Am buying an 07 gmc crew lbz. Have been in an 05 cummins last 2 years some say the tow grunt is not as good as cummins, some say it is. I tow up to 16K at times in the hills . the duromax seems to have good power unloaded, does that power disapear with 15 K tied on ,or does it continue to pull hard.
Disapointed with an lbz?
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I've seen the loaded comparisons and the Duramax wins in all the contests.I've pulled a Cat 4x4 Hoe with a total weight of around 14-16000lb. and my truck did just fine.Thats with 35's and a 520 ft./lb. LB7.Impressed me!My brother has a 6.oh oh and it doesn't compare when we've hauled hay.Neither did my buddy's 04 Dodge.There isn't any flatland around here either.
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155 Posts
12,000
No dissapointment here, but only pulling 12,000# of fifth wheel. Drives up and over the cascade range in Oregon with no complaints. I did add the Hypertech programmer. Got used to the extra power that my 03 with the Hypertech had, but the Chipped LBZ is much better.
No dissapointment here, but only pulling 12,000# of fifth wheel. Drives up and over the cascade range in Oregon with no complaints. I did add the Hypertech programmer. Got used to the extra power that my 03 with the Hypertech had, but the Chipped LBZ is much better.
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A buddy and i pull about 30 to 35,000 pounds total weight from time to time and were lovin em out pullin fords with 7.3 and 6.0 no problem at all! As for a dodge no one has em around here that pull. Personally im a mechanic and worked on cummins in tractors and hate them.
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166 Posts
How many miles are on the truck? As it breaks in it will get more power.
The truck is a new 07 classic and i will not be programing or chipping it. going the stock route this time. I have had to many trucks with mods and i always regret it . Loud in cab, can't hear anyone ,lifts and vibes, chips and dealer problems, tires and burning up front ends, who needs it.
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3,707 Posts
I havent pulled as much as everyone else here, most is around 10k of logs for firewood but the truck never ran out of power in the hills and it held back good too when going downhill. A feind of mine has an 03 GMC that he tows his excavator with, trailer/machine combined weight around 14,500 and he goes over the road at 55mph with no problems and pulls the hills quite well.
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548 Posts
You should be plenty happy with the power of the LBZ unloaded and loaded. The only thing you'll be loosing when you add weight is more fuel 
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467 Posts
Once you've chipped a truck, you usually go back. I had the same feelings about chips and my new truck, but ended up with the EVO. Stock pulled well, chipped is crazy. I think I'm just going to leave it on level 1 ( around 100 lbs torque) and leave it. These trucks haul better than anything right now as far as I'm concerned and I couldn't care less about brands. Zero issues, two Duramax's. I tow 80% of my total mileage on truck.
sounds like the lbz pulls as well as the cummins but with a better tranny. Was a little concerned about it being a ( car motor in atruck). sounds wierd but a lot of motors that are not geared to being high torqe fall flat when loaded. plus i saw the video with the overheated lbz that could not keep up with the cummins.
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2,907 Posts
X2---I don't put that much weight on my C7500!!!!!On a pickup is a recipe for a disaster--it's insane.I've pulled some heavy,completely illegal loads with big rigs over the years in my more stupid days and remember all too well that puckering feel I was sitting on as I tried staying under control going downhill.maxy;1567261; said:
Heck Yeah! Mine is stock, I've tried programmers for a little bit, but I always regret it and take it back out after only a few days. Who really needs worse mpg, and the risk. 31,000 miles and still stock and loving it.hobbes2;1566564; said:
I use to have a Dodge twin turbo diesel that ran 11.86 at 114, yeah it was fun, but I'm glad it's gone. Never again.
LOL, funny! 6.6L with 650ft/lbs in a car! Actually, stock for stock, the LBZ outpulls EVERYTHING!!!!!! The Cummins is a great engine, but the LBZ will truly outpull it. I was a Cummins guy that went to the Dmax and absolutly DO NOT regret it. Here is a video of all 3 trucks stock. Check it out.hobbes2;1567220; said:
http://www.edmunds.com/apps/vdpconta...eoID=20091533/
Also check out this article, they do a hill shoot with modded and stock trucks! Duramax kicks @$$ with both modded and stock!!
http://www.the**********.com/features/pulloff2006c.htm
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