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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1035 (Automatic Transmission - ALLISON - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> On-Vehicle Repair Information >> Control Valve Solenoid Replacement (SS1, SS2, SS3, TCC, and MAIN MOD) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Locating Shift Solenoid
    GM1331386Courtesy of GENERAL MOTORS CORP.
  1. Remove the oil pan and the transmission internal oil filter. Refer to Oil Pan Replacement .
  2. Disconnect the internal wiring harness from the solenoid being changed.
  3. Remove the solenoid retainer (2) for shift solenoid 1 (SS1) (5). Note the position of the solenoid connector and pull the solenoid (5) out of the bore in the control valve assembly (1). The O-rings (3 and 4) provide the resistance felt during removal.
    4. Fig 2: Identifying Control Valve Solenoids
    GM1633277Courtesy of GENERAL MOTORS CORP.
  4. Remove the solenoid retainer (6) for shift solenoid 2 (SS2) (1) or shift solenoid 3 (SS3) (4), whichever is being replaced.
  5. Note the position of the solenoid connector and pull the solenoid out of the bore in the control valve assembly. The O-rings (2 and 3) provide the resistance felt during removal.
    6. IMPORTANT: The TCC pressure control solenoid (PCS) retaining bracket must not be modified. Note that the angle between the 2 bracket surfaces is less than 90 degrees. Replace the bracket if the angle is 90 degrees or greater.
  6. Remove the TCC PCS retaining bolt and retaining bracket.
  7. Remove the TCC PCS (7).
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