For 1990-2009 cars

# ABS Traction Control And/Or Stabilitrak Lights On With No DTCs - keywords brake C0035 C0040 C0045 C0050 C0110 C0131 C0161 C0186 C0196 C0245 C0252 C0299 C0450 C0455 C0550 C0710 control EBCM IP IPC pump

Subject: | ABS, Traction Control And/Or Stabilitrak Lights On With No DTC's

Models: | 2008-2009 Buick Enclave

| 2007-2009 Cadillac Escalade, Escalade ESV, Escalade EXT

| 2009 Cadillac XLR

| 2007-2009 Chevrolet Avalanche, Silverado, Suburban, Tahoe

| 2009 Chevrolet Corvette

| 2007-2009 GMC Acadia, Sierra, Yukon, Yukon XL, Yukon Denali, Yukon Denali XL

| 2008-2009 Pontiac G8

| 2007-2009 Saturn Outlook

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

### Condition/Concern:

During normal diagnostics and/or repair verification technicians may find that the ABS light, Traction Control and/or Stabilitrak indicators may be on with no DTC's displayed by the EBCM. This condition may be due to the EBCM requiring a full power down to reset the diagnostic monitoring after a "Clear All DTC's" command has been performed with the Tech 2. Do not replace an EBCM for this condition, as this is NOT an internal EBCM hardware problem. This condition can typically be resolved by performing a full power down of the EBCM.

The following DTC's are applicable to this condition of "Lights On No DTC's": C0035, C0040, C0045, C0050, C0110, C0131, C0161, C0186, C0196, C0245, C0252, C0299, C0450, C0455, C0550, C0710, U0100, and U2142.

### Recommendation/Instructions:

Important: Follow the guidelines below when performing a TECH 2 DTC Clear Code Command Request. Do not replace an EBCM for this "Lights On No DTC's" condition.

1. Perform TECH 2 EBCM "Clear All DTC's" command. If not already performed.
2. After EBCM "Clear All DTC's" process is complete the EBCM Telltales may still appear.
3. Key Off Ignition, Remove Key, Open and Close the drivers door to turn off RAP (Retained Accessory Power) and wait at least 60 seconds.
4. Key On Ignition, Are the EBCM related Telltales still present?

• | If No Telltales and No DTC's, no further action is required.

• | If Yes Telltales and DTC present, follow the appropriate Diagnostic Trouble Code procedure.

• | If Yes Telltales and NO DTC present, operate the vehicle at speeds greater than 15 km/h (10 mph) to complete the self test. If vehicle is repaired the EBCM will turn off the indicators. If a DTC resets follow the appropriate Diagnostic Trouble Code procedure.

5. If telltales remain with NO DTC's after the drive cycle, then disconnect battery for at least 60 seconds and then reconnect. This will insure a complete power down of the EBCM. Turn Key on ignition and operate the vehicle at speeds greater than 15 km/h (10 mph) to complete the self test. Verify no telltales or DTC's reset.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.