TSB PIT5479H — Cadillac, Chevrolet and GMC Service bulletin

PIT5479H is a service bulletin filed with NHTSA by Cadillac, Chevrolet and GMC, covering 9 Cadillac, Chevrolet and GMC models across the 2014–2020 model years. NHTSA's summary reads: This Preliminary Information communication provides information to the technician about fluid leaking from the brake caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston.

NHTSA's file names Cadillac Escalade (2015–2020); Chevrolet Colorado (2015–2020); Chevrolet Silverado 1500 (2014–2018); Chevrolet Silverado 2500 (2015–2018); Chevrolet Suburban (2015–2020); Chevrolet Tahoe (2015–2020); GMC Canyon (2015–2020); GMC Sierra 1500 (2014–2018); GMC Yukon (2015–2020). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.

No. PIT5479H is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.

Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under PIT5479H, its date, and NHTSA's own summary from the public file.