Chevrolet Silverado / GMC Sierra. Manual — part 886

Fig. 159: Identifying Pan And Filter Assembly
Courtesy of GENERAL MOTORS CORP.

4. Position the main housing so that the oil pan is facing up.

5. Remove the drain plug (1).

6. Remove the drain plug seal (2) from the drain plug (1).

7. Remove 12 oil pan bolts (7). Remove the oil pan (3).

8. Remove the oil pan gasket (4).

9. Remove the transmission internal oil filter (5).

10. Remove the transmission internal oil filter seal (6).

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 160: View Of Transmission Oil Pan Magnet
Courtesy of GENERAL MOTORS CORP.

11. Inspect and clean the transmission oil pan magnet (1) in the oil pan (2).

WIRING HARNESS REMOVAL

IMPORTANT: The magnet cannot be removed from the oil pan.

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 161: Depressing 4 Tabs On Internal Wiring Harness Connector
Courtesy of GENERAL MOTORS CORP.

1. Using a 30-32 mm (1 3/16 in) deep well socket or box end wrench, depress the 4 tabs on

internal wiring harness connector (1). With the tabs depressed, gently pop the connector into
and through the transmission case with the palm of the hand.

2008 Chevrolet Silverado 1500

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

Silverado