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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1736 (Automatic Transmission - 6L45/6L50/6L80/6L90 - DTC P0976 To DTC P2771) >> DTC P2534 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X1 16-way harness connector at the T12 automatic transmission assembly.
  2. Ignition OFF, test for less than 5 ohms on the vehicle harness connector X1 terminal 5 and ground at the transmission case.
    • If greater than then specified valve, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates at connector X1 vehicle harness side and the following terminals:
    • Terminal 4 and ground at the transmission case
    • Terminal 12 and ground at the transmission case
    • If the test lamp does not illuminate on any circuit, test the ignition or B+ circuit for a short to ground or an open/high resistance.
  4. If all circuits test normal, replace the Q8 control solenoid valve assembly.
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