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2012 Buick LaCrosse Problems: 4 Known Issues

2012 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 2012 Buick LaCrosse has 4 documented known issues, with 3 rated critical. The most serious are 3.6L V6 Timing Chain Stretch and Wear ($1,500-$3,000 repair), LaCrosse 3.6L LLT/LFX Timing Chain Stretch ($2,000-$4,500 repair) and eAssist 12V Battery Drain and "Service Battery Charging System" Warnings ($500-$2,500 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 Engine2
  • LaCrosse Electrical1
  • LaCrosse HVAC1
  • Recalls13
  • FAQ
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In This Article

  • Engine2
  • Electrical1
  • HVAC1
  • Recalls13
  • FAQ

All 4 Known Issues

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On the 2010-2012 Buick LaCrosse, 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

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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

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Manually Verified
High Confidence

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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Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.

Typical repair cost:$500 - $2,500

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

On the 2008-2014 Buick LaCrosse, 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

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High ConfidenceVerifiedReviewed Jun 2026
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 Cascada20Buick Enclave13Buick Encore GX12Buick Regal12Buick Envision12

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 2012 Buick LaCrosse has 4 documented issues. The most frequently reported are: 3.6L V6 Timing Chain Stretch and Wear, LaCrosse 3.6L LLT/LFX Timing Chain Stretch, eAssist 12V Battery Drain and "Service Battery Charging System" Warnings. Of these, 3 are rated critical and should be addressed promptly.

Is the Buick LaCrosse reliable?

The 2012 Buick LaCrosse has 4 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 3 issues are rated critical: 3.6L V6 Timing Chain Stretch and Wear and LaCrosse 3.6L LLT/LFX Timing Chain Stretch and eAssist 12V Battery Drain and "Service Battery Charging System" Warnings. 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. The most critical issue, 3.6L V6 Timing Chain Stretch and Wear, typically costs $1,500-$3,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

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.

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

POWER TRAIN:AUTOMATIC TRANSMISSION

General Motors (GM) is recalling certain model year 2013 Buick LaCrosse vehicles, manufactured between April 25, 2012, through March 6, 2013, and model year 2013 Cadillac SRX vehicles, manufactured between May 29, 2012, through February 18, 2013 for failing to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 102, "Transmission Shift Lever Sequence, Starter Interlock, and Transmission Braking Effect." A software problem may cause the transmission to inadvertently shift to Sport mode removing any transmission-related engine braking effect.

Campaign #13V09700015/03/2013

ELECTRICAL SYSTEM

General Motors (GM) is recalling certain model year 2012 and 2013 Buick LaCrosse and Regal, and model year 2013 Chevrolet Malibu Eco vehicles equipped with eAssist. These vehicles may have a condition in which the Generator Control Module (GCM) may not function properly. This could cause a gradual loss of battery charge and the illumination of the malfunction indicator light.

Campaign #13V17300006/05/2013

SUSPENSION:REAR

General Motors, LLC (GM) is recalling certain 2012-2013 Buick Regal, 2013 Chevrolet Malibu, and 2010-2013 Buick Lacrosse vehicles sold or ever registered in Connecticut, Delaware, the District of Columbia, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, Virginia, West Virginia, or Wisconsin. These vehicles may have rear toe links that received excessive electrocoating (e-coat) corrosion protection, which could cause the e-coat to become brittle and break away when contacted by road debris. Over time, the e-coat may chip away, exposing the metal toe link and making it more susceptible to corrosion. Corrosion may eventually cause the toe link to thin and ultimately to fracture.

Campaign #20V76400021/12/2020

+ 8 more recalls. Check all on NHTSA.gov

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

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 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.