Chevrolet Silverado / GMC Sierra. Manual — part 850

Fig. 39: Transmission External Oil Filter Assembly
Courtesy of GENERAL MOTORS CORP.

1. Remove the transmission external oil filter (4) by rotating in the counterclockwise direction.

2. Remove the magnet (2) from the transmission external oil filter adapter (1) in the converter

IMPORTANT:

DO NOT drain the fluid if only the transmission external
oil filter adapter is being replaced.

Use a standard strap-type filter wrench to remove or
install the transmission external oil filter.

2008 Chevrolet Silverado 1500

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

Silverado

housing or from the filter element.

3. Clean any metal debris from the magnet. Presence of any metal pieces larger than dust may

indicate that transmission replacement or overhaul is required.

4. Remove the filter adapter (1) from the converter housing.

Installation Procedure

Fig. 40: Transmission External Oil Filter Assembly
Courtesy of GENERAL MOTORS CORP.

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

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

Silverado