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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - DTC P0218 To DTC P2771) >> DTC P0787 or P0788 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using the J 44152  and the J 35616  , measure the resistance between the ignition 1 voltage circuit and the 3-2 SS valve circuit. The resistance should be between 20-32 ohms for the 3-2 SS valve.
    • If the resistance is not within the specified range, remove the affected solenoid.
  2. Disconnect the wiring harness connector from the affected solenoid. Measure the resistance of the affected control circuit. The resistance should be between 20-32 ohms for the 3-2 SS valve.
    • If the resistance is not within the specified range, replace the affected solenoid.
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