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Buick · Known Issues

2005-2017 Buick LaCrosse Problems: 11 Known Issues

2005-2017 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 2005-2017 Buick LaCrosse has 11 documented known issues, with 9 rated critical. The most serious are Electronic Power Steering Connector Corrosion / Loss of Assist (Recall 17V116000), Headlamp Driver Module Overheats and Kills Headlights (Recall 15V519000), Ignition Switch Can Rotate Out of Run With a Loaded Key Ring (Recall 14V355000), 3.8L V6 Lower Intake Manifold Gasket / Plastic Coolant Elbow Leaks ($300-$900 repair), eAssist 12V Battery Drain and "Service Battery Charging System" Warnings ($500-$2,500 repair), Intermittent Low-Beam Headlight Failure, Rear Suspension Toe-Link May Loosen / Fracture (Recalls 17V267000 & later), 3.6L V6 Timing Chain Stretch and Wear ($1,500-$3,000 repair) and LaCrosse 3.6L LLT/LFX Timing Chain Stretch ($2,000-$4,500 repair). Across all issues with published estimates, repair costs range from $150 to $4,500. DIY maintenance guides at au7o.io.

In This Article

  • LaCrosse Electrical5
  • LaCrosse Engine2
  • LaCrosse Steering1
  • LaCrosse Cooling1
  • LaCrosse Suspension1
  • LaCrosse HVAC1
  • Recalls13
  • FAQ
Get Started
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In This Article

  • Electrical5
  • Engine2
  • Steering1
  • Cooling1
  • Suspension1
  • HVAC1
  • Recalls13
  • FAQ

All 11 Known Issues

NHTSA Recalls13 recalls

STEERING:ELECTRIC POWER ASSIST SYSTEM

General Motors LLC (GM) is recalling certain 2017 Buick LaCrosse vehicles. The electrical connectors for the Electronic Power Steering (EPS) system may not be properly sealed. As a result, water may enter and corrode the connectors possibly resulting in a loss of power steering.

Campaign #17V11600023/02/2017

SUSPENSION:REAR

General Motors LLC (C) is recalling certain 2017 Buick LaCrosse vehicles. The rear suspension toe-links may have been incorrectly installed, and, as a result, they may loosen and disconnect from the rear suspension system.

Campaign #17V26700021/04/2017

AIR BAGS:FRONTAL

General Motors LLC (GM) is recalling certain model year 2014-2016 Buick Lacrosse and Chevrolet Spark EV, Caprice PPV and SS vehicles, 2014-2017 Buick Encore and Chevrolet Corvette, Silverado 1500 and GMC Sierra 1500 vehicles, 2015-2016 Cadillac Escalade and Escalade ESV, Chevrolet Tahoe, Trax, Suburban and Silverado 2500 and 3500 and GMC Yukon and Yukon XL vehicles, and 2015-2017 GMC Sierra HD 2500 and 3500 vehicles. While being previously remedied for recall 16V-651, the affected vehicles may not have received the complete software update necessary to remedy the recall condition. Without the update, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.

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Frequently Asked Questions

What are the most common Buick LaCrosse problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2005-2017 Buick LaCrosse has 11 documented issues. The most frequently reported are: Electronic Power Steering Connector Corrosion / Loss of Assist (Recall 17V116000), Headlamp Driver Module Overheats and Kills Headlights (Recall 15V519000), Ignition Switch Can Rotate Out of Run With a Loaded Key Ring (Recall 14V355000). Of these, 9 are rated critical and should be addressed promptly.

Is the Buick LaCrosse reliable?

The 2005-2017 Buick LaCrosse has 11 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 9 issues are rated critical: Electronic Power Steering Connector Corrosion / Loss of Assist (Recall 17V116000) and Headlamp Driver Module Overheats and Kills Headlights (Recall 15V519000) and Ignition Switch Can Rotate Out of Run With a Loaded Key Ring (Recall 14V355000) and 3.8L V6 Lower Intake Manifold Gasket / Plastic Coolant Elbow Leaks and eAssist 12V Battery Drain and "Service Battery Charging System" Warnings and Intermittent Low-Beam Headlight Failure and Rear Suspension Toe-Link May Loosen / Fracture (Recalls 17V267000 & later) and 3.6L V6 Timing Chain Stretch and Wear and LaCrosse 3.6L LLT/LFX Timing Chain Stretch. 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 Buick LaCrosse problems?

Repair costs for known Buick LaCrosse issues range from $150 to $4,500, 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 Buick LaCrosse is the most reliable?

Reliability varies across model years of the Buick LaCrosse. 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 2005-2017 Buick LaCrosse with 11 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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GM recalled the Buick LaCrosse under NHTSA campaign 15V519000 (GM number 14291) because the headlamp driver module (HDM) can overheat and fail. When the module fails, the headlamps and the daytime running lights stop illuminating. NHTSA notes that headlamps which do not come on reduce how well the driver can see the road ahead and how easily oncoming traffic can see the LaCrosse, raising the risk of a crash. The campaign as a whole covers roughly 429,170 vehicles across several GM, Isuzu and Saab models — that figure is campaign-wide and is not a count of LaCrosse sedans.

Common Symptoms

  • Headlamps do not illuminate
  • Daytime running lights do not illuminate
  • Loss of forward lighting at night

How to Fix

The repair is free. GM notified owners and dealers replace the headlamp driver module at no charge; the recall repair began May 17, 2016. Buick customer service can be reached at 1-800-521-7300, and GM's internal recall number is 14291. Enter your VIN at nhtsa.gov/recalls to confirm whether your LaCrosse is included and whether the HDM replacement was ever performed.

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Community Reported
Medium ConfidenceVerifiedReviewed Aug 2026

NHTSA recall 14V355000 covers 2005-2009 Buick LaCrosse sedans. On these cars the weight hanging on the key ring, combined with road conditions or some other jarring event, can move the ignition switch out of the run position while you are driving. GM's own guidance to LaCrosse owners is to strip the key ring down to nothing but the ignition key and to take the key fob off the ring as well until the recall work is done. The campaign is large - 3,141,731 vehicles across all makes and models included in it - and the LaCrosse is one of six GM vehicles named.

Common Symptoms

  • Engine shuts off unexpectedly while driving
  • Ignition key moves out of the run position
  • Loss of power steering assist after the engine stops
  • Loss of power brake assist after the engine stops

How to Fix

The remedy is free at any Buick dealer. The dealer installs two key rings and either an insert in the key slot or a cover over the key head on every ignition key for the vehicle, so the key hangs in a way that does not let weight tug the switch out of run. Owner notification began September 23, 2014. Enter your VIN at nhtsa.gov/recalls to confirm whether your LaCrosse still has this open, or call Buick customer service at 1-800-521-7300. In the meantime, drive with the ignition key alone on the ring.

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

LaCrosse models equipped with the eAssist mild-hybrid system suffer recurring charging and 12V battery problems tied to the Generator Control Module and the hybrid battery energy control module. Owners report parasitic battery drain, no-start conditions, and "Service Battery Charging System" messages. GM issued a recall (NHTSA 13V173000) for a Generator Control Module malfunction on eAssist cars, and dealers ran a module/battery exchange program through GM TAC.

This issue also affects: Buick Regal, Chevrolet Cruze, Cadillac CT4

Common Symptoms

  • Service Battery Charging System warning message
  • Battery drains overnight / parasitic draw
  • No-start or intermittent no-start
  • Reduced or lost hybrid assist and fuel economy
  • Stalling

How to Fix

Have the dealer diagnose the Generator Control Module and Battery Energy Control Module per the GM exchange/recall program; replace failed modules and the 12V battery as needed. Check for the open recall by VIN. Inspect the hybrid battery control module wiring harness for shorts when chasing parasitic drain.

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Typical repair cost:$500 - $2,500

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

First-generation LaCrosse/Allure owners filed a large number of NHTSA complaints about the low-beam headlights cutting off intermittently while driving, then sometimes coming back on. This is one of the single most-reported problems for the 2006 model year and a recognized safety concern because of sudden loss of forward lighting at night.

Common Symptoms

  • Low-beam headlights turn off intermittently while driving
  • Headlights flicker
  • One or both headlights cut out then return
  • Loss of forward lighting at night

How to Fix

Diagnose the headlight wiring, the underhood bussed electrical center/relays, and the headlamp switch/connectors for heat damage and loose terminals; repair or replace affected harness connectors and relays. Some owners resolve it by replacing corroded headlamp socket connectors.

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

On certain 2014 LaCrosse vehicles, a wiring splice in the driver's door can corrode and break. This eliminates the audible key-in-ignition / door-open chime (increasing rollaway risk) and can leave the Retained Accessory Power module active for about ten minutes, allowing the power windows and sunroof to be operated after the vehicle is shut off, an injury risk for unsupervised occupants.

Common Symptoms

  • No door-open chime when key is in ignition
  • Power windows/sunroof operate after car is off
  • Intermittent driver door window/lock operation
  • Door switch functions stop working

How to Fix

Under recall 14V317000, dealers inspect the driver door window motor harness and replace the electrical splice as necessary, free of charge. For non-recall door-harness wear, repair or re-splice the broken wires in the door jamb flex loom.

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High ConfidenceVerifiedReviewed Jun 2026

The GM 3.6L V6 (LY7/LLT, and to a lesser extent the early LFX) used in the second-generation LaCrosse is prone to premature timing chain wear and stretch, especially on pre-2012 engines. Worn chains throw off cam-to-crank correlation, setting timing codes and, if neglected, can cause valve-to-piston contact and catastrophic engine damage. The problem is worsened by extended oil-change intervals and a marginal PCV system that accelerates oil contamination.

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

Common Symptoms

  • Metallic rattle or clatter from front of engine for 2-5 seconds on cold start
  • Check engine light
  • Reduced engine power / limp mode
  • Engine ticking or rattling noise
  • Rough running or misfire

How to Fix

Replace the timing chains, guides, and tensioners (a full timing set) along with the cam phasers; budget for a labor-intensive front-of-engine teardown. Maintain strict 5,000-mile oil changes with the correct dexos1 oil to prevent recurrence. GM revised chain and tensioner components for later production engines.

Typical repair cost:$1,500 - $3,000

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

The GM 3.6L LLT (2007-2011) and LFX (2012+) "High Feature" V6 in LaCrosse, Enclave, Acadia, Traverse, CTS, Cadillac SRX, and many others suffers timing chain stretch typically between 80,000-150,000 miles. Root cause is oil-related — original OLM intervals (up to 12,000 miles) starved the chain of fresh oil. Excessive oil consumption (LLT also has a known consumption issue) accelerates wear.

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

Common Symptoms

  • cold start rattle
  • check engine light
  • extended cranking
  • misfire
  • low oil between changes

How to Fix

Full timing chain kit ($2,000-$3,500 incl. labor) — both primary and secondary chains, all tensioners and guides. Switch to 5,000-7,500 mile oil intervals with full-synthetic dexos1 5W-30. LLT engines may also need PCV valve replacement to reduce oil consumption (TSB 10-06-01-007).

Typical repair cost:$2,000 - $4,500

Research This Issue

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Manually Verified
High Confidence

On certain third-generation LaCrosse models, the electrical connectors for the Electronic Power Steering (EPS) system were not properly sealed, allowing water intrusion that corrodes the connectors. The resulting fault can cause a sudden loss of power steering assist, increasing crash risk, particularly at low speeds. GM issued NHTSA recall 17V116000 to address it.

This issue also affects: Chevrolet Corvette, Chevrolet Silverado 1500, Cadillac XTS

Common Symptoms

  • Sudden loss of power steering assist
  • Heavy / hard steering
  • Power steering warning light
  • Intermittent steering assist

How to Fix

Under recall 17V116000, dealers inspect, correct the seal seating, and secure the EPS connector seals free of charge. Owners should verify the recall has been completed by VIN; if assist is lost, have the EPS connectors and module inspected for corrosion.

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

First-generation LaCrosse models with the GM 3.8L (Series III) V6 commonly develop lower intake manifold gasket leaks, and the plastic coolant elbow at the water pump deforms from heat and leaks. Coolant loss can lead to overheating; in severe upper-intake cases coolant can enter a cylinder and hydro-lock the engine. This is a well-documented age/heat-related failure on this engine family.

Common Symptoms

  • Coolant smell and slow coolant loss
  • Visible coolant leak near intake / water pump
  • Overheating
  • Low coolant warning
  • White exhaust smoke or hydro-lock in severe cases

How to Fix

Replace the lower intake manifold gaskets with GM's revised gasket (higher-temp rubber with metal coolant-passage inserts) and swap the plastic coolant elbows for metal Dorman replacements. Pressure-test the cooling system and inspect for oil/coolant intermixing during the repair.

Typical repair cost:$300 - $900

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

Rear suspension toe-links on certain LaCrosse sedans were improperly installed and could loosen and disconnect (recall 17V267000), and a later expanded campaign covered toe-links that could fracture due to corrosion in salt-belt regions. A disconnected or broken toe-link causes a sudden loss of vehicle control and a significant crash risk.

Common Symptoms

  • Clunking or knocking from rear suspension
  • Rear-end wandering or loss of control
  • Uneven rear tire wear
  • Loose-feeling rear end

How to Fix

Under the applicable recall, dealers inspect the left and right rear suspension toe-link assemblies and correct the installation or replace corroded links free of charge. Owners in road-salt states should check for the expanded toe-link recall by VIN and have rear suspension inspected.

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

Across LaCrosse generations the HVAC blower motor (and on some 3800-era cars the blower resistor) commonly fails as the car ages, causing intermittent or no airflow. Additionally, a software fault in the electronic climate control (ECC) module can disable the ability to adjust HVAC settings entirely, leaving the driver unable to control heating, cooling, and ventilation.

Common Symptoms

  • No air from vents or only on certain fan speeds
  • Blower works intermittently
  • Cannot adjust temperature or fan settings
  • Climate control display unresponsive
  • AC not cooling

How to Fix

Replace the failed blower motor (and resistor module on older cars) as a common wear repair. For frozen climate controls, update or replace the ECC/HVAC control module per GM software updates; inspect connectors for corrosion.

Typical repair cost:$150 - $500

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026
Campaign #17V43700010/07/2017

AIR BAGS:FRONTAL

General Motors LLC (GM) is recalling certain model year 2015-2017 Chevrolet Silverado 2500 HD, 3500 HD, Tahoe, Suburban, GMC Sierra 2500 HD and 3500 HD, GMC Yukon, GMC Yukon XL, Cadillac Escalade and Cadillac Escalade ESV vehicles and 2014-2017 Chevrolet Corvette, Silverado 1500, Trax, Caprice Police Pursuit Vehicle, GMC Sierra 1500, Buick Encore, and 2014-2016 Buick Lacrosse, Chevrolet Spark EV and SS vehicles. In the affected vehicles, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.

Campaign #16V65100008/09/2016

AIR BAGS:SIDE/WINDOW

General Motors LLC (GM) is recalling certain model year 2015 Buick LaCrosse, Cadillac XTS, Chevrolet Camaro, Equinox, Malibu, and GMC Terrain vehicles. The affected vehicles have front seat-mounted side impact air bags whose inflator may rupture upon its deployment.

Campaign #15V66600016/10/2015

+ 8 more recalls. Check all on NHTSA.gov

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

get a full repair guide

What is the 2017 Buick LaCrosse Electronic Power Steering Connector Corrosion / Loss of Assist (Recall 17V116000)?

On certain third-generation LaCrosse models, the electrical connectors for the Electronic Power Steering (EPS) system were not properly sealed, allowing water intrusion that corrodes the connectors. The resulting fault can cause a sudden loss of power steering assist, increasing… Severity: high.

What is the 2005-2009 Buick LaCrosse Headlamp Driver Module Overheats and Kills Headlights (Recall 15V519000)?

GM recalled the Buick LaCrosse under NHTSA campaign 15V519000 (GM number 14291) because the headlamp driver module (HDM) can overheat and fail. When the module fails, the headlamps and the daytime running lights stop illuminating. NHTSA notes that headlamps which do not come on r… Severity: high.

What is the 2005-2009 Buick LaCrosse Ignition Switch Can Rotate Out of Run With a Loaded Key Ring (Recall 14V355000)?

NHTSA recall 14V355000 covers 2005-2009 Buick LaCrosse sedans. On these cars the weight hanging on the key ring, combined with road conditions or some other jarring event, can move the ignition switch out of the run position while you are driving. GM's own guidance to LaCrosse ow… Severity: high.

What is the 2005-2009 Buick LaCrosse 3.8L V6 Lower Intake Manifold Gasket / Plastic Coolant Elbow Leaks?

First-generation LaCrosse models with the GM 3.8L (Series III) V6 commonly develop lower intake manifold gasket leaks, and the plastic coolant elbow at the water pump deforms from heat and leaks. Coolant loss can lead to overheating; in severe upper-intake cases coolant can enter… Repairs typically run $300-$900. Severity: high.

What is the 2012-2016 Buick LaCrosse eAssist 12V Battery Drain and "Service Battery Charging System" Warnings?

LaCrosse models equipped with the eAssist mild-hybrid system suffer recurring charging and 12V battery problems tied to the Generator Control Module and the hybrid battery energy control module. Owners report parasitic battery drain, no-start conditions, and "Service Battery Char… Repairs typically run $500-$2,500. Severity: high.

What is the 2005-2008 Buick LaCrosse Intermittent Low-Beam Headlight Failure?

First-generation LaCrosse/Allure owners filed a large number of NHTSA complaints about the low-beam headlights cutting off intermittently while driving, then sometimes coming back on. This is one of the single most-reported problems for the 2006 model year and a recognized safety… Severity: high.

What is the 2017 Buick LaCrosse Rear Suspension Toe-Link May Loosen / Fracture (Recalls 17V267000 & later)?

Rear suspension toe-links on certain LaCrosse sedans were improperly installed and could loosen and disconnect (recall 17V267000), and a later expanded campaign covered toe-links that could fracture due to corrosion in salt-belt regions. A disconnected or broken toe-link causes a… Severity: high.

What is the 2010-2012 Buick LaCrosse 3.6L V6 Timing Chain Stretch and Wear?

The GM 3.6L V6 (LY7/LLT, and to a lesser extent the early LFX) used in the second-generation LaCrosse is prone to premature timing chain wear and stretch, especially on pre-2012 engines. Worn chains throw off cam-to-crank correlation, setting timing codes and, if neglected, can c… Repairs typically run $1,500-$3,000. Severity: high.

What is the 2010-2016 Buick LaCrosse LaCrosse 3.6L LLT/LFX Timing Chain Stretch?

The GM 3.6L LLT (2007-2011) and LFX (2012+) "High Feature" V6 in LaCrosse, Enclave, Acadia, Traverse, CTS, Cadillac SRX, and many others suffers timing chain stretch typically between 80,000-150,000 miles. Root cause is oil-related — original OLM intervals (up to 12,000 miles) st… Repairs typically run $2,000-$4,500. Severity: high.

What is the 2014 Buick LaCrosse Driver Door Wiring Splice Corrosion (Recall 14V317000)?

On certain 2014 LaCrosse vehicles, a wiring splice in the driver's door can corrode and break. This eliminates the audible key-in-ignition / door-open chime (increasing rollaway risk) and can leave the Retained Accessory Power module active for about ten minutes, allowing the pow… Severity: medium.

What is the 2008-2014 Buick LaCrosse HVAC Blower Motor and Climate Control Module Failures?

Across LaCrosse generations the HVAC blower motor (and on some 3800-era cars the blower resistor) commonly fails as the car ages, causing intermittent or no airflow. Additionally, a software fault in the electronic climate control (ECC) module can disable the ability to adjust HV… Repairs typically run $150-$500. Severity: medium.