GM Service Manual Online
For 1990-2009 cars only

Condition

Action

DEFINITION: No engine braking occurs in 1st, 2nd or 3rd gear during deceleration.

Park/neutral position switch (72)

    • Inspect the park/neutral position switch for proper alignment (72).
    • Adjust the park/neutral position switch for proper alignment (72).

Shift cable adjustment

    • Inspect shift cable to ensure transmission is shifting in the proper shift positions.
    • Adjust shift cable if out of adjustment.

Valve body (39)

Replace valve body (39).

Internal transmission failure

    • Disassemble the transmission and inspect for failed components.
    • If failed components, replace transmission assembly.