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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1780 (Rear Wheel Steering System) >> Diagnostic Information and Procedures >> DTC C0550: ECU Malfunction >> 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 number below refers to the step number on the diagnostic table.

  1. 2. This DTC requires rear wheel steering control module replacement.
    Fig 1: DTC C0550
    G01479925Courtesy of GENERAL MOTORS CORP.
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