Question about 2002 GMC Yukon XL

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Please help me with my GMC Truck I did put the Gas treatment today it still did not work

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I would recommend to check fuel pressure. Fuel injected cars are very fuel pressure sensitive. Fuel pressure is very important and must be within specifications! But if the pressure is low, it does not mean the pump is bad. A plugged fuel filter, a pinched line, and low voltage at the pump can contribute to low fuel pressure. All three must be check before replacing the pump.

Posted on Sep 09, 2009


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