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trackvs2wheels
Well-known member
07 classic LBZ here and I love the truck...plan on keeping her for many years to come given she only has 42k on her
What year duramax?
- Thread starter jhubs
- Start date
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Bowfisher
Well-known member
^X2 my 06 crew cab LT LBZ has disk brakes on all four. My truck is bone stock, but I've tossed around the idea of EFI live. What kind of fuel economy gains are people seeing with EFI live?
05 manual
I have a 05 (lly) with a 6spd manual with a afe air filter, afe inlet and straight piped with kennedy bypass for engine light. It has 4 way disks and rancho 9000 and airbags. Leveling kit with 255/80/17 bfg km2 mt's they work great in the snow as I have a deck and tow a two place ride on/ off and it is a dream to drive. Around town i get19 mpg and just shy of 21 on freeway unloaded. When pulling it inusuall never see under 15 unless in 4wd. I do like the interior of the 07 and up. I try not to go over 2000 rpm best mpg is around 1800 but i only see 63 mph. Its a truck and everything has treated me great. Dont get me wrong these things have big balls especially at WFO. Stay way from earlier dmax's as injectors amd head gaskets go out. 06 auto is one of the best trucks tho. If u dont want a clutch-
I have a 05 (lly) with a 6spd manual with a afe air filter, afe inlet and straight piped with kennedy bypass for engine light. It has 4 way disks and rancho 9000 and airbags. Leveling kit with 255/80/17 bfg km2 mt's they work great in the snow as I have a deck and tow a two place ride on/ off and it is a dream to drive. Around town i get19 mpg and just shy of 21 on freeway unloaded. When pulling it inusuall never see under 15 unless in 4wd. I do like the interior of the 07 and up. I try not to go over 2000 rpm best mpg is around 1800 but i only see 63 mph. Its a truck and everything has treated me great. Dont get me wrong these things have big balls especially at WFO. Stay way from earlier dmax's as injectors amd head gaskets go out. 06 auto is one of the best trucks tho. If u dont want a clutch
-05 manual
I have a 05 (lly) with a 6spd manual with a afe air filter, afe inlet and straight piped with kennedy bypass for engine light. It has 4 way disks and rancho 9000 and airbags. Leveling kit with 255/80/17 bfg km2 mt's they work great in the snow as I have a deck and tow a two place ride on/ off and it is a dream to drive. Around town i get19 mpg and just shy of 21 on freeway unloaded. When pulling i usually never see under 15 unless in 4wd. I do like the interior of the 07 and up. I try not to go over 2000 rpm best mpg is around 1800 but i only see 63 mph. Its a truck and everything has treated me great. Dont get me wrong these things have big balls especially at WFO. Stay way from earlier dmax's as injectors amd head gaskets go out. 06 auto is one of the best trucks tho. If u dont want a clutch-
I have a 05 (lly) with a 6spd manual with a afe air filter, afe inlet and straight piped with kennedy bypass for engine light. It has 4 way disks and rancho 9000 and airbags. Leveling kit with 255/80/17 bfg km2 mt's they work great in the snow as I have a deck and tow a two place ride on/ off and it is a dream to drive. Around town i get19 mpg and just shy of 21 on freeway unloaded. When pulling i usually never see under 15 unless in 4wd. I do like the interior of the 07 and up. I try not to go over 2000 rpm best mpg is around 1800 but i only see 63 mph. Its a truck and everything has treated me great. Dont get me wrong these things have big balls especially at WFO. Stay way from earlier dmax's as injectors amd head gaskets go out. 06 auto is one of the best trucks tho. If u dont want a clutch
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^^ wish i could have found a manual dmax when i bought my 05, the manual trans makes a huge difference in fuel mileage over turning the big ol allison. my buddies got an 04 lb7 with the stick and he averages 20mpgs in town and he drives like a high school kid in a cummins. another buddy has the same truck except allison and he gets about 16-17 tops in town. plus its a lot cheaper to buy a good dual disc clutch than have an alli rebuilt when you decide to go cor the big power.
to some it up:
01-04 lb7 usually the best fuel economy but known for injector issues, but I've heard bosch finally has a set that will last. mechanicaly wastegated turbo, no emissions, good pistons weaker rods, 5spd alli, 01-02 had some issues with headgaskets and had worse tranny tuning with no o.d. lockout. these engines are rated around 310HP 520 ft lbs
04.5-05 lly same internals as lb7 but with different heads which move the injectors outside the valve covers, injector issues not a common issue any more, first year of the vvt turbo, egr, and pcv , still 5spd allison, these engines have an issue with overheating and also popping headgaskets, but it seems to be random in that some do and some don't. i had to replace my headgaskets at about 120k miles these trucks are rated around 310 HP 590ft lbs
06-07 classic lbz are like the holy grail of the dmaxs which is why they're still expensive. all the issues from the previous models were worked out, but don't have the emissions stuff on the newer trucks, slightly stronger rods, bigger cooling system, stronger 6spd allison with tap shift, rated around 360HP 650ft lbs. oh there was also an 06 lly which was the same as the lbz engine but detuned to lly power range.
07.5-10 lmm new body style, basically the same as the lbz but with emissions crap.
i don't have any experience with the lml so i won't comment other than they're rated around 397HP and upper 700s ft lbs for torque.
that's all i can think of off top of my head.
to some it up:
01-04 lb7 usually the best fuel economy but known for injector issues, but I've heard bosch finally has a set that will last. mechanicaly wastegated turbo, no emissions, good pistons weaker rods, 5spd alli, 01-02 had some issues with headgaskets and had worse tranny tuning with no o.d. lockout. these engines are rated around 310HP 520 ft lbs
04.5-05 lly same internals as lb7 but with different heads which move the injectors outside the valve covers, injector issues not a common issue any more, first year of the vvt turbo, egr, and pcv , still 5spd allison, these engines have an issue with overheating and also popping headgaskets, but it seems to be random in that some do and some don't. i had to replace my headgaskets at about 120k miles these trucks are rated around 310 HP 590ft lbs
06-07 classic lbz are like the holy grail of the dmaxs which is why they're still expensive. all the issues from the previous models were worked out, but don't have the emissions stuff on the newer trucks, slightly stronger rods, bigger cooling system, stronger 6spd allison with tap shift, rated around 360HP 650ft lbs. oh there was also an 06 lly which was the same as the lbz engine but detuned to lly power range.
07.5-10 lmm new body style, basically the same as the lbz but with emissions crap.
i don't have any experience with the lml so i won't comment other than they're rated around 397HP and upper 700s ft lbs for torque.
that's all i can think of off top of my head.
I have an EFI tune for fuel economy that gets me around 22 mpg empty and 19-20 loaded. I have 425 hp and just over 800 lbs torque...everything else is stock....it does what it needs to do and I dont see any reason for more mods...just wasting my money.
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Sledcrazy2014
Member
2012 gmc
I have had 03-04-05-06-07 dmax put all of them past 220k miles all these trucks me and brothers tuned bought them stock used mostly efi live
03-04 great trucks only problem was injected but were fixed under warranty
05 only lasted 3 months was a dog I think it was a lemon
06-07.5still have them awesome trucks good milage both have efi in them both pushing 200k miles
Now the truck of choice is hands down 2012
It has H and S tunner with all emission del
Walks away from all of these trucks and is 10 times quiter lot of fun to drive and very very little exhaust noise
It has a full 4 out the back 5 inch tip
Bought truck new and at 25 k put on h and s it was like waking up a sleeping grizzly
Hands down the lml is the best dmax
Just my 2cents
Sent from my iPhone using Tapatalk
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Sledcrazy2014
Member
Really good info in this thread - just going to add my experience
I bought a 2002 Ext Cab short box GMC - put about 140k on it before selling it. Neutral Safety Switch, Oil Pan Gasket (improperly installed at factory), and 1 set of injectors @ 70K were all covered under warranty and taken care of by the dealer. The truck was spot on and pulled great. It was probably due for another set of injectors when I sold it (told the guy that I sold it to). I would probably still have the truck if it would have been a crew cab.
Bought a 2011 GMC CCSB about two years ago since family was growing. I love everything about this truck except for the payments (0% financing helps on that end). The new frames are about 400lbs heavier if I remember right and the truck just feels way more solid. 36 gallon tank on the short box is awesome. I now have about 27k miles on it. Had one issue with the DEF Quality light coming on - other then that it has not been back to the dealer. Great truck IMO, new interiors look nicer, but I will get by with mine.
(Misc and useless tidbit - this is my first vehicle that did not come with a cassette player, my 2002 had one just above the cup holder that I never used)
I bought a 2002 Ext Cab short box GMC - put about 140k on it before selling it. Neutral Safety Switch, Oil Pan Gasket (improperly installed at factory), and 1 set of injectors @ 70K were all covered under warranty and taken care of by the dealer. The truck was spot on and pulled great. It was probably due for another set of injectors when I sold it (told the guy that I sold it to). I would probably still have the truck if it would have been a crew cab.
Bought a 2011 GMC CCSB about two years ago since family was growing. I love everything about this truck except for the payments (0% financing helps on that end). The new frames are about 400lbs heavier if I remember right and the truck just feels way more solid. 36 gallon tank on the short box is awesome. I now have about 27k miles on it. Had one issue with the DEF Quality light coming on - other then that it has not been back to the dealer. Great truck IMO, new interiors look nicer, but I will get by with mine.
(Misc and useless tidbit - this is my first vehicle that did not come with a cassette player, my 2002 had one just above the cup holder that I never used)
if your gonna be registering it in cache valley might wanna wait on the emissions delete til they figure out what the hell they're doin with the whole emissions testing bs they're being forced to implement here, unless youve heard something i haven't. i still haven't been able ta get a good answer on how exactly its gonna go, I've been tryin ta decide if I'm gonna have ta find a cat(or atleast something that appears to be a cat) for my '05i straight piped a few years back.
I have had a 06 duramax from 46k to 147k with some go fast parts and only issue was one tranny line leaked the mpg on this truck was 23mpg at 65mph..then i upgraded to an 2010 duramax with 6500 miles on it. I have put in EFI live (duramaxtuner) EGR delete pvc reroute kit, strait 4" duels with 8" tips, 22" incubus rims. I now have almost 70k and not a single problem, I love this truck. It pulls awsome, great mpg 21 at 65mph. I would definitely go with a 06-14 duramax if you decide on the newer (11-14 LML) Just call Duramax Tuner and they have the new EFI live thats 500 whp and almost 1000 ftlbs and thats with all emissions and stock exhaust and stock intake 
The little extra for the 06 and up trucks I think are worth it!!!
The little extra for the 06 and up trucks I think are worth it!!!
Not to be rude, but how did you manage to put that many miles on each of those trucks within a year?
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