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| 01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect |
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| | eBay Motors #1 (permalink) |
| Join Date: Jan 2009
Posts: 2
| My truck turns over but will not start My 03 Dmax problem started with my gauges not working intermittantly and then one day the didn't work at all all day.that evening when I went to start it, it cranked a little slow but it started. so I got on the freeway and realized my lights were dim and then the truck went into limp mode and wouldn't go over about 40 mph.so by the time I got off the next exit when I went to turn the corner the tranny did a couple of funny clunks and quit working. by then the engine was barely running so I shut it off. Batteries were totally dead by then. I had it towed home, disconnected the batteries and charged them. Now all it does is turn over and will not start.Gauges still don't work but engine turns over just fine. all other lights on dash work and I primed the pump so it seems to have fuel. The only code it gives me is P0380 for glow plug circuit A malfunction. but that doesn't explain the gauges not working and the batteries going dead. I also had the alternator tested and its good. What to do next ? Thanks. |
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| | eBay Motors #2 (permalink) |
| DuramaxForum Veteran Join Date: Mar 2011 Location: Missouri
Posts: 1,428
| Have the batteries tested.
__________________ 05 CCSB EFI Live by Kory Willis 76 Dodge Charger SE https://syntheticmotorsports.com/ |
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| | eBay Motors #3 (permalink) |
| Join Date: Jan 2009
Posts: 2
| Batteries are fine, It cranks over just fine. just won't start. |
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| | eBay Motors #4 (permalink) |
| Junior Member Join Date: Jun 2011 Location: Concord, NC
Posts: 26
| Do you have access to a scan tool to monitor fuel rail pressure sensor to see what the pressure is coming from the inj pump to the rail?
__________________ 2007.5 CCSB LTZ 4wd Loaded - Edge Race Evo Box Tuner - 4in. MBRP turbo back - 15% on all windows - GM accessory headrest DVD - GM factory Nav... Many hopes and dreams to come... Just a little somethin to tow the boat |
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| | eBay Motors #5 (permalink) |
| DuramaxForum Enthusiast Join Date: Apr 2012 Location: Pittsburgh Pa
Posts: 2,318
| You would think it would be the alternator if you we're losing charge where everything going dead.
__________________ 2006 2500 HD SLT ECLB, LBZ, Bilstein shocks,Banks 4inch exhaust, Alligator Adp Cat filter. And S&B air intake good to be driving a diesel again. 2002 Chevy silverado 2500 HD, LB7, traded it on a gasser and then traded it in for LBZ. |
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| | eBay Motors #6 (permalink) |
| Junior Member Join Date: Jun 2011 Location: Concord, NC
Posts: 26
| Yeah i would definatly agree with ya. If they died while driving it for sure points at a charging issue. But if you have the batterys fully charged and it still doesn't start then it's got something else going on...
__________________ 2007.5 CCSB LTZ 4wd Loaded - Edge Race Evo Box Tuner - 4in. MBRP turbo back - 15% on all windows - GM accessory headrest DVD - GM factory Nav... Many hopes and dreams to come... Just a little somethin to tow the boat |
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| | eBay Motors #7 (permalink) |
| Junior Member Join Date: Nov 2010
Posts: 149
| While your at it check if your primer button on the top of your fuel filter is hard to press. if its soft bleed some air out. Could be half of problem. Cranked it over so much to get it started drained your battery a bit. Just a thought.
__________________ 2006 Chevrolet Silverado 2500hd 6.6l LLY Duramax NADP Race Transmission & NAPC Built Transfer Case AFE Stage 2 Intake with Snow Performance Methanol Injection FASS 150gph Titanium Series Pump EFI Live PPE Race Valve & PPE Bored Fuel Rail Fitting Yukon Grizzly Locker with Mag-Hytec Cover & Traction Bars Leveling kit & 34.5" Hankook RT03 18" XD Rims HID's all around LED taillights and 3rd brake light Pioneer Double-DIN Touchscreen Navigation with Two 10" Subs under rear seat Autometer GM Match Fuel Pressure, Boost, and Pyro Gauges |
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| | eBay Motors #8 (permalink) |
| Super Moderator ![]() Join Date: Jun 2008 Location: So. Cal
Posts: 9,319
| Moving to LB7 for more support
__________________ Chevy 04.5 LLY, 2X, shell, XDR, MikeL 6spd, TransGo, deep pan, blocked, fingered, de-badged, PCV, 65 Gallon replacement Aero tank, PPE on 2, LBZ-mp, shimmed, Pre-fuel filter, tow mirrors, BU cam, gauges, GPS, Sirius, bags, custom grille, fender vents, HD trans cooler- Curt front hitch, footwell lights, load lights, Studs, head gaskets. |
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| | eBay Motors #9 (permalink) |
| Senior Member Join Date: Jul 2011 Location: Edwardsville IL
Posts: 598
| Whens the last time your fuel filter was replaced? These trucks hate when you dont replace that. If it were mine I would get two 5 gallon cans of diesel, pour them in the tank, and change the fuel filter. Just my $0.02 |
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