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High idel control on a 2001 gmc yukon xl with a 350 engine, not the first time it has happened, dealers fix only temporary

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These trucks have throttle body problems, the throtlebodys have to be replaced on these, first make sure the throtle body is clean and that there are no vacuum leaks, also see if the idle air control is sold sperate. on many newer models the complete throtle body has to be replaced,call your dealer and see if that truck has a recall on this problem.

Posted on Jul 13, 2010


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The air works in my 2001 GMC Yukon but it only blows through the defrost and the floor. What could be the problem and how can I fix this?

I think the flapper doors which direct the air flow are all controlled by engine vacuum which is piped through a one way valve (check valve), then into a vacuum resivoir, then to dash. Any leak in vacuum will cause this issue.

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My 2001 Yukon XL will tap when idling and the check engine oil pressure light comes on until I give it some gas then it goes away and tapping stops. What is this problem?

Without hearing it, I can only guess. Collapsed lifter or loose connecting rod bearing.

High miles? Maintenance not done on schedule? That would do it.

Oct 18, 2014 | 2001 GMC Yukon XL

1 Answer

My 2001 GMC Yukon XL Denali stalls while turning slow like into a parking spot. No warning lights or anything. It has done it while making a u-turn also. Alternator is good, battery is good, and pump is...

Hey guy I had the same problem with my 2001 Yukon XL. I took it to the dealer and they charged me an arm and a leg for a diag which found nothing. I had the fuel filter changed which fixed the problem for a few months but the problem came back. I have a new car now and drive that most of the time. I came across a site and this guy said to clean the Throttle Body like this link says, and also clean the mass air flow sensor as this link says, I also changed out the air filter. Fixed my problem, the engine no longer stalls and that idle flux has stopped also. I hope this helps you and anyone else who is having this problem.


Apr 09, 2010 | 2001 GMC Yukon XL

1 Answer

2001 GMC Yukon XL 5.3L - Engine Timing

Doubt it. try a code reader. Sound like an emissions problem

Apr 06, 2010 | 2001 GMC Yukon XL

1 Answer

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read the manule or call the dealer dont take some strangers advice for somthing this easy

Mar 18, 2010 | 2001 GMC Yukon XL

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Nov 12, 2009 | 2001 GMC Yukon XL

1 Answer

I have a 2001 yukon XL. The coolant is

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Oct 17, 2009 | 2001 GMC Yukon XL

1 Answer

My GMC yukon XL 2001 engine runs after 4 times of cranking.

Try turning key to on only, not start, 2 or 3 times first then try to start. If it starts good first try, then I'd change my fuel filter & then have fuel pressure tested if fuel filter didn't help. You may be looking at a new pump, but lets do filter & test fuel pressure first.

Jul 06, 2009 | 2001 GMC Yukon XL

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