Test Description

WARNING: This page is about a different car, the 2006 GMC Sierra, 2006 GMC Cab & Chassis Sierra, 2006 Chevrolet Silverado, and 2006 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.

3: This step tests if the IPC is able to turn OFF the ABS indicator.

ABS Indicator Always On

Step	Action	Yes	No
IMPORTANT: After a wheel speed sensor DTC is cleared and the ignition is ON, the antilock brake system (ABS) indicator may remain ON until the electronic brake control module (EBCM) completes a power-up self test. This test concludes when the vehicle reaches a speed greater than 13 km/h (8 mph) and the wheel speeds are verified by the EBCM.
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Turn OFF the ignition for 5 seconds. Turn ON the ignition while observing the antilock brake system (ABS) indicator. Does the ABS indicator illuminate for 2 seconds and then turn OFF?	Go to Diagnostic Aids	Go to Step 3
3	Install a scan tool. Select the instrument panel cluster (IPC) Special Functions menu on the scan tool. Command the ABS Lamp OFF. Does the ABS indicator turn OFF?	Go to Step 5	Go to Step 4
4	Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement?	Go to Step 6	-
5	Replace the electronic brake control module (EBCM). Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement?	Go to Step 6	-
6	Turn OFF the ignition for 5 seconds. Turn ON the ignition while observing the ABS indicator. Does the ABS indicator illuminate for 2 seconds and then turn OFF?	System OK	Go to Step 3