Information on the Upcoming Safety Recall 05068 Front Wheel Speed Sensor Corrosion - keywords ABS activation brake campaign sensor speed unwanted

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

Note: This Information is for United States Dealers only. Canadian Dealers Should See Safety Recall 04094 Dated January 2005

Based on information from the National Highway Traffic Safety Administration (NHTSA) web site, the media may report that General Motors will be announcing a safety recall involving certain 1999-2002 model year Chevrolet Silverado, Tahoe, Suburban and Avalanche and GMC Sierra, Yukon and Yukon XL vehicles.

These vehicles may experience unwanted antilock brake system (ABS) activation and increased stopping distances during low-speed brake applications (greater than 3.7 mph but less than 10 mph). This condition does not set any ABS codes nor does it illuminate the ABS warning lamp. This condition is more likely to occur in environmentally corrosive areas, based on field report data from the U. S. and Canada. Accordingly, this recall will be launched in the "rust belt" states of Connecticut, Illinois, Indiana, Massachusetts, Maine, Michigan, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont and West Virginia only.

To correct this condition, dealers are to remove the wheel speed sensor and thoroughly clean the wheel speed sensor mounting surface on the bearing, apply Zinc-X (rust inhibitor) to the cleaned surface, grease the mounting surface, reinstall the wheel speed sensor, and check the peak-to-peak output voltage to ensure the wheel speed signal is within specifications. These repairs will be made at no charge to the customer.

Approximately 804,000 vehicles are involved. GM is working with its suppliers to obtain the required parts as quickly as possible. Based on the anticipated schedule, we plan to begin notifying customers about this recall in November 2005.

GMVIS information for this recall will not be available until the recall bulletin is released to dealers in November 2005.

Do not attempt any repairs until Campaign 05068 is released.

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.