Question about 1999 GMC Jimmy

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My 1999 GMC Jimmy is in the garage. They did a tune up for me because it was running rough. But even after the tune up, it is still running rough. They thought maybe the Spider needed to be replaced. They have had it for a week and have had 3 experienced qualified mechanics look at it. They now say maybe it is not the Spider because it is still holding pressure. If they can't figure it out tomorrow after another mechanic comes in to consult they will tell me to take it to the dealer. That is out of the question. Is this a common problem with the 1999 Jimmy? Is the car worth paying to get fixed? Why can they not figure this out? What can you suggest?

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Do you know if they have checked the catalytic conerter? It maybe that it is starting to plug up. they should be able to do a back-pressure test to rule this out or confirm. good luck!

Posted on Oct 28, 2010

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Posted on Jan 02, 2017

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