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Chevrolet Silverado / GMC Sierra. Manual - part 1065
Fig. 153: View Of TCC PWM Solenoid & Retainer
Courtesy of GENERAL MOTORS CORP.
20. Install the TCC PWM solenoid (1) to the valve body.
21. Install the TCC PWM solenoid retainer (2).
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
Fig. 154: Identifying Valve Body Electrical Connections
Courtesy of GENERAL MOTORS CORP.
22. Connect the internal wiring harness electrical connectors to 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)
23. Install the transmission filter. Refer to Automatic Transmission Fluid and Filter
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
Replacement.
24. Reset the TAP values. Refer to Transmission Adaptive Functions (TCM).
CONTROL AND SHIFT SOLENOIDS REPLACEMENT
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
Fig. 155: Identifying Valve Body Electrical Connections
Courtesy of GENERAL MOTORS CORP.
1. Remove the transmission filter. Refer to Automatic Transmission Fluid and Filter
Replacement.
2. Remove the 1-2 accumulator, if necessary. Refer to Accumulator Assembly, Spacer
Plate, and Gaskets.
3. Disconnect the internal wiring harness electrical connectors from the following components:
IMPORTANT: Removal of the 1-2 accumulator is necessary only if
servicing the pressure control solenoid.
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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