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Service bulletin 990603010A

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 id623258
Published by NHTSA2001-10-26
Manufacturer's number990603010A
Manufacturer's date2001-06-01
Replaces990603010
NHTSA componentUNKNOWN OR OTHER

NHTSA's summary

DTCS B1001,B1271 OR B1780 SET WHEN REPLACING /REPROGRAMMING OTHER MODULES. (MODELS FROM 1999-2002 ALL PASSENGER CARS AND TRUCKS) *YH

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Trouble codes named

B1001, B1271, B1780

Vehicles listed
BUICK BUICK
CADILLAC CADILLAC
CHEVROLET CHEVROLET
GMC GMC
OLDSMOBILE OLDSMOBILE
PONTIAC PONTIAC

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