GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2006 🢒 Yukon - 4WD 🢒 Brakes 🢒 Antilock Brake System 🢒 Traction Off Indicator Inoperative

Circuit Description

The instrument panel cluster (IPC) illuminates the traction off indicator by supplying ground to the lamp. The electronic brake control module (EBCM) sends serial data messages to the IPC to command the indicator ON or OFF.

Diagnostic Aids

Replace the IPC if the traction off indicator intermittently fails to illuminate during the bulb check.

Test Description

The number below refers to the step number on the diagnostic table.

  1. This step tests if the IPC is able to illuminate the traction off indicator during the bulb check.

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

  1. Turn OFF the ignition for 5 seconds.
  2. Turn ON the ignition while observing the traction off indicator.

Does the traction off indicator illuminate?

Go to Diagnostic Aids

Go to Step 3

3

Replace the instrument panel cluster (IPC). Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 4

--

4
  1. Turn OFF the ignition for 5 seconds.
  2. Turn ON the ignition while observing the traction off indicator.

Does the traction off indicator illuminate?

System OK

Go to Step 3