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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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05-07-2008, 03:27 PM
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eBay Motors
#1 (permalink)
| | Junior Member
Join Date: Mar 2008
Posts: 11
| Please help with Trans Error codes!
I just picked up my first duramax and on the drive home I felt a miss and the service engine soon light came on. Checked the codes:
1. P0380 glow plug error
2. P0700 Transmission Control Malfunction
3. P0734 4th Gear incorrect ration
Can anyone tell me what these all mean and possible fixes to them. thanks
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2002 Chevy 2500hd Ext. cab 4x4, Red, 4" exhaust no muffler | 
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05-07-2008, 03:30 PM
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eBay Motors
#2 (permalink)
| | Duramax Forum Supporter
Join Date: Oct 2007 Location: Greenville, KY
Posts: 1,090
| Did it go into limp mode, locked in 3rd gear?
What kind of driving conditions caused it to happen?
Did you check the tranny fluid level?
Do you know the last time the fluid and spin on filter was changed?
Does it have a programmer on it?
__________________ 05 Chevy LLY Crew Cab LT Dually 4x4, Crank it up Diesel Tie rod sleeves and centerlink, BD Diesel Remote Fuel Filter, EGR Blocked, PPE Hot+2 ET Xcellerator, TTS Dual Lift Pumps, FPRV Shim, Bullydog Outlook Monitor, AFE Stage 2 CAI, BD Diesel Manifold, Diamond Eye Turbo Direct Pipe, Diamond Eye 5" exhaust, Level Kit, Suncoast Stage IV w/ 1056 TC 
1981 VW Rabbit Pickup, 1.6L Diesel, 4 Speed Manual, 35 MPGs | |
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05-07-2008, 04:41 PM
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eBay Motors
#3 (permalink)
| | Junior Member
Join Date: Mar 2008
Posts: 11
| I was excellerating from about 30 to 55, not real hard but not easy with the truck empty no trailer. I believe it went into limp mode, felt like it was slipping, but I'm not sure what the limp feels like. I checked the fluid and its good, looks clean but I am not sure when the last time it was done, being I just purchased it. I don't think it has a programmer, nothing visible in truck or under hood, Dealer did not say anything about progammer.
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2002 Chevy 2500hd Ext. cab 4x4, Red, 4" exhaust no muffler | |
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05-07-2008, 05:57 PM
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eBay Motors
#4 (permalink)
| | DuramaxForum Fanatic
Join Date: Mar 2008
Posts: 332
| Check spin on filter,I always change mine every 10,000-15,000miles,need it or not.Fluid always bright red,looking good...
__________________ 2006 crew cab 4wd. LBZ 2500 hd,straight piped,resonator mod only so far,1978 Malibu 350/350 trans,3.73 rear,illegal like a MUG to drive on tha street now,2002 ex cab 1500 2wd. 5.3 liter w/superchip prog. ya know momma's grocery getter!!!Just added a Superchips Flashpaq,man,what a big diff,I was also shocked when I got 21.5 mpg while doing 55 of course.It is the easist to use,simple and 5 power settings,only around 300 bucks,get one it'll pay for itself in about three months...   | |
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05-07-2008, 08:02 PM
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eBay Motors
#5 (permalink)
| | Duramax Forum Supporter
Join Date: Oct 2007 Location: Greenville, KY
Posts: 1,090
| I would start with a fluid change and spin on filter and go from there. 4th gear is not the normal one to slip if the tranny was going out. Usually 5th is the one that will slip on you so maybe it's something simple.
__________________ 05 Chevy LLY Crew Cab LT Dually 4x4, Crank it up Diesel Tie rod sleeves and centerlink, BD Diesel Remote Fuel Filter, EGR Blocked, PPE Hot+2 ET Xcellerator, TTS Dual Lift Pumps, FPRV Shim, Bullydog Outlook Monitor, AFE Stage 2 CAI, BD Diesel Manifold, Diamond Eye Turbo Direct Pipe, Diamond Eye 5" exhaust, Level Kit, Suncoast Stage IV w/ 1056 TC
1981 VW Rabbit Pickup, 1.6L Diesel, 4 Speed Manual, 35 MPGs | |
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05-07-2008, 08:28 PM
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eBay Motors
#6 (permalink)
| | Junior Member
Join Date: Mar 2008
Posts: 11
| Ok I will start with that and go from there. Thanks for the info.
Any thoughts on the glow plug code. Truck did it again after I cleared it tonight.....
__________________
2002 Chevy 2500hd Ext. cab 4x4, Red, 4" exhaust no muffler | |
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05-07-2008, 08:35 PM
|
eBay Motors
#7 (permalink)
| | Duramax Forum Supporter
Join Date: Oct 2007 Location: Greenville, KY
Posts: 1,090
| Could be the glow plug module. Some of the trucks had a problem with it. also check all of the connections.
__________________ 05 Chevy LLY Crew Cab LT Dually 4x4, Crank it up Diesel Tie rod sleeves and centerlink, BD Diesel Remote Fuel Filter, EGR Blocked, PPE Hot+2 ET Xcellerator, TTS Dual Lift Pumps, FPRV Shim, Bullydog Outlook Monitor, AFE Stage 2 CAI, BD Diesel Manifold, Diamond Eye Turbo Direct Pipe, Diamond Eye 5" exhaust, Level Kit, Suncoast Stage IV w/ 1056 TC
1981 VW Rabbit Pickup, 1.6L Diesel, 4 Speed Manual, 35 MPGs | |
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05-07-2008, 08:35 PM
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eBay Motors
#8 (permalink)
| | Junior Member
Join Date: Mar 2008
Posts: 13
| make sure that the NSBU switch is pluged all the way in | |
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05-07-2008, 08:42 PM
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eBay Motors
#9 (permalink)
| | Junior Member
Join Date: Mar 2008
Posts: 11
| I will check the glow plug conections. Where exactly is the NSBU switch to check that??
__________________
2002 Chevy 2500hd Ext. cab 4x4, Red, 4" exhaust no muffler | |
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05-07-2008, 08:43 PM
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eBay Motors
#10 (permalink)
| | Duramax Forum Supporter
Join Date: Oct 2007 Location: Greenville, KY
Posts: 1,090
| the NSBU swith is on the driverside of the transmission and was bad about going out on that model. I forgot about it to tell you. That could be your problem, but most of the time you gear indicator would flash when it goes out.
__________________ 05 Chevy LLY Crew Cab LT Dually 4x4, Crank it up Diesel Tie rod sleeves and centerlink, BD Diesel Remote Fuel Filter, EGR Blocked, PPE Hot+2 ET Xcellerator, TTS Dual Lift Pumps, FPRV Shim, Bullydog Outlook Monitor, AFE Stage 2 CAI, BD Diesel Manifold, Diamond Eye Turbo Direct Pipe, Diamond Eye 5" exhaust, Level Kit, Suncoast Stage IV w/ 1056 TC
1981 VW Rabbit Pickup, 1.6L Diesel, 4 Speed Manual, 35 MPGs | |
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