GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

Variable Low 1-2R Clutch Assembly

    â€¢ Inspect for damaged VL1-2R clutch piston assembly.
    â€¢ Inspect for worn or damaged VL1-2R splines.
    â€¢ Inspect for damaged VL1-2R clutch piston assembly.
    â€¢ Inpsect for worn or damaged VL1-2R splines.

Drive Motor with Generator Position 2 (B)

    â€¢ Inspect splines.
    â€¢ Inspect HV connections.

Front Differential Carrier Assembly

Inspect for damaged gears and bearings.

Front Differential Drive Pinion (w/Transfer Gear) Gear Assembly

Inspect for damaged gears and bearings.