2012 Buick LaCrosse Service and Repair Manual

This factory service and repair manual for the 2012 Buick LaCrosse addresses a four-door sedan sold in six trims, from Base and Convenience through CXS, Leather, Premium and Touring. The engine list has two entries. One is a 2.4L inline-four with double overhead cams set up as a mild hybrid on gasoline; the other is a 3.6L V6, also double-overhead-cam, able to run on flex-fuel or gasoline. Neither uses forced induction. Procedures, specifications, torque values, wiring diagrams and diagnostics address the engines, the mild hybrid system, fuel and cooling, the transmission, brakes and stability control, suspension, steering and electrical system.

Engines covered

• 2.4L inline-four mild hybrid (145 cu in) — DOHC, naturally aspirated, gasoline
• 3.6L V6 (217 cu in) — DOHC, naturally aspirated, flex-fuel or gasoline

Body styles covered

• 4-door sedan

Trims covered

• Base
• Convenience
• CXS
• Leather
• Premium
• Touring

Known issues on the 2012 LaCrosse. The federal record carries 5 recalls for the 2012 LaCrosse. On certain 2012 LaCrosse vehicles with the eAssist mild hybrid system, the generator control module could malfunction, slowly draining the battery and lighting the check-engine lamp; left alone, it could lead to stalling, a no-start, or smoke and possibly fire in the trunk. Certain 2012 LaCrosse vehicles built within a specific production window, 4,077 of them, had a stability control calibration that could miss a failed sensor and trigger the system falsely; the brake control module was reprogrammed. Owners filed 206 complaints; 10 complaints reported a crash. Mild hybrid, stability control and brake diagnostics in the manual apply.