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Service bulletin 031103

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 id10001905
Published by NHTSA2003-07-25
Manufacturer's number031103
Manufacturer's date2003-03-11
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

INTERFERENCE , SUCH AS ALTERNATOR WHINE, IS HEARD THROUGH THE RADIO SPEAKERS ON VEHICLES EQUIPPED WITH THE UP LEVEL BOSE RADIO SYSTEM. *TT *JB

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

Electrical system

Vehicles listed
CHEVROLET CHEVROLET
GMC GMC

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