LowKeyIdiots

Very true thats why i came here! Just trying to sort this blasted chunk of metal out lol the whole thing is worth 7 grand and ive put 3 into it plus the 5 i paid for it lol

Entertainment? GOT THAT RIGHT!! haha what you said here makes more sense to me, i still have a headache now (as you said lol) but i read it like 5 times and i think i kinda get it, ill have to do some more reading on the subject to really grasp it, but thanks for the info!

So it seems as if it should always be in 4wd, now there is a fuse labelled (automatic transfer case) and another one labelled (4wd) i was told that the atc fuse will cut power to the trans case so it cant shift and the 4wd does the same thing only to the diff. I think im gonna jack it up later and see if i have a broken axle, im starting to wonder if the axle splines are sheered off and thats why when in the air the wheels spin but on the ground they dont. I was told it had a brand new T case when i bought it cause an old man owned it in florida. Thanks for you help!

wow pretty sure i had a stroke reading this lmao, i understood a sentence or two then i was lost then i new what you were saying again and so forth lmao, i dont really know much about tuning im trying to learn it all, so what your saying it more timing = more mpg's while cruising and less is more power? jeez im confused lmao, i have horrendous mpg as it is! lmao what i know so far about tuning (which isnt much) i learned from Jeremy Formato at Fasterproms i guess he is some type of tuning wizard or something

Thanks for the link! From what ive read having the awd disabled should help mpg and performace because its not sending power to the front wheels so the motor doesnt have to work as hard to turn the rears.... thats the theory anyway! i should also note i only get 12.8 mpg and when its cold it idles smoothly but after a few minutes it will develop a missfire, randomly on every cylinder and start shaking, no code but scanner shows that every cylinder missfires at some point, has new plugs and wires 2000 miles ago.

Yes its the awd quadrasteer truck however something with it is not right, jacked it up and both front and rear wheels turn but i got stuck the other day in snow and my buddy jumped out and noticed neither of the front wheels are turning, and if i get into even a dusting of snow then it will sit there and the speedo will read like 50 even though the truck isnt physically moving, so something with that isnt right. Nope there are no codes ive owned the truck for 8 months and at first it wouldnt even downshift when i put it to the wood, pulled the ecm fuse and did a relearn on the trans while driving aggresively and now it downshifts instantly and quick but still doesnt have the power to go anywhere. What kind of tester would i need for the 02 bung? or can i pull the upstream sensors and drive it to see if it makes a difference? thanks for the help!

Just replaced the fuel pump and regulator due to it stalling sometimes after starting and now fuel pressure is 60 koeo and 50 give or take 1 or 2 with engine running revving it stay at 50 ish, i lopped the stock muffler off and put on a dynomax cat back which helped a little, is there a way i can check if my cats are clogged besides looking to see if they are cherry red at night? But yeah the awd doesnt work due to a bad encoder motor (i believe) and it wont do a burnout it just revs to like 3 grand and nothing. Buggin me because even dragging my jet ski around (1500 lbs on trailer) it screams like 4500 rpms up hill at highway speed and accelerating from a stop will go to 5 grand before it shifts.

Ok i didnt know it would be different from wot to cruising, i will do a data log with my scanner tmr of some wot pulls and see what happens, the thing is a dog i calculated the 0-60 to be roughly 11 seconds and it has a 4.10 rear end. I saw someone said they took the tune from an 06 escalade and popped it on one of these trucks and it turned into a totally different animal, is this even do-able? wouldnt the different compression ratio from the lq4 to the lq9 cause issues in the tune? bare with me ive never tuned anything and dont own HP Tuners lmao im just trying to figure out why this thing is so slow and why with a 3000 lb trailer it wont go past 50 ish mph at 4000 rpm, wanna figure this because im considering dumping it for a duramax.

Hey guys! I have a 2002 gmc sierra 1500 Denali with the 6.0, cruising down the highway with the cruise set on 70 rpms at 1800 (4.10 rear end) i noticed on my scanner that my timing advance is staying at 50 degrees +- 1 or 2, is it just me that thinks thats too high for a stock truck? Saw on some forums people say dont go higher than 30 ish at wot? The truck is horribly slow and i read a bad MAF could cause high timing and poor performance? Thanks in advance!

I've got a 2002 gmc sierra 1500 denali, i can't find a single company that makes a lift for the truck. I'd like to go any size between 3 and 6 inch but all the companies ive talked to say there lifts wont work because of the rear steer not being able to function properly. I really dont care about the rear steer i've never used it and never will use it so are there any lift kits anyone knows of that will work if i dont use rear steer? Thanks in advance!

So i dont have like Hp Tuners all ive got is my obd scanner. At idle with the vacuum line connected Afr is 14.08 (which ended up being the same as the line off), Fuel flow was 0.37 gallons an hour (I will hook up my pressure gauge to the line when i get home) And coolant temp was 180. At 1500 rpm with line connected afr stayed at 14.08 fuel flow jumped to 1.29 gallons an hour. And at 2000 Rpm with line conected afr was still 14.08, fuel flow 1.65 gal/hr. For all of these data runs the coolant temp stayed at 180 and IAT's stayed at 37.4

yeah it idles between 14.05 and 14.1 under load it stays around 14.5. i feel like its begging for more fuel, the ignition timing also goes up to about 55-60 degrees at 4k

Well with the vacuum line on my afr's are roughly 14.xx with that off they did go to 14.08 which seems lean to me but not much different from before. I really dont understand the truck its a 6.0 mated to a 4l65e with a 4.10 rear end so it should pull like a train but our escalade that is the same setup only with 3.73 rear end and supposed 10 more hp blows the doors off it like im not even moving lol

I have a 2002 gmc sierra 1500 denali with the lq4, was running 45 psi fuel pressure idling i then changed the regulator and pump and now idles at 50 psi and is sluggish, if i remove the vacuum line on the regulator the pressure rises to 60 like oem spec says and it runs much better like this. My question is can i run the truck without the vacuum line connected? Will it go lean? Can i cap the line off? Definitely idles and pulls better with the line off.