Question about 1999 GMC Yukon

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1999 Yukon, even if I start the car and let it warm up before putting it in drive, I have to drive around the block at least once or twice due to the vehicle not accelerating past 10mph and the rpm staying below or at 1. Engaging the accelerator does not do anything, it will **** ect.. like its trying to catch up with the timing. I need this vehicle to last a little longer no funds to buy a good used vehicle nor the funds to totaly replace an engine.

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This sounds like you have a bum MAF sensor (mass air flow sensor). This is the sensor between the air box and the throttle body. These are really good trucks. Unplug the sensor which is a 4 pin plug. If it accelerates from there, replace the maf. If it still does not accelerate, remove the fuel filter which is on the driver's side of the frame and blow through it. If you can not blow through it like a straw, it is plugged and is starving the engine for fuel. Let me know what you find, be happy to help.

Posted on May 22, 2011

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