Hard to keep vehicle in it's lane, tends to wander all over road, first to one side then to other side after steering correction is made.

It dies out while on freeway and sometimes at stop signs

Put it in 4h to drive through some mud now I can't get it back into 2h. Have pushed the buttons both the 2h and auto, moving, in neutral, in drive everything... stuck in 4H and drives hard on the road.

as a cam sensor. replaced crank sensor, was told it could cause that also. Now it wont start at all. cam sensor discontinued and im packed up to go on vacation. isnt there some thing i can do to fix this thing. I'm desperate to say the least

I was coming back from Stanley north Dakota and we stopped for the bathroom and went to start truck and heard a squell and didn't think anything bout it started driving and had no steering the battery little came on and the engine was real hot finally just stopped looked and belt was shreeded checked pullys and all but 1 turned by hand I think the tensiure pully might be bad

Using zerostart heater

checked the in and out to the heater, hot going in cold coming out

The hose going in to the heater is hot but the hose coming out is cold I have blown air on to the temp sensor

I poened it (slide back style) and now it will not fully close again -- reaches about half an inch from closed and stops, won't pop back up to flush with the roof. I don't see anything blocking, and have heard this isn't uncommon for GM trucks in this era.

Can someone offer diagnosis / correction advice please?

window does not go down - only up.

I have taken the time to check the grounding the fluid and the connections. It still will not shift into 4 wheel drive. If I stop and put it in nutural I can get the 4 low to engage but the 2 wheel light up as well. very loude shift but I am not confident that it is really engaged.
also can not get the transfer case to register nutural on the selector.

When the truck is warmed up and the weather is HOT outside, it seems to load up with fuel. it pops and "backfires" when accelrating until it "cleans itself up" then will run fine until idling again then it starts all over again. NOW when the weather is a little cooler outside it doesnt seem to do it as much. I was told I should take a look at the Fuel pressure regulator. Does this sound like it may be the problem?? and if so, is there any way to check it??

all fuses have been checked and replaced including relays there is gas coming through could this mean its not gettin spark and if so how do i check

2004 2500 avalanche what transferecase came w/8.1 and what is the low range ratio.

I have a leak at the transmission. I need to replace a front transmission seal. Can you tell me what is the estimated cost to replace the front transmission seal.

my dashpanels ligths went dea HELP

My "4WD NEEDS SERVICING" warning message has been on for about 2 months. I checked/added 4WD fluid to both transfer cases. This morning, my "4WD LO" light was illuminated and I had no success shifting out of 4LO following manual instructions. 4LO light is still illuminated. Any suggestions?

I have an electrical problem. The ABS and brake warning light stays on and my ignition key will not turn the engine off. The key is locked in the ignition and will not release.

My engine misses when it idle and when I drive it.So I tried changing the spark plus ,spark plug wires and the number 7 ignition coil still give me reading on number 7 cylinder when i check it with the diagnostic tool so I swap the coil 1 around with 7 and still get a reading it number 7

Hi I have avalanche 2002 2500 8.1 ... the auto transmission when change from gear to gear( from 3 gear to 4 gear ) i hear strong hit ( click ) ... what is the problem ?? Thanks

The dashlights goes out at different times and you have to tap on the dash to get them to come back on. also the heat and air sometimes has to be put on 3 before you can feel anything.

my 2003 avalanche keeps going dead every few days i have put in a new battery and i am still having the same problems any ideas on how to fix this

Dealer tells me it will take 2 visits due to code ID and has estimated $350 to repair, looking for better estimate.

Hi there:

How should i know if the previous owner performed a modification on the computer´s program in order to gain gas mileage or to achive some more power ? He instaled big tires on it,

I´ll aprecite your advise, thank´s

i asked a question earlier about this being a possible problem with the fan speed switch. in the defroster or vent mode very little air flow on high. when turned to bi-level and recirrculating you hear and can feel more air flow. since this problem started the was times it would kick up and run a few minutes and go back down. after doing research and trouble shooting could this be an air flow problem with the door actuator. if so how easy is it to rememdy the problem??

while in the heater/defroster setting my fan does not go to high speed. at times in may kick in for a few moments then goes back down, what is possible problem? the fan switch or what?

The AC blows hot air on the driver side and cool on the passenger and when the heat is on it blows cold air on the driver side and hot air on the passenger side. It dose this off on on.