I just bought this 2000 Blazer LS. It is showing Service 4WD light and all lights are lite on 4WD switch. It also does not want to go in OD, real bad hesitation. Seems to do alright in 3, at least to 45mph just to get it home. Haven't checked anything on it yet. Figured I would get some ideas before wasting time looking randomly.
Thank you for reading and any resposes.
William

 

How many miles? Recommend servicing 4wd at least every 75,000(lube shop/dealership). As for OD shifting, service tranny fluid but more than likely you'll want to get it checked out by your local mechanic. Take it to someone you can trust cause the shops like to Jew us hard with these 2000's

 

113,000 miles. I can't afford to send to shop for fix, that's why i'm asking in here for help with this. Thanks anyway 2000LT4WD, but I need help diagnosing and fixing myself. Bought it for my son as a repair project for us to share.

 

Can you tell if the transfer case (TC) and front axle are in 4WD? With all the lites on the 4x4 buttons, something is wrong with the TC Control Module (TCCM)....and if in 4WD then trans will probably not go into 4th or OD....but not sure on that one....never tried it.

Would you be able to get the vehicle off the ground to determine if in 4WD?

 

Try spinning the front drive shaft by hand, it won't spin freely but it will spin if not engaged. You can try resetting the tccm by pulling the fuse (ATC I think) or disconnecting the battery for a while either way its a temporary fix. Let us know what you learn.

 

Thanks Lanny & Prom, I will look into these things this weekend and report my findings.

 

can anyone help me with my four wheel drive prob? i have a 04 chevy blazer that four wheel drive does not work at all in four hi it want even go in four hi. four low just grids unless u are going backwards and it works fine untill bout 3000 rpm and it like jumps out and back in i don't know what the probem is and i don't want to spend alot of money on the wrong thing any help will be thankful

 

https://blazerforum.com/forum/tech-a...4hi-4lo-41226/

https://blazerforum.com/forum/tech-a...ill-help-7180/

These two links sould give you guys a good head start.

2000LT4WD, very nice first post from a guy that can't fix his own truck. "Jew us hard" are you for real?

 

Ok, jacked it up and the front wheels spin. How do i go about troubleshooting the TCCM?

Thanks,

 

Thanks spittybays, I will look into those sites for more info. Oh and love the comment on 2000LT4WD.