Rick's Free Auto Repair Advice

ABS or TCS light on PIC5992A

Service bulletin PIC5992A for ABS or TCS light on

Diagnose and fix ABS or TCS light on

GM has issued a bulletin PIC5992A to address a ABS or TCS light on

caravan Rear wheel speed sensor

Rear wheel speed sensor

condition in the vehicles listed below. The ABS or TCS light on condition can occur more often when turning the vehicle. GM has determined a possible wire harness or water intrusion issue with these vehicles

Vehicles affected by PIC5992A:

2007 – 2013 Chevrolet Impala
2014 – 2016 Chevrolet Impala Limited
2007 – 2008 Pontiac Grand Prix
2007 – 2009 Buick Lacrosse

How to check wheel speed sensor wiring harness

Run a fingernail along the wiring harness from the wheel speed sensor back to the EBCM or nearest connector. If your fingernail reaches a shallow point, suspect a broken wire. Also, open the electrical connector to check for water intrusion.

The problem can occur most often where the wiring harness passes between the steering knuckle and the axle shaft.

If you detect a broken wire, it’s best to replace the harness rather than attempt a repair. However, if you have to do a repair, SOLDER the connection and protect with heat shrinkable tubing.

Posted on by Rick Muscoplat

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