One problem related to clutch has been reported for the 1999 GMC Jimmy. The most recently reported issues are listed below.
The transmission slips from 2nd to 4th gear and yet the 3 automotive shops can not locate a problem! each one has replaced a part or 2 but they all say it is not the transmission nor the computer but none of them can fix it. I just keep getting passed down to another shop so they can get their $200. 00 to $300. 00 from me. The dealership I purchased it from will not even call me back to discuss the problem and I had paid an extra $1800. 00 for an additional warranty on the vehicle. I will never buy another GMC again!.