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 P0801 Reverse Inhibit Solenoid Control Circuit in Engine Controls - 5.7L.
    • For the reverse lockout solenoid replacement, 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 Transmission/Transaxle/Transfer Case Unit Repair Manual.

  5. Install the transmission.
  6. Refer to Transmission Replacement .

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

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

  3. Disassemble and inspect the transmission for worn or damaged components.
  4. Replace worn or damaged components as necessary.

    Refer to Transmission/Transaxle/Transfer Case Unit Repair Manual.

  5. Install the transmission.
  6. Refer to Transmission Replacement .