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#1
09-19-2006, 05:28 PM
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99 Yukon loss of power
Have a 99 GMC Yukon with 120K on it. It runs rough at first when starting when the weather is cold. No problem in the summer. Hesitates and chugs for the first few minutes.
Recently I've noticed a segnificant loss of power on steep inclines. Like 70% going up a 1/4 mile hill. Normal driving (flat, even slight incline) it's fine. Last edited by whud; 09-19-2006 at 05:31 PM. Reason: clearity 
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#2
09-19-2006, 06:05 PM
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Re: 99 Yukon loss of power
Quote:
How is the tune up end? What is the mileage and what kind of plugs? Any engine miss fires? Plugs and fuel filter and fuel pressure? Any check engine lights or codes.
__________________
Remember proper testing gives us the answer to many problems. MT
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