Chevrolet Silverado / GMC Sierra. Service manual — part 959
24. Remove the PCS2 (9), valve (7), valve (6), and spring (5).
25. Remove the O-ring (14) from the PCS1 (15).
26. Remove the O-ring (8) from the PCS2 (9).
Fig. 399: Shift Solenoid
Courtesy of GENERAL MOTORS CORP.
27. Position the control valve body on the work table so that the shift valve body (1) is facing
up.
28. Remove the shift solenoid 1 (SS1) retainer (2).
29. Remove the SS1 (5).
30. Remove the O-rings (3, 4) from SS1 (5).
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Fig. 400: Shift Valve Body Bolts
Courtesy of GENERAL MOTORS CORP.
NOTE:
DO NOT damage the solenoids when turning over the control
valve assembly.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
31. Position the control valve assembly on the work table so that the main valve body is facing
up.
Remove 11 bolts (1) retaining the shift valve body and the main valve body together.
32. Position the control valve body assembly on the work table so that the main valve body is
on edge, sideways.
33. Reinstall 4 bolts (1) so that the bolts are partially threaded into the shift valve body and
protrude from the main valve body.
34. Gently tap the bolts until the assembly separates.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Fig. 401: Separating Shift Valve Body Assembly, Separator Plate, And Main Valve
Body Assembly
Courtesy of GENERAL MOTORS CORP.
35. Position the control valve assembly on the work table so that the shift valve body (1) is
facing up.
36. Separate the shift valve body assembly (1), the separator plate (2), and the main valve body
assembly (4).
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
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