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Service bulletin 666507A

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 id615095
Published by NHTSA2000-12-27
Manufacturer's number666507A
Manufacturer's date1998-07-01
Replaces666507
NHTSA componentVEHICLE SPEED CONTROL:CRUISE CONTROL

NHTSA's summary

EXPERIENCING ENGINE SURGE, KNOCK, ROUGH IDLE, STALL, HARD START, AND DIAGNOSTIC TROUBLE CODE P1406. *TT

The document

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

Components

Throttle and cruise control

Trouble codes named

P1406

Vehicles listed
CHEVROLET S SERIES1995
CHEVROLET T SERIES1995
GMC S SERIES1995
GMC T SERIES1995

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