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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1615 (Transfer Case - NVG 261-NP2 (Two Speed Manual)) >> Diagnostic Information and Procedure >> Four-Wheel Drive Does Not Disengage >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis 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. Tests for proper ignition 3 voltage to the front axle actuator.
  2. 3. Tests for proper ground at the front axle actuator.
  3. 4. Tests the axle actuator control circuit and transfer case switch for a short to ground.
  4. 5. Tests the axle actuator control circuit for a short to ground.
Fig 1: Four-Wheel Drive Does Not Disengage (Steps 1-6)
G01481201Courtesy of GENERAL MOTORS CORP.
Fig 2: Four-Wheel Drive Does Not Disengage (Steps 7-11)
G01481202Courtesy of GENERAL MOTORS CORP.
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