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Service bulletin PIT6505

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11031515
Published by NHTSA2026-04-23
Manufacturer's numberPIT6505
Manufacturer's date2026-04-16
NHTSA componentUNKNOWN OR OTHER

NHTSA's summary

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.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Trouble codes named

P2B86, P2B87

Vehicles listed
CADILLAC ESCALADE2024, 2025, 2026
CADILLAC ESCALADE ESV2024, 2025, 2026
CHEVROLET SUBURBAN2024
CHEVROLET SUBURBAN 15002025, 2026 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET TAHOE2024, 2025, 2026
GMC YUKON2024, 2025, 2026
GMC YUKON XL2024, 2025, 2026

Listing a model year does not mean every vehicle of it is concerned: the document says which.