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DTC C1248: Dynamic Rear Proportioning (DRP) Circuit Malfunction ("W" Body)

  1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING. After performing diagnostic system check, go to next step.
  2. Install scan tool. Turn ignition on, with engine off. Select display DTCs function on scan tool for the EBCM. If scan tool displays any ABS/TCS DTCs, diagnose affected DTCs. If no ABS/TCS DTCs are displayed, go to next step.
  3. Using scan tool, clear DTCs. Recheck DTCs. If DTC resets, go to step  2. If DTC does not reset, problem is intermittent.
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