Question about 2001 GMC Jimmy

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1998 GMC Jimmy-Turning Signal Noise

I have a 1998 GMC Jimmy SLT and the flasher wont stop making the clicking noise. all the bulbs in the truck work but when im not on the brakes and just driving, you hear the noise the turning signals make but they are not on. What could this be?

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  • dandann Mar 16, 2009

    I am having the same problem, thought it was the connections but NOT! 1998 GMC Jimmy-Turning Signal Noise

  • Randy Donaghe Mar 29, 2009

    changed all flashers and still clicks
    coming from pass side under dash

  • darnbog Apr 09, 2009

    2001 jimmy same problem. comes and goes. when u put on the break the noise stops.

  • yadayada
    yadayada May 11, 2010

    the flasher is defective.

  • Jerry Koski
    Jerry Koski May 11, 2010

    sounds like a stuck flasher or something .. try working flashers up and down a few times to see.. just a thought Jerry holler if you have more.

  • Anonymous Mar 25, 2014

    When leaving from stop light removing foot off the brake pedal through truck makes a loud clunky noise that I think comes more from the rear of the truck. This will happen in 4x2 or 4x4 and with light braking or heavy braking with a load or empty in the bed. I have replaced the rear drive shaft and the u joints. The front u joints have also been replaced. All parts GMC OEM.


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Had same problem on fathers 98' Jimmy SLT. There is a $300 computer under the dash that controls that among other things (fuel gauge actually started to work after replacement too) which after replacement everything worked fine. Sorry i can't remember the actual part number; just google the problem and you can probably find the problem.

Posted on Apr 21, 2009

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Check all bulbs first

Posted on Apr 15, 2009

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I have a 1998 GMC Jimmy SLT with same exact problem. I just determined exactly what it is today.
Here is what you should do:

1) Open glove box

2) Notice the u-shape mechanism that prevents the glove box from folding all the way down. (located near top left corner of OPEN glove box

3) Empty contents of glove box and then push up on U-shape and open glove box so that it hangs freely

4) Notice the wiring harness with a bolt in middle of it (located behind glove box)

5) To the right of the wiring harness is a small black box with a zip tie over it. This is the source of your problem. Just slide the zip tie to the right so that the box can then be pulled out.

This is your combination flasher for turn and hazard signals. My signals still worked while this annoying little thing kept clicking. The model # is GM11516051. You can find one on e-bay for at least 1/2 the price of the dealer's.

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There are 2 common things that cause this.
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2. The turn signal switch in the steering column is bad. Turning the turn signal from left to right- very fast and harshly, will sometimes clear it up for awhile.
Tech JK

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