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Service bulletin 08-06-04-003C

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 id10138703
Published by NHTSA2018-05-29
Manufacturer's number08-06-04-003C
Manufacturer's date2014-08-28
NHTSA componentEQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)

NHTSA's summary

This informational bulletin advises of a new testing tool for EGR cooling pressure tester.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Equipment and accessories, Exhaust and emissions, Labels and manuals, EGR valve

Vehicles listed
CHEVROLET C SERIES2004 to 2009
CHEVROLET C45002004 to 2009
CHEVROLET C4500 NA2008
CHEVROLET C55002004 to 2008
CHEVROLET EXPRESS2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
CHEVROLET EXPRESS 15002006, 2007, 2008, 2009, 2010, 2011, 2012 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET EXPRESS 15002014 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET EXPRESS 25002006, 2007, 2008, 2009, 2010, 2011 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET EXPRESS 25002014 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET EXPRESS 35002006, 2007, 2008, 2009, 2010 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET EXPRESS 35002012 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET EXPRESS 35002014 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 15002002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 1500 HD2002, 2003, 2004, 2005 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 35002008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET T SERIES2004, 2005
GMC C SERIES2004 to 2006
GMC C45002004 to 2009
GMC C55002004 to 2009
GMC G SERIES2003
GMC GM2002
GMC SAVANA2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
GMC SAVANA 15002006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 (the catalog's model; the bulletin names a series or trim of it)
GMC SAVANA 25002006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 (the catalog's model; the bulletin names a series or trim of it)
GMC SAVANA 35002006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 15002002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 25002007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA DENALI2007, 2008, 2009, 2010, 2011, 2012, 2013 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA DENALI2015 (the catalog's model; the bulletin names a series or trim of it)
GMC TOPKICK2004 to 2013

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
08-06-04-003D2021-04-20. Service bulletin. New Tool Availability — EN-48974 – EGR Cooler Pressure Tester Adapter Set to Diagnose Duramax® Diesel Engine EGR Cooler Engine Coolant Leaks into Combustion Chamber
182872018-12-10. Service bulletin. 18287 - Special Coverage. On certain vehicles equipped with a 6.6L Duramax diesel engine (RPO LGH), the malfunction-indicator light (MIL) may illuminate due to soot build-up in the Exhaust Gas Recirculation (EGR) cooler. This special coverage covers the condition described above for a period of 10 years or 120,000 miles (193,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. Dealers are to replace the EGR cooler.
17-NA-1612018-05-21. Service bulletin. This technical bulletin provides a procedure for exhaust gas recirculation valve pipe replacement (EGR Bypass Pipe) due to the EGR cooler bypass pipe being crack.
10-06-01-008L2017-08-15. Service bulletin. This technical bulletin provides a procedure to correct the customers concern to replace the left side valve cover and active fuel management oil deflector to reduce oil consumption.
PIP5198A2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that may have Service messages in the Driver Information Center, Malfunction Indicator Lamp on, Erratic fluctuating engine oil pressure gauge, engine crank no start, and engine may run rough or misfire. Technician may find Diagnostic Trouble Codes. Technician should use published Service Information diagnostics for the Diagnostic Trouble Codes that are set. If the diagnosis does not lead to a resolution check for chafing of the engine wiring harness that is routed near the Exhaust Gas Recirculation Valve. Technician should repair any damaged wiring and fully seat the wire retaining harness. Also the technician should bend the Exhaust Gas Recirculation Valve gasket over to prevent a re-occurrence.
PIP5168C2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have a no crank concern. Technician will need to check the valve train for movement when the engine is cranked. If the valve train is not moving while the crankshaft is moving the front cover will need to be removed to inspect for a sheared cam sprocket locator pin. If the cam sprocket locator pin has sheared, replace the engine assembly. If the valve train is rotating during inspection, disconnect the Camshaft Position sensor and check if the engine will start. If the engine starts front cover will need to be removed to inspect for a sheared cam sprocket locator pin. If the cam sprocket locator pin has sheared, replace the engine assembly. If the engine does not start with the Camshaft Position sensor disconnected the follow published ?Engine Cranks But Does Not Run? diagnosis in Service Information. Also perform an Engine Compression Test and Cylinder Leakage Test in Service Information documents all results. If the Service Information procedures above isolate an engine mechanical concern then removed to inspect for a sheared cam sprocket locator pin. If the cam sprocket locator pin has sheared, replace the engine assembly.
143532017-02-03. Service bulletin. 14353 - SPECIAL COVERAGE. ON SOME VEHICLES, THE SERVICE ENGINE SOON LIGHT MAY ILLUMINATE DUE TO AN INOPERATIVE EXHAUST GAS RECIRCULATION (EGR) COOLER BYPASS VALVE. DEALERS ARE TO REPLACE THE EGR COOLER BYPASS VALVE.
16-NA-2122017-01-18. Service bulletin. THIS INFORMATION BULLETIN PROVIDE INFORMATION ON A NEW WAY TO LOOK AT NOX SENSOR READINGS AND EXHAUST TEMPERATURE DURING A DPF REGENERATION OR A REDUCTANT FLUID QUALITY TEST.
PB-157662016-06-22. Service bulletin. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-080604003-C2014-11-08. Service bulletin. GMC/CHEVROLET: ENGINES, WITH EGR SYSTEM, HAS LEAKAGE FROM EGR COOLER ENGINE COOLANT INTO THE COMBUSTION CHAMBER. MODEL 2002-15 SILVERADO, SIERRA, 2004-09 KODIAK C4500-C5500, TOPKICK C4500-C5500, 2006-15 EXPRESS, SAVANA. *PE