Question about 1999 GMC Jimmy
You need to replace the coil resistor on the back of the firewall. it's a 3 inclog ceramic square device with a wire on one end and two on the other, it lowers the voltake when the key is in the run postion to keep from burning up the coil when it shorts out it does what you are talking about it costs $20.00
Posted on Jul 18, 2009
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Posted on Jan 02, 2017
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