# Service bulletin 3068 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. - Type: Service bulletin - NHTSA id: 10009606 - Published by NHTSA: 2004\-10\-08 - Manufacturer's number: 3068 - Replaces: 3068D - NHTSA component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER ## NHTSA's summary OIL SEEPAGE FROM TURBO AIR CHARGE COOLER HOSES OR HOSE BLOWING OFF DURING ACCELERATION. POSSIBLE DIAGNOSTIC TROUBLE CODE P0299. \*TT UPDATED 04\-24\-07. \*KB ## 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, Turbocharger or supercharger ## Trouble codes named P0299 ## Vehicles listed - 2004 to 2006 CHEVROLET EXPRESS - 2007 CHEVROLET EXPRESS 1500 - 2007 CHEVROLET EXPRESS 2500 - 2007 CHEVROLET EXPRESS 3500 - 2004 to 2007 CHEVROLET KODIAK - 2004 to 2006 CHEVROLET SILVERADO - 2007 CHEVROLET SILVERADO 1500 - 2007 CHEVROLET SILVERADO 2500 - 2007 CHEVROLET SILVERADO 3500 - 2004 to 2006 GMC SAVANA - 2007 GMC SAVANA 1500 - 2007 GMC SAVANA 2500 - 2007 GMC SAVANA 3500 - 2004 to 2006 GMC SIERRA - 2007 GMC SIERRA 1500 - 2007 GMC SIERRA 2500 - 2007 GMC SIERRA 3500 - 2004 to 2007 GMC TOPKICK - 2006 GMC TOPKICK 6500 - 2006 GMC TOPKICK 8500 ## Other bulletins for the same vehicles and component - [PIP4568Q](/bulletins/10111986.md), 2017-08-15, Service bulletin: ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. This Preliminary Information communication provides information to the technician that some vehicles may have a Service Engine Soon lamp, engine misfire on cylinder 1, 4, 6, or 7 and/or tick noise. Technician will follow service information diagnosis first. If service information diagnosis does not isolate the cause of this concern perform a cylinder deactivation active fuel management system compression test in service information. If the running compression of the misfiring cylinder stays below 25 Pounds per Square Inch regardless of the active fuel management solenoid being commanded on or off, an active fuel management lifter is mechanically collapsed/stuck or unlocking as soon as the engine is started. Replace all active fuel management lifters, and all plastic lifter guides. Also perform the cylinder deactivation active fuel management Valve Lifter Oil Manifold Diagnosis and Testing in Service Information. If it isolates a concern with the Valve Lifter Oil Manifold, replace it and reevaluate the concern. The active fuel management lifters can also be monitored for proper operation by carefully inspecting the cylinder 1, 4, 6, and 7 rockers and valves while cranking or briefly and safely running the engine with the valve covers removed. If the valve or valves of an active fuel management cylinder stop moving while doing this test, the active fuel management lifter is causing the concern. For 2008\-2009 Full Size Truck/SUV or a 2007\-2009 Chevrolet Tahoe with the Police Package reprogram the Engine Control Module. On the 2008\-2009 Pontiac G8, 2010\-2011 Camaro, and 2007\-2010 Full Size Trucks with active fuel management, also determine if the active fuel management pressure relief valve shield that is listed in the latest version of 10\-06\-01\-008 has ever been installed. On passenger cars with the LS4 engine, determine if the updated oil pan gasket that is listed in the latest version of 11\-06\-01\-007 has been installed. - [PIP\-4888](/bulletins/10038605.md), 2011-06-24, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. GM: INFORMATION ON INSPECTING AND REPLACING TURBOS. \*RM - [PIP\-4857](/bulletins/10037499.md), 2011-05-25, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER; FUEL SYSTEM, DIESEL. GM: THERE MAY BE REDUCED POWER AND AN INTERNAL TROUBLE CODE IN HIGH TEMPERATURES OR WHEN NEAR THE TOWING LIMIT. \*RM - [PIP\-4629](/bulletins/10030207.md), 2009-08-19, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. CHEVROLET/GMC: DIESEL ENGINE TURBO DTC P2563 OR P003A. MAY ENCOUNTER A CONCERN OF SES LIGHT, REDUCED POWER, LOW POWER. \*PE - [PIP\-4372B](/bulletins/10026650.md), 2008-11-25, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. GMC: OIL LEAK AT TURBOCHARGER AIR INTAKE PIPE. INITIAL INSPECTION MA REVEAL A LEAK THAT LOOKS AS IT IS COMING FROM THE REAR OF THE ENGINE. \*PE - [3401](/bulletins/10020072.md), 2006-07-19, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. TURBOCHARGER OIL FEED LINE KINKED OR RESTRICTED. \*TT - [3348](/bulletins/10014816.md), 2005-05-10, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. NOISE, SERVICE ENGINE SOON \(SES\) LIGHT, OR LOW POWER. DEALER MAY FIND TURBINE \(EXHAUST SIDE\) WHEEL RUB DAMAGE, A BROKEN TURBINE SHAFT, OR TURBO BEARING CONCERN. \*TT - [10292004](/bulletins/10013041.md), 2005-04-06, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. THIS IS IN REGARDS TO THE UNNECESSARY CHANGING OF TURBOCHARGERS DUE TO OIL SEEPAGE. \*TT - [01896](/bulletins/10006476.md), 2004-05-04, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. 6.6 LLY DURAMAX DIESEL ENGINE TURBOCHARGER LEARN PROCEDURE. \*MR - [001496A](/bulletins/10005513.md), 2004-03-02, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. THIS MESSAGE IS IN REGARD TO DURAMAX TURBOCHARGER NOISES OR POSSIBLY A PERFORMANCE OR FUEL ECONOMY COMPLAINT. SERVICE VME. 6.6 LB7 DIESEL ENGINE. P0102, P0103, P0236. \*TT JSON: [/v1/bulletins/10009606](/v1/bulletins/10009606) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%203068&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10009606&vehicle=Service%20bulletin%203068)