the 2013-2014 Cadillac CTS Chassis Electronic Module Can Short and Stall the Engine (Recall 14V614)?

On certain 2013-2014 Cadillac CTS vehicles, internal contamination in the chassis electronic module can cause an electrical short and stall the engine. Severity: high.

What is the 2007-2011 Cadillac CTS 3.6L LLT Direct-Injection Timing Chain Stretch Sets Cam-Correlation Codes?

The 3.6L LLT direct-injection V6 used in the 2008-2011 CTS (and the 2007 gen-1 3.6L LY7) is among the best-documented GM V6 failures: the primary and secondary timing chains elongate well before 100,000 miles, throwing off intake/exhaust cam correlation. Chain wear is strongly ac… Repairs typically run $1,800-$3,500. Severity: high.

What is the 2014-2019 Cadillac CTS Carbon Buildup on Intake Valves of the 2.0L LTG Turbo (Direct Injection)?

The 2.0L LTG turbocharged four in the third-generation CTS is direct-injected, so no fuel ever washes across the back of the intake valves. Oil vapor drawn in through the PCV system bakes onto the valve stems and seats and builds a hard carbon crust that chokes airflow. The resul… Repairs typically run $400-$1,000. Severity: medium.

What is the 2014-2019 Cadillac CTS CUE Touchscreen Delaminates and Becomes Unresponsive or 'Ghost Touches'?

The Cadillac User Experience (CUE) capacitive touchscreen fitted to CTS models from 2013 onward suffers separation of the bonded layers behind the glass. The screen develops a spiderweb of hairline cracks radiating from the edges, then stops responding to touch or begins register… Repairs typically run $300-$1,500. Severity: medium.

What is the 2008-2014 Cadillac CTS Electronic Door-Handle Micro-Switch Fails and the Door Will Not Open from Outside?

The front doors of the 2008-2014 CTS do not use a mechanical cable to the latch. Pulling the outside handle closes an electronic micro-switch in the handle base, which commands the latch actuator to release. When the micro-switch or its connector corrodes or wears out, the doors… Repairs typically run $150-$500. Severity: medium.

What is the 2016-2019 Cadillac CTS 8L45 / 8L90 Eight-Speed Torque Converter Clutch Shudder at Cruise?

Third-generation CTS models with the 8L45 (2.0T and some 3.6L) or 8L90 eight-speed automatic develop a pronounced shudder or vibration at steady cruising speeds, typically between 25 and 80 mph, when the torque converter clutch is partially applied. GM determined the root cause w… Repairs typically run $400-$1,000. Severity: medium.

What is the 2004-2012 Cadillac CTS 3.6L V6 Oil Consumption Driven by a Restrictive PCV Orifice in the Valve Cover?

The 3.6L V6 pulls crankcase vapor through a fixed-orifice PCV passage integrated into the valve cover rather than a serviceable PCV valve. The orifice sludges up and the baffle behind it does a poor job of separating oil from the vapor stream, so liquid oil is drawn into the inta… Repairs typically run $250-$800. Severity: medium.

What is the 2004-2014 Cadillac CTS 3.6L V6 Water Pump Seal Leaks Intermittently and Only Under Pressure?

The engine-driven water pump on the 3.6L V6 (LY7, LLT and LFX) develops a weep at the shaft seal. What makes this failure hard to catch is that many CTS pumps leak only when the system is hot and fully pressurized; the orange-pink DEX-COOL evaporates off the hot block and leaves… Repairs typically run $400-$900. Severity: medium.

What is the 2008-2015 Cadillac CTS HID Headlamp Ballast Corrodes from Water Intrusion and the Light Goes Out?

CTS models fitted with high-intensity discharge headlamps use a separate ballast/igniter module mounted low in the headlamp housing. The housing takes on water - through a failed seal, a cracked lens or a missing bulb cap - and the water pools directly on the ballast, corroding i… Repairs typically run $200-$900. Severity: medium.