Chevrolet Silverado / GMC Sierra. Manual — part 1146
3. Lubricate NEW O-ring (249) with transmission fluid and position the O-ring as shown.
4. Insert the ISS (250) into oil pump ISS bore and fully seat.
5. Align ISS bolt hole insert with the oil pump mounting hole.
6. Install bolt (247).
Tighten: Tighten the bolt to 9-11 N.m (6.6-8.1 lb ft).
NOTE:
Refer to Fastener Notice .
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
Fig. 451: Identifying ISS Assembly Wire Harness
Courtesy of GENERAL MOTORS CORP.
7. Route the ISS assembly (250) wire harness as shown. Install harness bracket #1 and #2 in
the locations shown. Ensure the wire harness lays flat against the pump housing.
OIL PUMP ASSEMBLY INSTALLATION
Special Tools
J 25025-1 Dial Indicator Mounting Post
J 36850 Transjel Lubricant. See Special Tools.
J 39855 Stator Shaft Seal Installer. See Special Tools.
Installation
IMPORTANT: Ensure the ISS brackets securley fasten the wiring harness
to the pump housing.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
Fig. 452: Installing J 25025-1
Courtesy of GENERAL MOTORS CORP.
1. Install the J 25025-1 .
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
Fig. 453: View Of 39855-2
Courtesy of GENERAL MOTORS CORP.
2. Remove the J 39855-2 which is part of kit J 39855 . See Special Tools.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
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