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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 708 (ANTILOCK BRAKE SYSTEM WITH TRACTION CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESTRACTION OFF INDICATOR ALWAYS ONTEST DESCRIPTION
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Test Description

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION 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.

  1. 3:  This step tests if the IPC is able to turn OFF the traction off indicator.
Traction Off Indicator Always On

Step Action Yes No
Schematic Reference: ABS Schematics 
Connector End View Reference: ABS Connector End Views 
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 for approximately 2 seconds and then turn OFF?		 Go to Diagnostic Aids Go to Step 3 
3 
  1. Select the instrument panel cluster (IPC) Special Functions menu on the scan tool.
  2. Select Lamp Tests.
  3. Command the IPC indicator lamps Off.
Does the traction off 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
  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 for approximately 2 seconds and then turn OFF?		 System OK Go to Step 3 
RENDER: 1.0x

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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.