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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1242 (Antilock Brake System) >> Diagnostic Information and Procedures >> DTC C0121: Valve Relay Circuit Malfunction >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to step number on the Diagnostic Table.

  1. 2. This step determines if the DTC is current.
Fig 1: DTC C0121
G01490638Courtesy of GENERAL MOTORS CORP.
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