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Service bulletin 3401

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 id10020072
Published by NHTSA2006-07-19
Manufacturer's number3401
Replaces3401A
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER

NHTSA's summary

TURBOCHARGER OIL FEED LINE KINKED OR RESTRICTED. *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, Turbocharger or supercharger

Vehicles listed
CHEVROLET ASTRO2005
CHEVROLET EXPRESS2001, 2002, 2003, 2004, 2005, 2006
CHEVROLET KODIAK2001
CHEVROLET KODIAK2003 to 2006
CHEVROLET SILVERADO2001, 2002, 2003, 2004, 2005, 2006
GMC SIERRA2001, 2002, 2003, 2004, 2005, 2006
GMC TOPKICK2003 to 2006
GMC TOPKICK 65002006
GMC TOPKICK 85002006

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
PIP-46292009-08-19. Service bulletin. CHEVROLET/GMC: DIESEL ENGINE TURBO DTC P2563 OR P003A. MAY ENCOUNTER A CONCERN OF SES LIGHT, REDUCED POWER, LOW POWER. *PE
33482005-05-10. Service bulletin. 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
102920042005-04-06. Service bulletin. THIS IS IN REGARDS TO THE UNNECESSARY CHANGING OF TURBOCHARGERS DUE TO OIL SEEPAGE. *TT
30682004-10-08. Service bulletin. 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
018962004-05-04. Service bulletin. 6.6 LLY DURAMAX DIESEL ENGINE TURBOCHARGER LEARN PROCEDURE. *MR
001496A2004-03-02. Service bulletin. 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
014962004-03-01. Service bulletin. 6.6L LB7 DURAMAX DIESEL TURBOCHARGER NOISES OR FUEL ECONOMY COMPLAINT. SERVICE VME. SIT BULLETIN 1401355. *TT
1008032004-01-22. Service bulletin. EXCESSIVE DURAMAX TURBOCHARGER WHINE NOISE OR POSSIBLY A PERFORMANCE OR A FUEL ECONOMY COMPLAINT. GM VOICEMAIL LOG. THIS INCLUDES 2003-2004 4500 AND 5500 TRUCKS. *TT
014002003-11-22. Service bulletin. 6.6L DURAMAX LB7 ENGINES WITH TURBOCHARGER SYSTEM WHINE NOISE. *TT
0625022002-11-08. Service bulletin. THIS IS IN REGARDS TO INSPECTION OF THE TURBO CARGER AFTER AN ENGINE FAILURE. *TT