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Service bulletin 02-06-04-037

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 id634786
Published by NHTSA2002-10-09
Manufacturer's number02-06-04-037
Manufacturer's date2010-01-01
ReplacesSB-020604037H
NHTSA componentUNKNOWN OR OTHER; ENGINE AND ENGINE COOLING:ENGINE

NHTSA's summary

SOME CUSTOMERS WHOSE VEHICLES ARE OPERATED IN DUSTY TYPE ENVIRONMENTS, SUCH AS FARMING OR MINING OFF-ROAD TYPE APPLICATIONS, MAY COMMENT ABOUT THE ILLUMINATION OF THE INSTRUMENT PANEL SES LIGHT, WITH DIAGNOSTIC TROUBLE CODE P0446 SET. *TT UPDATED 7/11/08. *NJ UPDATED 11/5/10. *PE

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

Trouble codes named

P0446

Vehicles listed
CHEVROLET SILVERADO1999, 2000, 2001
CHEVROLET SILVERADO2007
CHEVROLET SILVERADO 15002008 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002008 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 35002008 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA1999, 2000, 2001
GMC SIERRA2008
GMC SIERRA 15002007 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 25002007 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 35002007 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA CLASSIC2007 (the catalog's model; the bulletin names a series or trim of it)

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

Recalls for the same vehicles and component
20073632007-11-09. Engine
07V5210002007-11-07. ENGINE AND ENGINE COOLING

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
03-06-01-023I2025-01-17. Service bulletin. This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
03-06-01-023H2024-11-14. Service bulletin. This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
04-06-04-051J2024-10-31. Service bulletin. This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
09-06-04-026Y2024-09-05. Service bulletin. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
01-06-01-011P2024-09-05. Service bulletin. This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
16-NA-3832024-07-16. Service bulletin. This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
15-00-89-004G2024-05-15. Service bulletin. This service bulletin provides technicians with information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
PI0652A2024-04-29. Service bulletin. Information on Removing Seized Exhaust Temperature Sensors.
16-NA-3832024-03-19. Service bulletin. This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
06-06-01-019C2024-03-19. Service bulletin. This bulletin advises the technician of possible location of an internal coolant leak from a specific cylinder head and location.