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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1305 (Cruise Control System) >> Diagnostic Information and Procedures >> DTC 021 >> Test Description

Test Description

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

2. This step tests for a short to ground or an open condition in the PPL/WHT wire which supplies VSS signal voltage to the cruise control module.

3. This step tests for a short to ground in the PPL/WHT wire which supplies VSS signal voltage from the instrument cluster assembly to junction block 3

Fig 1: DTC 021 Diagnostic Specifications
G01434244Courtesy of GENERAL MOTORS CORP.