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Duramax First Generation: 2001-2004 (LB7) Discuss the first generation (2001-2004 LB7) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY. is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
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Old 11-19-2012, 11:04 PM   #1 (permalink)
Sparkplug Hunter
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White Smoke, limp mode

I have a 01 dmax and it throws a bunch of white smoke. I don't think its the injectors because im not making oil, and it runs just fine. Also, it goes into limp mode all the time. Usually when im pulling a trailer but sometimes it just does it for no reason. Lately there has been a little bit of transmission slipping and heating as well. I don't know if these problems are related or if i have alot to fix on my truck...

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Old 11-20-2012, 12:39 AM   #2 (permalink)
Low Boost
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white smoke=the injectors

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Old 11-20-2012, 12:43 PM   #3 (permalink)
LT. Dan
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Can you please fill out your signature line with your truck and it's modifications. This will help us better diagnose the problem.

Have you read the codes when the truck goes into limp mode?

Just because it's not putting fuel in the oil, doesn't mean the injectors are not bad.

Have you had the balance rates checked? How about a return rate test?
2012 F150 Lariat w/Ecoboost

Former truck was a 03 Chevy 2500HD w/ Duramax
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Old 11-20-2012, 09:03 PM   #4 (permalink)
Diesel Nut

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X2^^ Does it have a strong diesel odor?
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Old 11-22-2012, 11:43 PM   #5 (permalink)
Been everywhere
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X3^^ Mine wasn't "making oil" when the injectors went. Smoking white though.
Daniel / Big D *DPJug #14
2003Chevy 2500HD Crew Cab 4x4 D/A w/ 125k+ miles, sprayed Bedliner, B&W Turnover
2003 Chevy 2500HD Ex Cab D/A w/ 350k+ miles, Line X sprayed bedliner, 36 gal transfer tank, air foil, B&W Turnover w/ Fiver adp (bought new)
1994 Ford E350 Uhaul 17' box 7.3 diesel / auto 186k+ miles
Sold 1996 GMC 2500HD Ex Cab 6.5 TD w/ 343k+ miles, 3000lb adjustable overload springs, Ultimate sprayed bedliner (bought new)
K&N air filters & Optima batts in all and Prolong in the oil & trannys
2003 Hitchhiker II 30.5ft RLBG Fifthwheel w/ two slides

Previously owned 1994 Chevy 2500HD Ex Cab 6.5TD, put over 120k on it
Semper Fi Overcome & adapt

Last edited by Been everywhere; 11-23-2012 at 12:04 AM.
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Old 11-22-2012, 11:52 PM   #6 (permalink)
Diesel Apprentice
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I also had no fuel in the crankcase when my injectors were bad. Did have white smoke though, and it got worse and worse until I replaced them.
2002 GMC Sierra 2500HD (Green Goblin) CC/SB 4x4, Leveled, LB7/Ally, G80, 3.73 gears, Edge Juice w/ Attitude, custom 180 amp alternator, 285/75R16 Goodyear Wrangler Silent Armors, Autometer Ultra Lite Boost/Pyro gauges, Banks Big Head WG actuator, Turbo horn mod, MBRP 4" DP back exhaust w/5" black tip, Monroe Reflex shocks, high idle, All on brights, CAT fuel filter,PPE boost valve, Pioneer deck w/6.5" Pioneer door speakers and 12" JL Audio sub *SOLD*

1993 Chevy K3500 SRW 4x4 6.5TD NV4500 5 speed, 4.10 gears, all mechanical, no vacuum pump, no A/C, timing slightly advanced, non-EGR (factory), ARP head studs, Fel-Pro HG, new casting "updated" heads, 60G GPs, solid flywheel conversion

1984 GMC High Sierra 4x4 2500, J code 6.2 diesel, 700R4 trans
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Old 11-23-2012, 10:19 PM   #7 (permalink)
Diesel Nut
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white smoke could also be injector cups/head gasket maybe, and yea filling out your sig would be pretty helpful. This truck doesnt sound very healthy. Id say if it has a tune in it, itd be wise to turn it down some for starters.
02 4x4 GMC 2500HD D/A. Black on black. 5 inch MBRP turbo back to single stack, PPE standard. MA pump rub upgrade.
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