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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> 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 (PCS1 and PCS2) >> Installation Procedure

Installation 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: Exploded View Of PCS1 and PCS2 Components
    GM1633279Courtesy of GENERAL MOTORS CORP.
  1. Obtain the new solenoid (1) or (8). Lubricate new O-ring (2) or (7) with clean transmission fluid. Install the O-ring and push the new solenoid into the control valve body bore with the wiring harness connector in the correct position.
  2. Install the 2 accumulators (3) and springs (6) before installing the pressure control valve retaining bracket (5). The valve (3) goes in the bore first with the hollow end facing outward, followed by the spring (6) which goes inside the hollow portion of the valve.
    3. NOTE: Refer to Fastener Notice .
  3. Install the pressure control valve retaining bracket (5), and install the 3 bolts (4).

    Tighten:  Tighten the bolts to 12 N.m (108 lb in).

    4. Fig 2: Reverse Signal Pipe Bolts
    GM1633276Courtesy of GENERAL MOTORS CORP.
  4. Install the reverse signal pipe. Install the 2 bolts that fasten reverse signal pipe to the control valve assembly.

    Tighten:  Tighten the bolts to 12 N.m (108 lb in).

  5. Reconnect the internal wiring harness to the solenoid.
  6. Install the oil pan and transmission internal oil filter. Refer to Oil Pan Replacement .
    7. IMPORTANT: The FastLearn, adapt, procedure must be performed. This can be done in 1 step using a scan tool. If this procedure is not done, the TCM adaptive values will be at the settings that it learned for the old components and will be in slow adaptive mode. Under these conditions, it will take an unacceptably long time for the adaptive values to converge to levels suitable for the new transmission.
  7. Perform the FastLearn procedure. Refer to FastLearn Procedure .
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