Chevrolet Silverado / GMC Sierra. Manual - part 755
Fig. 43: Tension/Adjust Cable System
Courtesy of GENERAL MOTORS CORP.
7. Release the transmission end (3) and allow the spring (2) to tension/adjust the cable system.
8. Pull the white cover (5) on the shifter end (1) back.
9. Push the natural colored lock button (4) down to engage the locking teeth on the
transmission end (3).
IMPORTANT: DO NOT hold the transmission end (1) during this operation,
this will result in a mis-adjusted cable.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
Fig. 44: View Of White Cover & Natural Colored Lock
Courtesy of GENERAL MOTORS CORP.
10. Release the white cover (1).
11. Verify the white cover (1) conceals the natural colored lock (2).
12. If the white cover (1) does not conceal the natural colored lock (2), the shift cable must be
re-adjusted. Refer to cable re-adjustment below.
13. Lower the vehicle.
14. Test the transmission for proper shift operation.
15. If all of the gear positions cannot be achieved, the shift cable must be re-adjusted. Refer to
cable re-adjustment below.
CABLE RE-ADJUSTMENT
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
Fig. 45: View Of White Cover & Natural Colored Lock
Courtesy of GENERAL MOTORS CORP.
1. Place the steering column shift lever back into the park (P) position.
2. Raise the vehicle.
3. Ensure that the transmission manual shaft lever is in the park (P) position.
4. Pull the white cover (1) back to expose the natural colored lock (2). Under the lock (2),
insert a flat-bladed screwdriver under the lock ramp located at the top of the lock. The lock
will pop up, and the transmission end will move slightly away from the shifter end.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
Fig. 46: Engaging Inner Wire And Lock Both Wires Together
Courtesy of GENERAL MOTORS CORP.
5. Push the end of the transmission end (3) inside the shifter end (1) until the blue spring (2) on
the transmission end (3) is fully compressed, this will engage the inner wire and lock both
wires together.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado