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Duramax 6600 Discussion Forum for the Duramax 6600 Diesel Engine, including the LB7, LLY, LBZ, LMM & LML engine specific topics.

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Old 02-25-2004, 06:55 AM
Jimmie J Jimmie J is offline
Join Date: Feb 2004
Location: PA
Posts: 9

Hi all,

I have a 2001 GMC with the 6.6 Duramax. I love the truck and the power of the Dmax, when it runs. Around 80,000 miles the SES light came on and I experienced power fade above 2000 rpm. It was cold outside so I thought the fuel may have gelled but no
Old 02-25-2004, 09:35 AM
Posts: n/a


I read about the following new TSB on another forum...

#04-06-04-007 - (02/18/2004)

Service Engine Soon (SES) Light, P0087, P0093, P1093, Low Power, No Start, Hard Start, Fuel in Crankcase (Replace All Injectors -- New Strategy for High Fuel Return Rates)

2001-2004 Chevrolet Silverado
2003-2004 Chevrolet Kodiak C4500/C5500 Series
2001-2004 GMC Sierra
2003-2004 GMC Topkick C4500/C5500 Series with 6.6L Duramax
Old 02-25-2004, 12:49 PM
Posts: n/a

Jim I just traded my 01 in ...I had the samething happen after a fuel gell up ... I had found the fuel filter houseing was sucking air from the primer when you hit the go peddle for more then 1/8 mile..... it was fine most of the time empty ,but towing was a nightmare!!!! If you want email for my cell phone number and we can compare notes.....
Old 02-25-2004, 01:40 PM
j ray koster j ray koster is offline
Join Date: Jan 2004
Location: houston texas
Posts: 3

I have a 02 chevrolet 4X4 with the 6.6 & 60000 miles & had some power loss over last 5000 miles & then 2 dirty filters over 1500 mi or so. the next was a full oil pan over 40 miles. Found gallon or so of diesel algie in tank. sent injectors to local injector repair for flow test &results were 6 down to 50-60% flow & two bypassing to crankcase. what can I expect if I take it back to GM for warrenty?
Old 02-29-2004, 05:48 AM
mps007 mps007 is offline
Join Date: Nov 2000
Location: Levittown, NY USA
Posts: 278

Are these replacement Injectors redesigned ? - I have to send my 01 in to have them checked - I have a no start situation & they think it might be the injectors causing the problem ...

I want to make sure we nail this problem down...
2001 LT extended LWB 2500hd 4x4 - Duramax/Allison- Black w/ graphite leather -<br />ARE Cap - Ruff racks safari rack --Whelen safety strobes -westin nerf -Linex - Tekonsha sentinal -Wet okole seat covers - Westin brush guard , Piaa Drivers.. Xenarc HIDs & Kemnedy Light harness.. Jotto Computer desk, Crappy delco radio <br /> member #6330<br />Photos - <br />
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