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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1788 (Automatic Transmission - 4L60-E/4L65-E (Diagnosis)) >> Diagnostic Information and Procedures >> DTC P0748 (5.3L): Pressure Control Solenoid Circuit Electrical >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. 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 - 5.3L (Steps 1-7)
G02131482Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P0748 - 5.3L (Steps 8-17)
G02131483Courtesy of GENERAL MOTORS CORP.
Fig 3: DTC P0748 - 5.3L (Steps 18-20)
G02131484Courtesy of GENERAL MOTORS CORP.
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