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Chevy Blazer GMC Jimmy Maintenance and Repair



  • there are 2 things that I would be checking!

    1) check the oil pressure... it should be no less then 275kpa at idel 600 - 800 rpm.

    2) check the belt tentener. if its sitting on a angle or if you can move it with your hand then its bad. also try poping the hood when its running and rev the engine up and then let go while looking at the belt tentener see if there is any thing hitting (the inner to outer housing hitting each other).

    if you the first to things dont show anything up... then while the engine is running check and making the clicking noices use a long screw drive as a prob and touch different areas of the motor all over and listen through the screw driver to try to pin point the soure of the noise.
  • sorry to say you can not access the computer through the stereo. you need to get a OBD II hand held scanner cost about $150... its worth the money
  • hello, I am having the same problem with my 98 blazer.... when yours is clicking play with the turn signal leaver... put a little bit of pressure on it up or down from and back or flick your high beams on and then off... 90% chance its the switch under the stearing wheel.
  • hello, most likly a blowing ideler arm... have it checked out A.S.A.P if it snaps you lose your steering!
  • check the ball joints out really good... most likely you have a bad ball joint. Also just for the record... I had a simular problem with my truck jumping around and shacking... I replaces all my tires and it problem fixed... I checked for split belts and had them balanced 4 - 6 times a year as I sometimes kick the weights off when I am 4x4...

    as for the clicking blinker... mostlily the switch! mine dose the same way.. will be fixing that soon!
  • repairdogrepairdog Posts: 948
    I'm in FL too.
    As for your rebuild, don't forget to look at the oil cooler lines (crimps leak)and then the secondary air injection system (on exhaust manifolds are 2 check valves and hoses, then under the radiator is the electric air pump and vac switch) cause these pick up water and DTC P0410 code shows - if you get an exhaust noise feel the 2 hoses for burn thru - extend the air pickup hose on the pass side of radiator 2' and put it in the area between the battery and coolant reservior so it won't suck water in. Both my 99 and 01 have had problems. Also change that transfer case fluid and if Autotrac (4 button) use the GM only syn fluid thats blue (2qts)- will help the life of it.
  • hello, your ac needs to be services. I suggest taking it to a good shop. Your compressor is making noise due to low oil level and low gas.
  • Here is a very qick fix for all those who have problems with their 97 and up blazer / jimmy wipers.

    1) disconnect the wires from the wiper motor.
    2) remove the black cover off the motor ( 2 or 3 screws)
    3) remove the circit board from the wiper motor

    Now look at the circit board for any signs of a circit pealing off or burnt out.

    Look at the connection block where the wire harnass plugs into. Usall the soider joints go bad there as well as a 1cm or 1/4" of a very small circuit not far from the connector block on the bottom...

    now to fix the circit problem:
    1) use your finger nail to peal or scrap off the bad area of the circuit.
    2) get a small peice of spaker wire and jumper the bad area of the ciruit and soider it.
    3) re-soider the connection block even if it looks good and check all other soider joints.

    Re-install the board, replace the cover and plug the wire connection back in. Now try your wipers.

    I had done this to mine, now the wipers stop where they should, they work at all speeds and not problems for over 60,000kms I live in canada and get lots of rain and snow so the wipers are well used!

    save your self money and fix the board that you have or have a friend fix it for you and it will alast forever! well almost but longer then a stock replacment will!
  • mongo1mongo1 Posts: 49
    Once again, thank you for the excellent advice. Actually though, I'm a bit past "doing it myself" anymore. I still change oil, diagnose when necessary and make "emergency repairs" when needed. But I have a philosophy, I build bridges. You want a bridge built, come see me. I need an engine rebuilt, I come see you! I am very fortunate to have several excellent mechanics very close by here in Longwood. Seminole Car Care (Cheap Plug!) is the one taking care of my Jimmy. What part of FL are you in? I've lived just about everywhere except the panhandle. Thanks again Repairdog, I will print this out and give it to Bill over at S.C.C. :D
  • I have shattered the sunroof on my 96 Jimmy and I took it to the dealer and they wanted $400 bucks so I got on a mission to find a used sunroof from used part stores and junkyards... i found one from a 97 for $120 as I was told it was the same but apparently is smalller... is it possible or was I given the wrong glass?? does anyone know if they are different because as far as I understood, from 95 to like 98 Jimmmy's barely changed and I doubt they would only change the sunroof....i would appreciate some advice..or where I could find a used sunroof for a 96 jimmy. thankyou
  • gonzo10gonzo10 Posts: 1
    on a 92 chevy s10 blazer "w" engine, there's no power at the fuel pump relay wire coming from the ecm but if i jump the relay i can hear the pump working, can somebody help with this problem?
  • I have a 2000 blazer and the transmision went around 80000 miles. I have just had it fixed a couple weeks ago and I am starting to have the same problems with it. First gear will go until i let off the gas and it shifts rough into 2nd gear, if i dont it will redline the engine. What is the problem with it?
  • jseagerjseager Posts: 2
    1987 GMC Jimmy 4x4... pressure guage is pegged past max, dip stick it being pushed out during idle and when I remove the filler cap during idle there is a hissing sound like I just opened a carbonated soda. Any ideas on where I should start troubleshooting? If you suggest the oil pump how can I test it before replacing it?

  • My fuel gauge stoped working just before my trans. went. It will sway back and forth. when it is low on fuel it will stay at the full mark and drop down to the empty mark and then the fuel light will go on. I got an estimate from a shop ad they wanted $1000 to fix it. Does anyone know what the porblem is? I think a loose wire or something because it works sometimes and sometimes not. What do you think?
  • repairdogrepairdog Posts: 948
    Change the PCV valve and check the vent tube to the air cleaner. Oil pumps have gears and as the clearances increase pressue drops - not suddenly increase. Is the filter new and oil - do that too.
  • repairdogrepairdog Posts: 948
    The crash book only shows 1 sunroof but no years listed so I too assume its the same. Get the dealer to look it up and confirm. Also should have a # somewhere on it to match.
  • repairdogrepairdog Posts: 948
    4L60-E have known problems with 1-2 hard shifts and is from the TCC regulator and isolator valves. GM issued bulletins on this and #99-07-30-005 and code DTC P1870. Valve was updated in 99 so you should have the newer model but the trans shop better know all this or they aren't too sharp! All accessed with the pan dropped in the valve body so this is not hard to get to. Sometimes even alittle dirt or junk from a rebuild can cause so have them check/change the filter. GM says every 30k good conditions and 15k harsh.
  • repairdogrepairdog Posts: 948
    98up have an integrated pump and sender and the unit costs $350 at the dealer plus install of a few hours - Not over $600 at a shop normally - ask how many hours to drop the tank and replace plus the part. That sender is a float on an arm that goes up and down and the resistor contacts get worn and loose - bad design and GM has changed the older ones now.
  • jseagerjseager Posts: 2
    I did a major tune up 2 months ago and changed the pcv, egr, fuel filter, all fluids, air filter, and my valve cover gaskets and oil filter. It ran great for the past 2 months. I do not know about the air cleaner unless you are speaking of the air filter above the carb. I will look it up I guess.

  • rgejgrgejg Posts: 1
    My heated exterior power mirrors only operate in two directions instead of four (up,down,in,out). This applies to both exterior side mirrors.
    Does anyone have a solution or have experienced this problem.
  • repairdogrepairdog Posts: 948
    Common - push the switches a few times (5-10) hard in each direction to clean the contacts and they usually start to work again,
  • repairdogrepairdog Posts: 948
    Yes, air filter - sounds like pressure buildup due to the PCV and/or breather tube clogged - so see if the PCV still is fairy clean inside and rattles or shakes freely inside.
  • stoman82stoman82 Posts: 1
    I have cleaned/ replaced EGR valve. Replaced all 6 plugs in the vortex 6 cylinder engine (must admit one of them on the drivers side middle was quite the chore!@) Stills backfires, runs like !@$)#, :mad: and gets about 8 miles to the gallon when I can keep it running! I am at the end of my frustration level. last backfire blew out the rearend of my new muffler. anyone wants to email help Need this thing to work so I can work. :cry:
  • repairdogrepairdog Posts: 948
    Very common is a leaking CPI regulator and hoses (called a nut kit) under the upper intake manifold. Removal is required to fix/replace the parts and check the oil for a gas smell - if its there stop driving it now till fixed.

    Here's info I pulled for you on how to check:
    You can remove the IMTV (Intake Manifold Tuning Valve) from intake manifold. Once the IMTV unit is removed, visually inspect the inside of intake manifold. The manifold and injector unit should be very carboned up and dirty. Any clean areas indicate a fuel leak internal to the manifold plenum. Most times this is caused by the fuel pressure regulator leaking fuel from vent hole in the regulator body. Other factors may be present (such as a cracked inlet fuel line) but usually the regulator unit has failed. If no leak is detected through the IMTV hole, but a faulty unit is still suspected then you must pull the upper plenum to get a full view of the inside of the intake.

    If the assembly is bad then it must be replaced. A bad leak will dump so much fuel that it will get into the oil and cause engine damage. It is recommended that the CPI and Nut kit be replaced at the same time.
  • Hello,
    I have a 1998 Chevy Blazer. The Idle is fine, the acceleration is fine.
    But when you get it up to a steady speed it Misfires.
    I have changed spark plugs, and plug wires. Replaced the fuel filter.
    Ran injector cleaner time and time again.

    I don't know what else to do. Can you PLEASE help me?
  • I have a 97 blazer and mine is doing the same thing and i took mine to the dealer and they put a new computer in it.... it did nothin... did you get yours fixed? and if you did how?
  • repairdogrepairdog Posts: 948
    Assume high mileage so did you change the cap and rotor? If they get any moisture or crap in them that could be the cause so you need a torx driver (screw driver type) but sorry don't remember the size (think 15 or 20)to remove the 2 cap screws. They will be tight so be careful and you must have the correct torx size end or you could crack the cap or distributor base. Remove and inspect for tracks inside (arcing) or on the rotor see if its burned 180 out the wrong side (arcing again). If that dosen't fix it are there any codes (SES light on)?
  • Have a 2000 Chevy Blazer LS 4.3L with 70k miles. SES light came on. Bought the code reader and found that it was P1404 code. Replaced the EGR valve. Came home tonight and the SES light came back on now with code P0404. Anyone have any suggestions?
  • repairdogrepairdog Posts: 948
    After alittle searching found that once the EGR is replaced the computer needs to relearn the position of the valve and the dealer uses a scan tool, but here is a fix that should work as reported by several:
    "It appears that the secret to getting the EGR valve to relearn the closed position is to reset the trouble codes with the valve disconnected and immediately turn the key off so it doesn't have time to set the "EGR Circuit" code. Then connect the valve and turn the key back on and PRESTO!"
    That P0404 is related to EGR position and the relearn should fix that also. Post how it goes.
  • samantha2samantha2 Posts: 1
    My chevy blazer is not starting - sometimes it starts and other times it simply will not crank. I thought maybe it was the fuel pump, but i am not sure. All other functions are working, lights, radio, and interior lights. it turns and sounds like it wants to start but it just won't actuall turn all the way over. What could be the problem?
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