GM Service Manual Online
For 1990-2009 cars only

Checks

Action

Lug bolts for the torque converter (1)

Inspect for loose torque converter (1) lug bolts. Tighten the lug bolts.

Bolts (19, 20) securing the transmission fluid pump assembly (23) to the case

Inspect for loose or stripped bolts securing the transmission fluid pump assembly to the case. Tighten or replace the bolts (19, 20). Refer to Transmission Fluid Pump Assembly Installation .

Line 1 pressure regulator valve (316)

Inspect for worn, sticking or binding valve. Replace the line 1 pressure regulator valve (316). Refer to Control Valve Body Assembly Disassemble .

Line 1 pressure regulator valve spring (315)

Inspect for worn, sticking or damaged spring. Replace the line 1 pressure regulator valve spring (315). Refer to Control Valve Body Assembly Disassemble .

Line 2 pressure regulator valve (212)

Inspect for worn, sticking or binding valve. Replace the line 2 pressure regulator valve (212). Refer to Control Valve Body Assembly Disassemble .

Line 2 pressure regulator valve spring (211)

Inspect for worn, sticking or damaged spring. Replace the line 2 pressure regulator valve spring (211). Refer to Control Valve Body Assembly Disassemble .

Control valve body (305)

Inspect for porosity, damage or contamination with debris. Replace or flush the control valve body (305). Refer to Control Valve Body Replacement .