Chevrolet Silverado / GMC Sierra. Manual — part 1049

Tighten: Tighten the bolts to 17 N.m (13 lb ft).

12. Install the catalytic converter pipe. Refer to Catalytic Converter Replacement (4.3L) or

Catalytic Converter Replacement (4.8L, 5.3L, 6.0L, 6.2L) or Catalytic Converter
Replacement (6.6L) .

13. Fill the transmission to the proper level with DEXRON® VI transmission fluid. Refer to

Transmission Fluid Check.

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

TORQUE CONVERTER CLUTCH VALVE AND SPRING REPLACEMENT

Removal Procedure

1. Remove the transmission filter. Refer to Automatic Transmission Fluid and Filter

Replacement.

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

2. Disconnect the torque converter clutch (TCC) pulse width modulation (PWM) solenoid

electrical connector.

3. Remove the TCC PWM solenoid retainer.

4. Remove the TCC PWM solenoid in order to access the TCC control solenoid bolts.

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado