Question about GMC Jimmy

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I have a 1998 Jimmy that on initial startup each day will lose all electrical power when put in drive gear. It will start right back up after a few seconds and run just fine from that point on, no matter how many times I turn the ignition off and on during that day. I've been told from others that it may be a bad battery (the one I have is just one year old)or a bad ignition switch. What's your thoughts?

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  • TomJTripp Aug 01, 2008

    It wouldn't be the master computer?

  • TomJTripp Aug 01, 2008

    It doesn't happen as soon as I put it into drive gear. I usually travel 20 yards or so before it cuts off.

  • TomJTripp Aug 01, 2008

    Thanks for your Help!

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The battery can be load tested,and checked if good or bad.There is a tool i have,it is a load tester,you attach it to the battery,flip the switch on for 15 seconds,and the load tester shows with a needle if the battery is good or not.The battery should be fully charged,and having sat idle for at least an hour or two before the test.If the battery passes the load test,i would look elsewhere for the problem,possibly the ignition switch,but check the connections at the battery for clean and tight,locate grounds,same thing,clean and tight,check all the electrical system basics,check relays,if any look like they've been hot or even melted, look in the fusebox, basic visual and hands on check.It almost sounds like a loose connection.

Posted on Aug 01, 2008

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  • GMC Master
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If it happens when you put gear it is probably the computer.

Posted on Aug 01, 2008

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Yes this can be a bad battery already because it seems that your battery is being drain that can also be cause by faulty wiring you can first check the wiring if everything is fine check also the starter and if its also fine replace the battery.

Hope that helps.........

Posted on Aug 01, 2008

  • Mark Gil
    Mark Gil Aug 01, 2008

    I doubt that because from what you're experiencing..Those can be the cause for that problem..

  • Mark Gil
    Mark Gil Aug 01, 2008

    If that's the case its really not the computer..

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1 Answer

I have a 98 Jimmy that when I try to start it the starter does not engage, I put a new battery in and it seemed to work for a couple of days and now it's back to the same problem. Any suggestions?


sounds like the starter is going, what happens is the battery had more power to help get the starter to operate a few more times but it is already shot. The part that will go on starters is the Bendix. It's the part that pushes the drive gear out to the front of the shaft to engage it with the flywheel. It's like a spring and plunger assembly with a magnetic part that pushes a fork on the gear while the key is turned and then springs back away from the flywheel once you let up on the key. You extra power from your new battery got it to push the gear out but was bound to fail since those parts were worn out. That's why you will hear the starter wizzing up but not engaging on the flywheel or you'll hear that grinding sound. that is due to the starter already turning the drive gear before the bendix has moved the gear forward. The gear is spinning and the bendix is stuck but then comes loose and tries to kick the spinning gear out and just grinds the flywheel without ever having the chance for the teeth to align first.

bottom line is you will need a new starter.

Jan 02, 2014 | 1998 GMC Jimmy

1 Answer

Why would my jimmy cut off sometimes while driveing and than run fine after sitting for a few minutes


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Lets take this piece by piece.
The 4x4 switch is defective.
A driveline vibration regardless of engine speed is usually a shaft or cv joint. To verify a visual inspection is necessary.
The poor acceleration in any gear is the begining of torque converter problems( stator or pump).As long as ATF level is correct.
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1 Answer

My 2000 gmc jimmy seems to have problems shifting initially in the first gear, and lately it has been redlining to 5000 rpm before shifting from 4th gear ( i think). I feel like one day it is just going to...


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This is one of the things i can think of that would cause the issue you gave me. Start with that since it's simple and the other thing to is you can try resetting the ECM.

Turn the ignition key to the run position (engine not running) and pull the ECM fuse out for 30 seconds. Place fuse back in and start the engine, the engine may stall but let it. The ECM is relearning the engine and transmission and then go for a test drive after idling for 1min. The transmission my be running back good as new, if not. Have the TPS checked if not replaced. Good luck and keep me posted.

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3 Answers

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You should be able to put in 4x4 while in drive less than 35mph. Mine had a switch to turn to engage or dis-engage.

Oct 15, 2009 | 1998 GMC Jimmy

1 Answer

Wont start


CHECK THE FUEL PRESSURE, THE ELECTRIC FUEL PUMP MAY HAVE FAILED.

Dec 14, 2008 | 1998 GMC Jimmy

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