Chevrolet Silverado / GMC Sierra. Service manual — part 1071

4. Install the pressure control solenoid (377).

5. Install the pressure control solenoid retainer (378) and retainer bolt (364A).

Tighten: Tighten the bolt to 11 N.m (97 lb in).

Fig. 175: View Of TCC PWM Solenoid & Retainer
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: When installing the pressure control solenoid, the electrical

connector must be in the position 1 shown. Do not use
position 2.

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

6. Install the TCC PWM solenoid to the control valve body.

7. Install the TCC PWM solenoid retainer.

Fig. 176: Identifying Valve Body Electrical Connections
Courtesy of GENERAL MOTORS CORP.

8. Connect the internal wiring harness electrical connectors to the following components:

Transmission fluid pressure switch (1)

1-2 shift control solenoid (2)

2-3 shift control solenoid (3)

Pressure control solenoid (4)

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

TCC PWM solenoid (5)

3-2 control solenoid (6)

9. Install the 1-2 accumulator. Refer to Accumulator Assembly, Spacer Plate, and Gaskets.

Fig. 177: View Of Transmission Harness 20-Way Connector & VSS Electrical
Connector
Courtesy of GENERAL MOTORS CORP.

10. Connect the transmission harness 20-way connector (1) to the transmission pass-through

connector.

Align the arrows on each half of the connector and insert straight down.

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

11. Install the transmission filter. Refer to Automatic Transmission Fluid and Filter

Replacement.

12. Reset the TAP values. Refer to Transmission Adaptive Functions (TCM).

ACCUMULATOR ASSEMBLY, SPACER PLATE, AND GASKETS

Tools Required

J 25025-B Dial Indicator Post and Guide Pin Set. See Special Tools.

J 36850 Transjel Lubricant. See Special Tools.

Removal Procedure

IMPORTANT: It is recommended that transmission adaptive pressure (TAP)

information be reset.
Resetting the TAP values using a scan tool will erase all
learned values in all cells. As a result, the engine control
module (ECM), powertrain control module (PCM) or
transmission control module (TCM) will need to relearn TAP
values. Transmission performance may be affected as new
TAP values are learned.

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado