Chevrolet Silverado / GMC Sierra. Service manual — part 762

AUTOMATIC TRANSMISSION FLUID PRESSURE TEST HOLE PLUG
REPLACEMENT

REMOVAL PROCEDURE

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

Fig. 70: View Of Oil Pressure Test Plug
Courtesy of GENERAL MOTORS CORP.

Tighten: 25 N.m (18 lb ft)

2

Transmission Heat Shield

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

2. Clean the surrounding area of the oil pressure test plug.

3. Remove the oil pressure test plug.

INSTALLATION PROCEDURE

Fig. 71: View Of Oil Pressure Test Plug
Courtesy of GENERAL MOTORS CORP.

1. Install the oil pressure test plug.

Tighten: Tighten the oil pressure test plug to 11 N.m (97 lb in).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

2. Check the transmission fluid level (fill if necessary). Refer to Transmission Fluid Check.

3. Lower the vehicle.

AUTOMATIC TRANSMISSION ELECTRICAL CONNECTOR PASSAGE
SLEEVE REPLACEMENT

Fig. 72: Automatic Transmission Electrical Connector Passage Sleeve Replacement
Courtesy of GENERAL MOTORS CORP.

Callout

Component Name

Preliminary Procedures

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

NOTE:

Orientate the alignment tab inside the passage sleeve with the slot in the electrical connector of the
control solenoid valve assembly. Push the sleeve straight into the case bore and connector. Do
NOT rotate the sleeve at any time. Ensure the sleeve is fully seated into the case. When the sleeve is
properly installed, the distance from the case surface to the end of the sleeve should be 14-16 mm.
Even though the correct electrical connections may still be maintained, failure to ensure proper
installation of the sleeve may result in a fluid leak around the sleeve lip seal and into the sleeve
cavity.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

AUTOMATIC TRANSMISSION FLUID, FLUID PAN AND/OR FILTER
REPLACEMENT

2. Remove the transmission oil pan. Refer to Automatic Transmission Fluid, Fluid

Pan and/or Filter Replacement.

3. Disconnect the vehicle wire harness electrical connector from the transmission

electrical connector passage sleeve.

1

Electrical Connector Slide Lock
Tip: Pull down on the slide lock to remove the sleeve. Push up on the slide lock
after sleeve installation.

2

Electrical Connector Passage Sleeve
Tip:

Use the DT 47715 Electrical Connector Passage Sleeve Remover/Installer
and J 42183 Driver Handle to remove and install the electrical connector
passage sleeve. See Special Tools.

The distance (a) from the case surface to the end of the sleeve should be
14-16 mm.

Special Tools

DT 47715 Electrical Connector Passage Sleeve Remover/Installer. See
Special Tools.

J 42183 Driver Handle. See Special Tools.

3

O-Ring Seal (Qty: 2)
Tip: Use a NEW O-ring seal.

4

Lip Seal
Tip: Use a NEW lip seal.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado