2012 Buick LaCrosse Service and Repair Manual

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Factory-Grade Data

2012 Buick LaCrosse service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Built for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and use wiring diagrams and system sections to diagnose problems faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical coverage with wiring diagrams
  • Coverage across key systems: engine, transmission, brakes, steering, suspension, HVAC, and more

Trims covered

  • Premium Sedan 4-Door
  • Base Sedan 4-Door
  • Leather Sedan 4-Door
  • Convenience Sedan 4-Door
  • CXS Sedan 4-Door
  • Touring Sedan 4-Door

Engines covered

  • 2.4L 2384CC 145Cu. In. l4 MILD HYBRID EV-GAS (MHEV) DOHC Naturally Aspirated
  • 3.6L 3564CC 217Cu. In. V6 FLEX DOHC Naturally Aspirated
  • 3.6L 3564CC 217Cu. In. V6 GAS DOHC Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

2012 Buick LaCrosse Recalls & Complaints

NHTSA #21V00F00022/12/2021Component: SUSPENSION:REAR

General Motors, LLC (GM) is recalling certain 2010-2013 Buick Lacrosse, 2012-2013 Buick Regal, and 2013 Chevrolet Malibu vehicles sold or ever registered in Connecticut, Delaware, the District of Colu

Consequence

A rear toe link fracture may reduce the driver's ability to control the vehicle, increasing the risk

Remedy

Dealers will replace the rear suspension toe links and adjuster fasteners, free of charge. Owner no

NHTSA #13V17300006/05/2013Component: 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 conditio

Consequence

If the vehicle is continued to be driven, the engine may stall and/or the vehicle may not start. In

Remedy

GM will notify owners and dealers will test the GCM and replace it, as necessary, free of charge. T

NHTSA #11V40400003/08/2011Component: ELECTRONIC STABILITY CONTROL (ESC)

GM IS RECALLING CERTAIN MODEL YEAR 2012 BUICK LACROSSE PASSENGER VEHICLES MANUFACTURED FROM JUNE 9, 2011, THROUGH JULY 2, 2011, FOR FAILING TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFE

Consequence

THE IMPROPER DIAGNOSING MAY CAUSE THE ESC TO FALSELY ACTIVATE, RESULTING IN SUDDEN CHANGES IN VEHICL

Remedy

GM DEALERS WILL REPROGRAM THE ELECTRONIC BRAKE CONTROL MODULE FREE OF CHARGE. THE SAFETY RECALL BEG

TSB #11030974

This preliminary information communicates information about how to determine if a wheel and tires size change is available.

TSB #11030092

This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.

TSB #11030091

This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

TSB #11027601

This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

TSB #11026104

This service bulletin provides information on Tire Sidewall Irregularities.

TSB #11026017

This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.

TSB #11025755

This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customers vehicles that exhibit vibration conditions without utilizing the s

TSB #11024485

The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.

Showing the 8 most recent of 1829 technical service bulletins on file with NHTSA.

20181221Component: AIR BAGSCrash reported1 injured

TL* THE CONTACT OWNS A 2012 BUICK LACROSSE. WHILE DRIVING 30 MPH, THE CONTACT'S VEHICLE WAS STRUCK ON THE FRONT DRIVER'S SIDE FENDER AND DOOR. THE CONTACT STATED THAT THE FRONT DRIVER'S AIR BAG FAILED

20140120Component: STRUCTURECrash reported1 injured

THE A-PILLAR OF THE VEHICLE IS EXTREMELY WIDE AND OBSTRUCTS VISIBILITY. THE VEHICLE IS DANGEROUS TO DRIVE, AND THE WIDTH OF THE PILLAR HAS CAUSED US TO POP 3-TIRES (ONE LEFT, TWO RIGHT) (THREE SEPARAT

20130328Component: VEHICLE SPEED CONTROLCrash reported1 injured

TL* THE CONTACT OWNS 2012 BUICK LACROSSE HYBRID. THE CONTACT STATED THAT WHILE DRIVING 5 MPH AND ATTEMPTING TO PARK, THE VEHICLE SUDDENLY ACCELERATED TO 100 MPH AND CRASHED INTO A WALL. THE VEHICLE WA

20251105Component: STEERINGCrash reported

during a regular drive the check stabiltrack system message popped up on the dash in the middle circle and then the little car with the squiggly lines behind it popped up and the check engine light ca

20251105Component: VEHICLE SPEED CONTROLCrash reported

during a regular drive the check stabiltrack system message popped up on the dash in the middle circle and then the little car with the squiggly lines behind it popped up and the check engine light ca

Showing the 5 most serious of 298 complaints filed with NHTSA.

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