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Service bulletin PIT6445B

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 id11026727
Published by NHTSA2025-12-22
Manufacturer's numberPIT6445B
Manufacturer's date2025-12-19
NHTSA componentUNKNOWN OR OTHER

NHTSA's summary

This PI communicates information that the Collision / Detection Systems will revert to default setting of Alert and Brake after an Ignition Cycle due to an Engineering change.

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.

Vehicles listed
BUICK ENCLAVE2026
CADILLAC ESCALADE2026
CADILLAC ESCALADE ESV2026
CADILLAC ESCALADE IQ2026
CADILLAC ESCALADE IQL2026
CADILLAC LYRIQ2026
CADILLAC OPTIQ2026
CADILLAC VISTIQ2026
CADILLAC XT42026
CHEVROLET COLORADO2026
CHEVROLET CORVETTE CONVERTIBLE2026 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET CORVETTE CONVERTIBLE E-RAY2026 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET CORVETTE COUPE2026 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET CORVETTE COUPE E-RAY2026 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET EQUINOX2026
CHEVROLET EQUINOX EV2026 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO EV2026 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN 15002026 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET TAHOE2026
CHEVROLET TRAVERSE2026
GMC ACADIA2026
GMC CANYON2026
GMC HUMMER EV PICKUP2026
GMC HUMMER EV SUV2026
GMC SIERRA EV2026 (the catalog's model; the bulletin names a series or trim of it)
GMC TERRAIN2026
GMC YUKON2026
GMC YUKON XL2026

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