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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1360 (Automatic Transmission - 4L60-E - Service, Removal & Installation) >> Diagnostic Information and Procedures >> DTC P0748: PC Solenoid Valve Duty Cycle Reached Its High Limit >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 2. This step tests the ability of the PCM to command the PC solenoid valve.
  2. 3. This step tests the PC solenoid valve and automatic transmission wiring harness assembly for incorrect resistance.
Fig 1: DTC P0748 (Steps 1 - 5)
G01953397Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P0748 (Steps 6 - 15)
G01953398Courtesy of GENERAL MOTORS CORP.
Fig 3: DTC P0748 (Steps 16 - 20)
G01953399Courtesy of GENERAL MOTORS CORP.
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