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Chevy Blazer GMC Jimmy Maintenance and Repair



  • capriracercapriracer Somewhere in the USPosts: 793
    I hope you ordered Load Range C tires (104 Load Index). Otherwise you didn't order tires with enough load carrying capacity - Load Range B has a Load Index of 96.

    Most Blazers come with P235/70R15's (102 Load Index) inflated to 35 psi. (If yours came with P235/75R15's, then you need a 31X10.50R15LT, but read on.)

    So assuming you ordered the Load Range C tires, you have to have 47 psi to get the same load carrying capacity. The net result is going to be that your vehicle is going to ride pretty badly.
  • I did get load range c tires. They are Dayton Timberline A/T's. Why are they going to ride badly?

    Thanks for the info!
  • Here is a link to the spec page for the tires, look for the 30X9.50R15. p?passproductid=168
  • How much should a standard tune up cost? I am a single mom and I feel very apprehensive going to auto shops for service cause I feel I'll get shafted or talked into something I don't need. This 93 Jimmy is my first "SUV". I've only owned 4 cyl "pocket rockets". The truck sputters on inclines and I know it needs a tune-up.
  • steverstever YooperlandPosts: 40,003
    The Edmunds Maintenance Guide will tell you what a regular service should cost for your zip code.

    With newer computer controlled cars, few people do "tune-ups" any more - you can change the plugs but most cars don't let you adjust the timing that was a part of old tune-ups. But your Jimmy may be old enough to still have a distributor cap, etc.

    Ask around your community - maybe you'll find a good independent mechanic nearby.

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  • capriracercapriracer Somewhere in the USPosts: 793
    I tried to call up the link you provided but it merely goes to spec list and I can't duplicate the process you used to determine that the size fitment was proper.

    However, the tires are going to ride badly because you need to have 47 psi in order to get the proper load carrying capacity.
  • capriracercapriracer Somewhere in the USPosts: 793

    I just noticed a typo.

    The pressure in the above post should be 37!! psi.

    Sorry for the confusion.
  • jmaxejmaxe Posts: 198
    I think I have something similar in my '00 Jimmy. About how much will this repair set me back at the dealer?
  • I am looking for a used 4x4 blazer 2002 or 2003. Is there anything special I need to look for that could indicate a mechanical problem with this year of blazer? What is typical of the gas mileage? If anyone would like to point out any known problems that are common, I would appreciate it.
  • Kirstie_HKirstie_H Posts: 10,824
    A reporter is wondering if anyone has had trouble getting parts for cars and trucks from the 1985-1997 model year. If you have a story to share, please send it to by Friday, November 19, 2004.

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  • My 2000 Blazer (Trailblazer trim) 40k miles is experiencing a weak cranking at start up. It has not failed to start the engine yet, but it hesitates before the engine ignites. Also the rear hutch unlocks as the engine starts. I thought the electric current used at the rear hutch was reducing the voltage available to ignite the engine. My dealer has a different opinion and says that "the problems are most likely from the weak battery as the weak battery does all the weird things". I am not sure if the weak battery falsely unlocks the rear hutch, and I still believe that the troubles are related to the faulty wiring or circuit board. Any opinions?
  • alcanalcan Posts: 2,550
    Use a set of jumper cables to connect to a known good battery and try starting it.
  • Alcan,

    Thank you for a quick response. I had to jump start the truck twice a few months ago, and the battery was ok until last week. The voltage is still normal at the middle of the meter (12V). The cranking and hesitation at the turn of the key began last week and the rear hutch unlocks as the engine starts.

    Is the dealer's opinion correct that the weak battery causes other electronic control malfunctionings?

    I still feel from other threads on this board that there might be a short in circuit boards or wiring.
  • Correction:

    The voltage is still normal at the middle of the meter (14V).

    instead of (12V).
  • You are stating 12V, then 14V, You must be referring to your CHARGING VOLTAGE while the engine is running. You need to put a voltmeter across the battery terminal and read what the voltage falls to while you are cranking the engine. It should not go below 9.5V. If it does, it is weak, or not charged enough, or your starter is drawing too heavy of a load. If you don't have a meter, turn on your dome light and watch it as you crank the engine, if it gets real dim, voltage is dropping too low. Charge up the battery, then take the battery to a good auto parts store and have it tested.
    Good Luck,
  • How do you flush the heater core? I am having the same problem.
  • I have a '96 Jimmy, the AC works fine but the heater will not warm up. What could be the problem. Any easy fix? I know that I have to flush out the rad cos it has jelled up. Could this be affecting the heater? What is the best way to flush out the rad and heater core without going to a shop? I will appreciate your advice.
  • Find both hoses that go to the heater core, they go to the fire wall next to the A/C (passenger side). Take the hoses loose and use a water hose with no metal end, to run water through the heater core. Push the hose on one side and then the other, so that you force water to flow both directions through the heater core. If water flows through, it's ok, If water does not flow though, it is clogged and it will need to be replaced.
    Good Luck,
  • Connect the water hose to one of the heater hoses that goes back into the engine, Remove the radiator cap, slowly turn water hose a little bit and water should come out the radiator filler. Start engine, let it idle, turn up the flow on water hose, do that until water runs out clear. If your system was real dirty or rusty, you may have to use a radiator cleaner chemical before you flush the cooling system with water. You can use some cleaner available at auto parts stores, or you can try pouring in a whole bottle of CLR and let the engine idle with the CLR in it. Be SURE to flush the system out with water after you use any chemical.
    Good Luck,
  • Thank you for your advice, I will try and clean the system this weekend. Thanks a lot
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