Question about 2000 GMC Jimmy
The garage wants to replace the air pump and i think it has somthing to do with the tune up I just did. Maybe the bosch spark plugs could be the problem. Not only does it buck after a few bucks at 65 it will downshift into a passing gear and wont shift back up until i slow to 50 or 55 for a few minutes. What should i do ?
If you can find a place will be scan your system for you that would be good. Where ever you take it, have them look at the O2 sensors switching. You may have an O2 sensor being really lazy or not working at all. I don't think your air pump has anything to do with your problem. You may be experiencing a torque convertor lock up problem as well. Definitely get a data stream done before changing any parts that you don't need replaced.
Posted on Nov 01, 2008
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Posted on Jan 02, 2017
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