03 LB7 Duramax, Tell me what I need!
Diesel Fan
Joined: Jul 2010
Posts: 19
Likes: 0
From: Marshall, WI
thats def true idk i never tried the fuel upgrade i have a fass system but would still like to tackle it sometime soon.
Newbie
Joined: Jan 2009
Posts: 4
Likes: 0
Go with some EFI tuning, lift pump...I would recommend a air dog for the extra filters, S&B intake will be your best bet for the price, 4" or 5" exhaust..4 is fine though, some gauges to watch it all and you should be set. If you want to get a little bit more into it, upgrade your transmission so you can put more then 90 extra horses on it, and get your front end solid. From there you can call it good
Diesel Fan
Joined: Jul 2010
Posts: 71
Likes: 5
From: Colorado
I just purchased a 2003 GMC Sierra 2500HD extended cab. It has 195,000 miles on it and is bone stock. It runs like a top, the Allison shifts smooth as can be, and looks like it just came off of the show-room floor. It has never pulled a thing in it's life, but that is about to change. I won't be pulling huge loads, just a stock trailer with some calves in it about once a month. I am wanting to do a little bit to the truck, not necessarilly for the pulling, nothin too ridiculous though. I've heard good things about a PPE programmer or maybe the ATS. I am putting a 4 inch straight pipe on it and probably will get a cold air intake. It would be nice to be able to roll some smoke too. I'm just looking for a little advice from anyone that is willing to give it.
If all you want is to hear the turbo whine plug the resonator off.
For just towing don't add too much more power unless you plan on upgrading the TC and Transmission.
When the front steering wears out upgrade it if you plan on keeping the truck for awhile. I recommend exaxt because that is what I used. I haven't had the alignment adjusted in over 50k and that is with driving on washboarded gravel roads all the time.
Search for transfer case rub. Read the horror stories then order a kit to fix it.
Save up for when the injectors go bad. They will. It is a matter of when not if.
Diesel Fan
Joined: Jul 2010
Posts: 19
Likes: 0
From: Marshall, WI
[QUOTE=bftrain;593365]I modified my air box (kennedy) and now my filter just plugs with bugs and snow when it is falling.QUOTE]
wow iv never heard of that i have no problems with it mine works great. im also pushing a 125 hp over stock right now and my tranny is still holding up so i mean you dont really have to worry about that right now those allisons can take a lot. but i would at least look at putting tie rod sleeves in there relatively inexpencive and help out your front end alot.
wow iv never heard of that i have no problems with it mine works great. im also pushing a 125 hp over stock right now and my tranny is still holding up so i mean you dont really have to worry about that right now those allisons can take a lot. but i would at least look at putting tie rod sleeves in there relatively inexpencive and help out your front end alot.
