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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (Engine Controls - Self-Diagnostics - 8.1L) >> Diagnostic Tests >> DTC P0708: Transmission Range Switch (ALLISON A/T) >> Test Description

Test Description

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Sierra, 2002 GMC Savana Special, 2002 GMC Savana Camper Special, and 2002 GMC Savana. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers n the diagnostic procedures.

  1. 3

    This step tests PNP switch status.

  2. 4

    This step tests TCM input response.

  3. 5

    This step tests the wiring harness for opens or shorts.
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