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Service bulletin 030602007

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 id10004303
Published by NHTSA2003-12-02
Manufacturer's number030602007
Manufacturer's date2003-09-01
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM

NHTSA's summary

LOSS OF COOLANT. *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

Engine, Cooling system

Vehicles listed
CHEVROLET AVALANCHE2003
CHEVROLET SILVERADO2003
CHEVROLET SUBURBAN2003
GMC SIERRA2003
GMC YUKON XL2003

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

Other bulletins for the same vehicles and component
31212004-11-08. Service bulletin. EXHAUST VIBRATION RESONANCE OR MOAN IN VEHICLES WITH GEN III V8 ENGINES. *TC
30722004-10-13. Service bulletin. THE ENGINE COOLANT TEMPERATURE OR INTAKE AIR TEMPERATURE SENSOR MAY READ -40 DEGREES WHEN MONITORED WITH TECH 2. *TT
020132004-05-26. Service bulletin. COOLANT LEAK FROM HEAD CUP PLUGS ON GEN III ENGINES. *MR
100120032004-05-06. Service bulletin. BLUEHEAT COOLANT HEATER THERMO TOP C. WEBASTO. *MR
030632004-02-24. Service bulletin. 03063 - OBD SYSTEM SOFTWARE UPGRADE - ON-BOARD DIAGNOSTIC (OBD) SYSTEM SOFTWARE UPGRADE - DIAGNOSTIC TROUBLE CODE (DTC) P0128 ENGINE COOLANT TEMPERATURE BELOW THERMOSTAT REGULATING TEMPERATURE. *TT