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Blazer Jimmy 4WD Questions

84 messages,  Last post on Feb 21, 2009 at 10:17 AM

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What is this discussion about? Chevrolet Blazer, GMC Jimmy, Auto Repair, SUV

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#35 of 84 Blazer Stuck in 4Lo by acarlson Apr 22, 2007 (12:47 pm)
Ok, I'm sure that people have posted this before, I've seen some of them. My 99' Blazer is stuck in 4Lo, I made sure it was nuetral, I checked all the vacuum hoses and I disconnected the battery in hopes that it would reset the computer but thus far it's still stuck in 4Lo. I am trying to see what else I can to try and fix it before I decide to take it to a mechanic. So if theres anyone who has any suggestions please let me know. Replies to this message: repairdog (Apr 24, 2007 2:09 am) thesweetrosslg (May 17, 2007 3:00 pm) repairdog (May 18, 2007 2:58 am)
#36 of 84 Re: Blazer Stuck in 4Lo [acarlson] by repairdog Apr 24, 2007 (2:09 am)
Replying to: acarlson (Apr 22, 2007 12:47 pm) Put the vac source line to the front axle (drivers side under hood) and see if it drops out when you push 2wd. As the many posts have talked about you have vac, transfer case encoder motor, that TCCM or computer in the pass isde kick panel (put the conncetor and make sure its clean and tight), and the front actuator. Replies to this message: thesweetrosslg (May 17, 2007 3:00 pm) repairdog (May 18, 2007 2:58 am)
#37 of 84 Re: Blazer Stuck in 4Lo [repairdog] by thesweetrosslg May 17, 2007 (3:00 pm)
Replying to: repairdog (Apr 24, 2007 2:09 am) i can push the button in my 97 Jimmy and i can hear a and feel it shift into 4 wheel drive and then when i hit 2 wd button i hear it and feel it shift back but its not working when i look are it if i get stuck the 4 wd dose not engage but the buttons light up and i can hear the noise what coudl this problem be and im not able to fix it myself how mouch could the most a shop would charge me cost do you think thank you Replies to this message: repairdog (May 18, 2007 2:58 am)
#38 of 84 Re: Blazer Stuck in 4Lo [thesweetrosslg] by repairdog May 18, 2007 (2:58 am)
Replying to: thesweetrosslg (May 17, 2007 3:00 pm) Search in the forum for many posts on this. Basics is you have to go thru the vac system and 3 port vac switch on the transfer case, the encoder motor on the case, the vac actuator under the battery, the front axle coupler, and the TCCM (4wd PC) to resolve. Vac lines and 3 port switch are where to start - see if all good and not rotted/split.
#40 of 84 stuck in 4 wheel drive 2001 blazer by gregg67 Aug 03, 2007 (12:15 pm)
i have a 2001 blazer that is stuck in wheel drive.it says its in 2 wheel.i'm pretty sure its HI you can hear it switch to LO and feel the difference.any ideas and how to chek servo's,switches etc; would be greatly appreciated.
#42 of 84 2000 ZR2 4WD problem by aaronj8 Oct 22, 2007 (7:20 am)
my blazer is stuck in 4WD Hi. Everything worked just fine until I put in a new heater core (what a job that was!) The heat works great now, however, upon starting it back up it is now stuck in 4WD Hi. When I try to switch to 2 Hi, I can hear it trying, but it isn't switching over. Any ideas on where to start? I know it is electrical in nature... i'm thinking that i just bumped a wire some place when i was in the dash, but don't know where. Any help would be GREATLY appreciated! Replies to this message: beyondtime024 (Dec 07, 2007 4:21 pm)
#43 of 84 4WD clunking by thumpingone Nov 22, 2007 (7:25 am)
I have a 98 Blazer I bought a few months ago... I have been getting very frusterated trying to figure out this problem.    The truck feels like I'm towing a trailer all the time, however the odd time it seems to lighten up. All the bumps on the road are very hard, very rough ride and when I go over bumps it bounces all over. Now when I put it in 4WD and hit the gas, I hear a cluck from the front left wheel. It almost sounds like a CV joint on a FWD car. But louder and harder.    I feel like these problems are all related to the same thing, but I can't find it. I've checked if any of the brakes are draging there all good. It possibly needs an alignment. If anyone can help, please do before I sell this thing!    Thanks Keith
#44 of 84 2000 Blazer can't put in to 4wd by posblazer Dec 06, 2007 (5:45 pm)
Push button to 4hi, it blinks for a few seconds and goes back to 2hi same when trying to put in Auto 4wd, any help would be appreciated. Replies to this message: mcassel4 (Dec 07, 2007 5:01 pm)

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