Chevrolet Silverado / GMC Sierra. Service manual — part 1039

Fig. 56: View Of PNP Switch Electrical Connector
Courtesy of GENERAL MOTORS CORP.

1. Apply the park brake.

2. Shift the transmission into neutral.

3. If equipped with 4-wheel drive (4WD), remove the front propeller shaft. Refer to Front

Propeller Shaft Replacement .

4. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .

5. Disconnect the park/neutral position (PNP) switch electrical connector (2).

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

Fig. 57: View Of Park/Neutral Back Up Switch
Courtesy of GENERAL MOTORS CORP.

6. Remove the manual shaft lever nut.

7. Remove the transmission control lever from the manual shaft.

8. Remove the PNP switch bolts.

9. Remove the PNP switch from the manual shaft. If the PNP switch did not slide off the

manual shaft, file the outer edge of the manual shaft in order to remove any burrs.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

Installation Procedure

Fig. 58: View Of Park/Neutral Back Up Switch
Courtesy of GENERAL MOTORS CORP.

1. Install the PNP switch to the transmission manual shaft by aligning the switch hub flats with

the manual shaft flats.

2. Slide the PNP switch onto the transmission manual shaft until the switch mounting bracket

contacts the mounting bosses on the transmission.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

3. Install the PNP switch bolts finger tight.

Fig. 59: Positioning J 41364-A Onto PNP Switch
Courtesy of GENERAL MOTORS CORP.

4. Install J 41364-A onto the PNP switch. See Special Tools. Ensure that the two slots on the

switch where the manual shaft is inserted are lined up with the lower two tabs on the tool.

IMPORTANT: If a NEW PNP switch is being installed, the switch will come

with a positive assurance bracket. The positive assurance
bracket aligns the new switch in its proper position for
installation and the use of the park neutral switch aligner will
not be necessary.

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