Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 13 (ANTI-LOCK BRAKE SYSTEM - 4WAL)DIAGNOSTIC TESTSDTC C0267 OR DTC C0268: PUMP MOTOR CIRCUIT OPEN/SHORTED
1999 GMC Forward Control 5.7 R, Automatic
DTC C0267 Or DTC C0268: Pump Motor Circuit Open/Shorted
1999 GMC Forward Control 5.7 R, AutomaticSECTION DTC C0267 Or DTC C0268: Pump Motor Circuit Open/Shorted
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2001 GMC Savana Special, 2001 GMC Savana Camper Special, 2001 GMC Savana, 2001 Chevrolet Chevy Express, and 2000 GMC Savana Special. However, it is still accessible from the selected car via links, so may be relevant.
- Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK under DIAGNOSIS & TESTING. After performing diagnostic system check, go to next step.
- Using scan tool, clear DTC(s), then perform ABS motor test. Recheck DTCs. If DTC resets, go to next step. If DTC does not reset, problem is intermittent.
- Turn ignition off. Disconnect 2-pin pump motor connector from EBCM. Install Connector Test Adaptor Kit (J-35616-A) in order to connect test light between pump motor circuits at EBCM pump motor connector. Turn ignition on. Using scan tool, clear DTC and command ABS pump motor on and off. If test light turns on and off with each command, go to next step. If test light does not turn on and off with each command, go to step 5 .
- Check for poor connections at pump motor pigtail connector. Repair as necessary. After repairs, go to step 7 . If connections are okay, go to step 6 .
- Replace EBCM and perform tire size calibration using scan tool. After replacing EBCM, go to step 7 .
- Replace BPMV. After replacing BPMV, go to next step.
- Turn ignition on. Recheck DTCs. If DTC resets, go to step 2 . If DTC does not reset, system is okay.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.