Question about 1997 GMC Jimmy

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ABS light comes on 97 Jimmy

When The Abs light comes on The speedometer dosen't work and I lose power. It's like I'm stuck in neutral. Then it suddenly kicks in And the Jimmy starts taking off. This happens after I've been driving for half an hour. I took it in for repairs,and the mechanic did the computer test and said everything was ok, but the light still came on and went in neutral. It's been in the shop for almost 3 weeks. Said I might have to buy chip that cost $1800. Does this sound right? I know nothing about cars. Also is the Airbag light suppose to be on?





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  • Anonymous Dec 03, 2008

    In regard to the speed sensor, the mechanic checked it twice and light still comes on. So,he's going to try to reboot the computer, and check the relay wires. I appreciate all your help and I'll let you know how this turns out. Aloha

  • Jolene Apostol Dec 03, 2008

    I appreciate your help. Mechanic checked speed sensor twice, was ok, light still comes on. Going to reboot computer and check relay wires. Aloha

  • Ryguy1969 Dec 26, 2008

    The exact same thin happened to me at 11:30PM on Christmas eve, but I found that the speedo did not work, then the ABS light came on, and the Jimmy would not come out of First gear, although it did go into reverse as well. My Jimmy is a 1998 SLS 4X4, 4Dr. Thru some web research, it appears to be the vehicle speed sensor, which on my vehicle is located on the transfer case. I plan on replacing it this week. (Around 105.00 from Napa) I will let you know if it works!

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The Airbag and ABS are separate systems and un-related, the speedo is related to the ABS light, I think if you run a self test on the system computer there will be a trouble code for the transmission speed sensor, the output of this sensor is used by the ABS and the speedometer. The airbag is most likely a defective rotating contact under the steering wheel, we techs call it a clock-spring contact because of it's shape, it allows the connection from the steering column to the airbag. CAUTION! If you want to change out this contact the steering wheel needs to be pulled, follow factory recommendations on dis-arming the airbag, it can be very dangerous if you don't.

Posted on Dec 02, 2008

  • yadayada
    yadayada Dec 03, 2008

    I never said the sensor was the issue, I said check the output, that means wiring, computer connectors the whole nine yards, codes etc.

  • yadayada
    yadayada Dec 03, 2008

    Also you never said the technician checked the sensor (WHAT DOES CHECKED MEAN, DID HE SEE IF THE SIGNAL REACHES THE DASH AND THE COMPUTER??), I gave you the things I would start checking if the truck was in my shop, an honestly I dont' know why the THANKS FOR TRYING.

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