Chevrolet Silverado / GMC Sierra. Service manual — part 855

Fig. 56: Range Selector Cable Heat Shield
Courtesy of GENERAL MOTORS CORP.

18. Install the range selector cable heat shield.

19. Install the range selector cable heat shield bolts.

1. Tighten: Tighten the front bolt to 25 N.m (18 lb ft).

2. Tighten: Tighten the rear bolt to 25 N.m (18 lb ft).

20. Lower the vehicle.

NOTE:

Refer to Fastener Notice .

IMPORTANT: Install bolts by hand then mechanically tighten the front bolt

first and the rear bolt last. Failure to tighten the bolts in the
specified order will result in misalignment of the heat shield.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

21. Test the transmission for proper shift operation.

22. If all of the gear positions cannot be achieved, adjust the cable. Refer to Range Selector

Lever Cable Adjustment.

TRANSMISSION FLUID COOLER HOSE/PIPE CONNECTOR REPLACEMENT

Removal Procedure

Fig. 57: Transmission Oil Cooler Pipe Connectors
Courtesy of GENERAL MOTORS CORP.

1. Disconnect the hose from the transmission oil cooler pipe connector being replaced.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

2. Remove the transmission oil cooler pipe connectors (1) and (2).

Installation Procedure

Fig. 58: Transmission Oil Cooler Pipe Connectors
Courtesy of GENERAL MOTORS CORP.

1. Install new transmission oil cooler pipe connectors (1 and 2).

Tighten: Tighten to 25 N.m (18 lb ft).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

2. Connect the hose to the transmission oil cooler pipe connectors.

TRANSMISSION INTERNAL MODE SWITCH REPLACEMENT

Replace the IMS. Refer to Manual Shift Shaft, Detent Lever, and Position Switch Assembly
Replacement.

AUTOMATIC TRANSMISSION FLUID AND FILTER REPLACEMENT

Removal Procedure

IMPORTANT: The Internal Mode Switch (IMS) is mounted to the manual shift

shaft detent lever as an assembly. The components of the detent
lever/IMS assembly cannot be individually serviced. When the
IMS needs replacing, the entire assembly must be replaced.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado