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Buick · Known Issues

2015 Buick LaCrosse Problems: 2 Known Issues

2015 model year · 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 2015 Buick LaCrosse has 2 documented known issues, with 2 rated critical. The most serious are eAssist 12V Battery Drain and "Service Battery Charging System" Warnings ($500-$2,500 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 $500 to $4,500. DIY maintenance guides at au7o.io.

In This Article

  • LaCrosse Electrical1
  • LaCrosse Engine1
  • Recalls13
  • FAQ
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In This Article

  • Electrical1
  • Engine1
  • Recalls13
  • FAQ

All 2 Known Issues

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ALL YEARS2017201620152014201320122011201020092008200720062005

On the 2012-2016 Buick LaCrosse, 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

On the 2010-2016 Buick LaCrosse 3.6L LFX/LLT V6, 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
NHTSA Recalls13 recalls

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.

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.

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Other Buick Models

Buick Encore25Buick Cascada22Buick Regal13Buick Enclave13Buick Envision12Buick Encore GX12

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 2015 Buick LaCrosse has 2 documented issues. The most frequently reported are: eAssist 12V Battery Drain and "Service Battery Charging System" Warnings, LaCrosse 3.6L LLT/LFX Timing Chain Stretch. Of these, 2 are rated critical and should be addressed promptly.

Is the Buick LaCrosse reliable?

The 2015 Buick LaCrosse has 2 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 2 issues are rated critical: eAssist 12V Battery Drain and "Service Battery Charging System" Warnings 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 $500 to $4,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, eAssist 12V Battery Drain and "Service Battery Charging System" Warnings, typically costs $500-$2,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

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 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.

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.

Campaign #16V65100008/09/2016

ELECTRICAL SYSTEM

General Motors LLC (GM) is recalling certain model year 2014 Buick LaCrosse vehicles manufactured April 30, 2013, to September 1, 2013. In the affected vehicles, a wiring splice in the driver's door may corrode and break, resulting in the absence of an audible chime to notify the driver if the door is opened while the key is in the ignition. Additionally, the Retained Accessory Power (RAP) module may stay active for ten minutes allowing the operation of the passenger windows, rear windows, and sunroof. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) numbers 114, "Theft Protection and Rollaway Prevention," and 118, "Power-Operated Window, Partition, and Roof Panel Systems."

Campaign #14V31700012/06/2014

SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC

General Motors LLC (GM) is recalling certain model year 2014 Buick Lacrosse vehicles manufactured January 29, 2014, through March 31, 2014 and 2014 Chevrolet Malibu vehicles manufactured February 7, 2014, through March 31, 2014, and equipped with 17 inch front brake rotors. The affected vehicles may have had brake rotors intended for the rear of the car accidentally installed on the front. The rear rotors, while the same diameter, are thinner and may result in a front brake pad detaching from the caliper.

Campaign #14V24000008/05/2014

POWER TRAIN:AUTOMATIC TRANSMISSION

General Motors LLC (GM) is recalling certain model year 2014 Buick Regal, LaCrosse, Verano, and Enclave, and Chevrolet Impala, Malibu, Cruze, and Traverse, and GMC Acadia vehicles equipped with automatic transmissions. In the affected vehicles, the transmission shift cable adjuster may disengage from the transmission shift lever. As such, these vehicles do not conform to Federal Motor Vehicle Safety Standard (FMVSS) number 102, "Transmission Shift Lever Sequence, Starter Interlock, and Transmission Braking Effect." They also fail to conform to FMVSS number 114, "Theft Protection and Rollaway Prevention."

Campaign #14V09200021/02/2014

+ 8 more recalls. Check all on NHTSA.gov

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