Chevrolet Silverado / GMC Sierra. Service manual — part 965

Fig. 421: Compressing Control Relief Valve Spring
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: To prevent confusing parts during assembly, use J 33163 to

store the removed valves, springs, and stops. See Special
Tools.

2008 Chevrolet Silverado 1500

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

Silverado

1. Using J 43773 (2), compress the control relief spring until the retaining clip (1) is loose.

See Special Tools.

2. Remove the clip.

Fig. 422: Identifying Control Relief Spring & Control Relief Valve
Courtesy of GENERAL MOTORS CORP.

3. Remove the control relief spring (2) and the control relief valve (1).

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 423: Compressing Exhaust Pressure Regulator Valve Spring
Courtesy of GENERAL MOTORS CORP.

4. Using J 43773 (2), compress the exhaust pressure regulator valve spring until the retaining

clip (1) is loose. See Special Tools.

5. Remove the clip.

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 424: Locating Exhaust Pressure Regulator Valve & Spring
Courtesy of GENERAL MOTORS CORP.

6. Remove exhaust pressure regulator valve spring (2) and exhaust pressure regulator valve (1).

CONTROL VALVE BODY LOCATION PIN REPLACEMENT

Tools Required

J 43779 Locating Pin Installer. See Special Tools.

Replacement

2008 Chevrolet Silverado 1500

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

Silverado