Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON.
- Apply and release brake pedal. Verify the brake stop lamps operate properly.
- If the brake stop lamps do not operate properly
Refer to Symptoms - Lighting .
- Go to next step: If the brake stop lamps operate properly
- If the brake stop lamps do not operate properly
- Verify that DTC C0131 is not set.
- If the DTC is set
- Perform the Brake Pressure Modulator Valve Pressure Sensor Calibration .
- Verify the DTC does not set.
- If the DTC sets, replace the K17 Electronic Brake Control Module with the Brake Pressure Modulator.
- Go to next step: If the DTC does not set
- All OK.
- Go to next step: If the DTC is not set
- All OK.