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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 813 (Automatic Transmission - 4L80-E/4L85-E (Service & Replacement)) >> Diagnostic Information and Procedures >> DTC P0502: Low Vehicle Speed With High Engine Speed In Drive Gear Range >> Test Description

Test Description

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

  1. 3. This step tests the OSS assembly circuit.
  2. 4. This step tests the integrity of the OSS assembly.
    Fig 1: Diagnostic Trouble Code (DTC P0502) Table (Step 1-2)
    G02111985Courtesy of GENERAL MOTORS CORP.
    Fig 2: Diagnostic Trouble Code (DTC P0502) Table (Step 3-12)
    G02111986Courtesy of GENERAL MOTORS CORP.
    Fig 3: Diagnostic Trouble Code (DTC P0502) Table (Step 13-16)
    G02111987Courtesy of GENERAL MOTORS CORP.