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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1740 (Automatic Transmission - ALLISON - DTC P0880 To DTC P2771) >> DTC P0881 >> 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.
    NOTE: You must perform the Circuit/System Testing first.
  1. Ignition OFF, and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Disconnect the harness connector at the TCM.
  2. Test for less than 3 ohms between ground circuit terminal 9 and battery ground, and between ground circuit terminal 69 and battery ground.
    • If greater than the specified range, repair the affected ground circuit.
  3. Verify that a test lamp illuminates between battery B+ circuit terminal 10 and ground, and battery B+ circuit terminal 70.
    • If the test lamp does not illuminate, repair the affected B+ circuit.
    • If circuits test normal, replace the TCM.
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