GM Service Manual Online
For 1990-2009 cars only

Loss of Power

Checks

Actions

O/D switch

Faulty switch

ATF temperature sensor

Refer to DTC 17 .

Line pressure solenoid

Refer to DTC 48 .

Shift solenoid

Refer to DTC 53 and DTC 58 .

Transmission control module (TCM)

Refer to Diagnostic System Check - Automatic Transmission .

Oil pump

Damage or wear to the oil pump gears

Torque converter

Internal damage

Control valve spool sliding

Damage to the control valve spool

High clutch

Burn or wear of the high clutch. Refer to High Clutch Disassemble

2-4 brake band

Burnt or worn 2-4 brake band