The rear half shaft boot on the left side of some 2021-2025 Tahoe, Suburban, Yukon and Escalade models may be leaking or damaged. The damage may have occurred due to the brake pad wear sensor being incorrectly routed, resulting in contact with the half shaft boot. (Fig. 11)
Fig. 11
TIP: Only the left rear brake caliper is equipped with a disc brake pad wear sensor.
Check the clearance from the half shaft outboard joint to the wiring harness. The clearance should be higher than 10mm. (Fig. 12, #1) If the clearance is under 10mm (Fig. 12, #2), install the revised bracket that is available. The new bracket will reroute the brake pad wear sensor so that it is more than 10mm away from the half shaft boot.
Fig. 12
Refer to Rear Disc Brake Pad Wear Sensor Replacement in the appropriate Service Information for instructions on accessing the left-side rear brake pad war sensor bracket. Remove the connector and bolt from the bracket (Fig. 13) and remove the tape around the wiring harness.
Fig. 13
After installing the new design bracket, insert a tie strap through the bracket hole and around the wiring harness. The tie strap buckle should be positioned above the wiring harness bundle. (Fig. 14)
Fig. 14
For more information and part numbers, refer to Bulletin #25-NA-109.
– Thanks to Mike Waszczenko
