Chevrolet Silverado / GMC Sierra. Service manual — part 939

Fig. 331: View of Detent Lever/IMS Assembly And Park Pawl Assembly
Courtesy of GENERAL MOTORS CORP.

4. Install the nib of the park pawl assembly (1) through the keyhole in the detent lever/internal

mode switch (IMS) assembly (2).

5. Rotate the park pawl assembly 180 degrees.

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 332: Manual Shift Shaft
Courtesy of GENERAL MOTORS CORP.

6. Place the roller end of the park pawl assembly (5) into the transmission case.

7. Align the detent lever/IMS assembly (3) so that:

The detent notches of the detent lever are facing up.

The IMS connector is facing towards the rear of the transmission.

The guide hole for the manual valve pin is facing forward.

The manual shift shaft hole in the detent lever is aligned with the manual shift shaft seal
(2).

8. Slide the manual shift shaft (1) through the following components:

Transmission case

2008 Chevrolet Silverado 1500

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

Silverado

Manual shift shaft seal (2)

Detent lever/IMS assembly (3)

Fig. 333: Detent Lever/IMS Assembly Retaining Bolt
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: The detent lever/IMS assembly retaining bolt contains patch

lock material on the threads. Do not reuse the retaining bolt.

2008 Chevrolet Silverado 1500

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

Silverado

9. Install the detent lever/IMS assembly (2) onto the manual shift shaft (1).

10. Install the detent lever/IMS assembly retaining bolt (3).

11. Using a T27 Torx® bit, tighten the detent lever/IMS assembly retaining bolt (3).

Tighten: Tighten the bolt to 10 N.m (89 lb in).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

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

Silverado