Chevrolet Silverado / GMC Sierra. Service manual — part 1058

Fig. 125: Identifying Valve Body Electrical Connections
Courtesy of GENERAL MOTORS CORP.

4. Disconnect the internal wiring harness electrical connectors from the following components:

The transmission fluid pressure manual valve position switch (1)

The 1-2 shift solenoid (2)

The 2-3 shift solenoid (3)

The pressure control solenoid (4)

The TCC PWM solenoid (5)

The 3-2 shift solenoid (6)

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 126: View Of TCC PWM Solenoid & Retainer
Courtesy of GENERAL MOTORS CORP.

5. Remove the TCC PWM solenoid retainer (2) with a small screwdriver.

Rotate the solenoid (1) in the bore, if necessary, until the flat part of the retainer (2) is
visible.

6. Remove the TCC PWM solenoid (1) in order to access the TCC solenoid bolts.

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 127: View Of TCC Solenoid Retaining Bolts
Courtesy of GENERAL MOTORS CORP.

7. Remove the TCC solenoid bolts.

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 128: View Of TCC Solenoid & Wiring Harness
Courtesy of GENERAL MOTORS CORP.

8. Remove the TCC solenoid (with O-ring seal) and wiring harness from the valve body.

9. Reposition the harness to the side of the transmission case.

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado