CADILLAC, CHEVROLET, GMC

PIT6505

2026-04-16 · NHTSA 11031515

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Manufacturer summary

Original wording in English

This preliminary information communicates an issue with an SES MIL DTC P2B87 and/or P2B86 cause by the Aux heater coolant pump have an unwanted oring stuck in the pump. Dealers are to remove oring and reinstall pump.

Repeated filings are grouped only when make, bulletin number, publication date and complete summary agree. Original record numbers are retained. Older publications remain available, and an explicit later version is shown when established. Pre-1994 vehicle associations are separated from default results; an unspecified year does not mean all model years apply.