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Chevy Blazer GMC Jimmy Maintenance and Repair

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  • I have a '99 GMC Jimmy 4x4. My 4WD was not working. The light would flash but not engage. I took it to a transmission shop who changed the motor in the transfer case. The problem is the 4WD lights on the dash do not light and the Service 4WD light now appears. The transmission shop said there is power to to the motor, but they can't figure out how to get the 4WD lights to work - or to engage. They suggested going to a dealer who might have a "tech 2 diagnostic scanner" which could figure out the problem, but I am reluctant to go to a dealer and get raked over the $$$$ coals. Has anyone seen this - if so, suggestions on how to fix it?? Thanks!!
  • ckk4ckk4 Posts: 13
    Also, does anyone know where the bank 1, sensor 3 is located on a 1997 blazer?
  • Ever see something called the 4X4 Posi-Lok? It's a mechanical (cable) linkage that does away with a lot of the engagement problems associated with the vacuum and electric systems. I was thinking of putting one in my 96. Anyone have any experience with this? It looks good and simple to install.
  • I HAVE 1995 BLAZER 4WD STARTED GETTING COLD OUT & DIDNT WANT TO START UP RIGHT AWAY. CHECKED ALT. & BATTERY {NEW} THEY WERE BOTH OK. I HAD THE STARTER REPLACED AND THOUGHT IT WAS A DONE DEAL, NO., SAME PROBLEM THAT NIGHT AFTER IT HAD SAT FOR 4HRS. IT EVENTUALLY STARTED & WENT STRAIGHT TO AUTO ZONE TO RETURN OLD STARTER & HAVE IT CHECKED. THINKING IT WAS GOING TO BE GOOD & BECAUSE CHANGING IT DIDNT FIX MY PROBLEM, IT WAS BAD. TOOK IT TO HAVE IT LOOKED AT WHERE I HAD MY OIL CHANGED AND THEY HAD MY TRUCK FOR A WEEK AND HAVE KNOW IDEA WHAT COULD BE WRONG. THEY CHECKED EVERYTHING INJECTORS, FUEL PUMP, DISTRIBUTER, THEY HAD TO LEAVE IT OUTSIDE OVERNIGHT SO THEY COULD SEE IN THE A.M. WHAT IT WAS DOING FROM BEING OUT IN THE COLD. {ONCE I GET IT RUNNING FOR THE DAY IT STARTS PERFECTLY.} THEY THOUGHT ALL IT NEEDED WAS A TUNE UP,HA! DON'T I WISH, IT'S STILL NOT FIXED & THEY DON'T HAVE A CLUE & ARE STILL HELPING ME SEARCH FOR THE SOLUTION. ANY INFO WILL HELP & GOOD LUCK! FORGOT TO MENTION, WHEN I TURN THE KEY OVER I WAIT TO LISTEN FOR THE INJECTORS & 5 OUT OF 10 TIMES NOTHING HAPPENS. AFTER REPEATED ATTEMPS TO START IT WHEN ITS COLD THE BATTERY GOES DEAD BUT AFTER LETTING IT SIT FOR A WHILE THE BATTERY WILL BE FINE. LIKE IT RECHARGES ITSELF??? ALSO, A VERY STRONG GAS SMELL WHEN I DO GET IT TO START
  • tidestertidester Posts: 10,110
    I suggest turning off your CAPS LOCK. People tend to ignore posts written in ALL CAPS. Kinda hard on the eyes ...!

    tidester, host
  • tburttburt Posts: 1
    I have a 98 blazer that cranks well, gets a spark has a charged battery and a fairly new starter with tight connections and no corrosion. I live in MI so its cold and the gas was around 1/4 tank, I tried adding more gas and some drygas and it still won't start. I noticed it was getting sluggish before it stopped starting. I can hear the fuel pump buzzing fine, I am going to replace the fuel filter but don't have any ideas after that without pulling up codes. Any ideas would be appreciated.
  • i cant figure this darn forum out. *new user* I recently replaced oxygen sensors in my 1998 blazer everyone has told me there are 4 of them but i can only locate 3 of them. i need help locating 4th. *2 on Y pipe 1 after each exhaust manifold* and 1 directly after cat. 4th MIA Please help
  • steverstever Viva Las CrucesPosts: 40,862
    Are you sure there are four?

    monkeyhead, "Chevy Blazer/GMC Jimmy: Problems & Solutions" #649, 14 Feb 2003 10:33 pm

    Try a Search This Discussion for sensor; maybe some of those posts will help while waiting for responses.

    Steve, Host

    Moderator
    Need help navigating? stever@edmunds.com - or send a private message by clicking on my name.

  • No im not sure iv looked everywhere but 2 napa's , 2 auto zones and a o'reilys told me there where 4 of them so i dunno, gonna check with chevy dealer after holidays if anyone hasent solved problem on here
  • reason for changing O2 sensors, after reading your post im worried :( refering back to post #649 by monkeyhead, having similar problems, but not exact on my 98 blazer i do not have rough idle idles fine. but when i get on it *mainly in cold weather* it has slow acceleration at pretty much any speed reves high but very slow speed gain at around 4500 rpm's will start sputering the other nite i could barly run 50 down the interstate *15 degrees outside*. service engine light would come on and off roughly every other day?? diagnostics told me at local dealer all O2 sesors are lean and need replaced, posible bad fuel pump.... replaced 3 out of who knows how many O2's now lol last nite ran great after replacing but this morning only did it on initual take off fine rest of day , any ideas?
  • bertbbertb Posts: 1
    I have a 1996 Blazer, runs great, recently have experienced the engine shuts off for no apparent reason. I have had it analyzed no valid codes, I have replaced the fuel filter, checked the fuel quality from the tank, verified the fuel pump and pressure. It starts, and will run for a short period and then shuts off, thought it might be the oil pressure switch so I used the fuel pump test terminal to power the fuel pump and still shuts off.
    Anyone have any other suggestions?? Already spent enough $$$.
  • I just bought my 2000 gmc jimmy, and before the first payment was due, i paid out over 500.00 in repairs,, now it is stuck in 4wd. lights flash at 2wd button , but stays in 4wd,, any help..
  • alcanalcan Posts: 2,550
    Find a dealer who can diagnose the lean fuel mixture problem rather than replacing O2 sensors for doing what they're designed to do. How's the fuel pressure? Fuel filter replaced? Any vacuum leaks?
  • fuel pressure 57 psi. normal. new fuel filter. no vacume leaks that i know of.
  • Mine just started doing the same thing. I'm going to do my own research. I will let you know what I find out. I'd appreciate if you would do the same. Good Luck! Chat with you soon. John
  • bank 1 driver side on exaust pipe.bank 2 passenger side on exaust #3 sensor is down line of these two sensor
  • It almost sounds same as my problem. I ended up replacing MAP and MAF sensors.

    For now, the way to get your truck start up, is to do this:
    1) Turn key on and start and hold it there for like 5 seconds
    2) Turn key off
    3) Turn key to On for 1/2 second then start for 1 second
    4) Repeat #3 about 3 or 4 more times and it should fire it up.

    In other words, 1 long start followed by a few quick short starts.

    Give it a try and let me know if it worked.
  • Matt,

    Honestly, I wouldn't buy a Blazer at all. Stay away. We got enough problems already. I read that '92 thru 2000 Blazers are not worth it. I've ready a lot of horror stories.

    I do even own the Blazer and wish I never bought it.

    I'm gonna trade it off this coming year for a foreign SUV, either a Pathfinder or a Forerunner cuz I read that they don't as many problems.

    My advice is, before buying a SUV, please read the forums for a particular vehicle that you're interested in and see if there's a lot of complaints or not.

    I wish I done that first before buying my Blazer.

    Oh yeah, and be sure to not to buy a Ford Bronco II at all. Also junk too cuz I owned it and they built bad tranny, 82 thru 92.

    --Ralph
  • Had a similar problem today. Tried a few things like swapping out some relays which seemed to work in the past. No luck. Tried the "1 long followed by a few quick short starts" After a few tries it worked. What is the root of this problem, and why does this starting remedy seem to work? Thanks.
  • I have a 94 jimmy 4.3 liter. im trying to get the motor out but the oil pan hits the front diff. and the tranny is pulled back to the firewall. in need more clearnce. just wondering if i have to drop the transfer case and tranny frist then pull the motor or what? thanks for the help.
  • After I start up the engine a high pitched whine begins coming from the rear-end of the vehicle. ANy ideas?
  • alcanalcan Posts: 2,550
    Fuel pump.
  • Did you ever get the problem fixed? I am working on a 1995 GMC Jimmy with 118,000 mile and the same problem?
  • i have been trying to get the starter out it is unhooked ,but i cannot get it out is there a trick?
  • Debby,
    It is a vacuum-control system. I would check the vacuum connections first. Open the hood, and look at the upper-middle area of the firewall (above the distributor cap). there is a part there with two small nipples connecting vacuum hoses. I had one of the nipples break off. I super-glued it back on and the system worked fine. It could be that or those hoses.
  • alcanalcan Posts: 2,550
    Engine? 2WD, 4x4?
  • thanks anyway i had to take off all the hoses that were in the way
  • bill81bill81 Posts: 2
    I have the same problem with a '97 blazer and I am stumped...I do not see the solution to this problem?
  • bill81bill81 Posts: 2
    Lowrider, did you find a solution?
  • Those of you who have 99 and up GMC Jimmys or Blazers know that the rear defrost is in part powered by two wires that hang from the top of the rear gate to the rear window. Recently, one of the wires came loose from the rear window. So in effect, I just have one of the wires hanging from the top of the rear gate. It looks like some sort of glue kept it up to the window. When I press the part that seperated from the window there seems to be an electrical spark. Does anyone know if it is OK to simply superglue or apply some sort of adhesive to this end to make it stick back on the window? will it affect the defrost capabilities? or should I take it in to have something like this fixed professionally?
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