GM Service Manual Online
For 1990-2009 cars only

Probable Cause

Action

DEFINITION: The transmission will shift into REVERSE with high effort, or the transmission will not shift into REVERSE.

The reverse lockout solenoid circuit is not functioning properly, or the reverse lockout solenoid is defective.

  1. Inspect the function of the reverse lockout solenoid circuit.
  2. Inspect the function of the reverse lockout solenoid.
  3. Repair or replace components as necessary.
  4. • For inspection of the reverse lockout solenoid circuit and the reverse lockout solenoid function, refer to DTC P0803 in Engine Controls.
    • For the reverse lockout solenoid replacement procedure, refer to Reverse Lockout Solenoid .

The reverse lockout mechanism is not functioning properly.

  1. Remove the transmission.
  2. Refer to Transmission Replacement .

  3. Remove the reverse lockout mechanism and inspect for function, wear or damage.
  4. Replace worn or damaged components as necessary.

Refer to the Transmission Unit Repair Manual.

There is an internal bind in the transmission, caused by the shift linkage or synchronizer.

  1. Remove the transmission.
  2. Refer to Transmission Replacement .

  3. Disassemble and inspect the transmission for the following:
  4. • Worn, damaged or broken shift linkage components
    • Worn or damaged synchronizer sleeve or hub
  5. Replace worn, damaged or broken components as necessary.

Refer to Transmission Disassemble the Transmission Unit Repair Manual.