Question about 2001 GMC Yukon XL

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2001 GMC yukon 5.3 lilter when turn on A/C eng rpm drop to 5

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Hello, your low idle issue is most likely one of two things. First, the fuel pressure regulator, which is mounted on the driver side of the engine, is a small round gold, or silver metal canister, with a vacuum line going to it, pull the vacuum hose off,and see if it is wet with gasoline. If it is, then this is your problem, and the regulator needs to be replaced.If not, the fuel injection system needs to be cleaned, as it has deposits built up, causing a low idle situation. The cleaning should be done at a repair facility, as a normal bottle of injector cleaner , that you would get at a parts store, will not fix this issue. Good luck...Coop

Posted on Oct 16, 2010

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Posted on Jan 02, 2017

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What should the cold start oil psi and the 190 degree warm up oil psi be on a 2000 to 2002 gmc Yukon with a 5.3 eng


Different engines can show different values. Sometimes it is the sensor itself that causes the variation. The pressures that you are witnessing are well within operation norms and are nothing to be worried about. As long as you don't experience severe drops in oil pressure during acceleration and deceleration, then the oil pressure system is working well.

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Voltage drop. When in parked I rev up the engine, when it comes down, the voltage drops from 14 to 10, for about 5 secs. I think the truck will cut off but it immediately comes back up to 14.


If the alternator is weak, and you have accessories like the headlights or blower motor running, and the RPM drops below 600, the voltage could be below 12. It would depend on the load, RPM, and several other factors.

Feb 12, 2014 | 2000 GMC Yukon XL

1 Answer

Fuel pressure specs for gmc sonoma 4.3


2001-2004 gmc sonoma 4.3 [X, W Eng.] fuel system specs: 60-66 psi when you turn the ignition key (fuel pump) on without starting the engine. If fuel pressure drops back down quickly after fuel pump stops working (works for only 5 sec.) then you have a bad fuel pump or leaking injector spider.

Aug 10, 2012 | GMC Sonoma Cars & Trucks

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My 2001 GMC Yukon 5.3l 4WD SUV is having (2) transmission problems. 1.) When cold, it shifts HARD from 1st into 2nd but after the 1st time while the engine is warm, it shifts smoothly. It started doing...


Does the trany fluid smell burnt? Might want to have the trany flushed - torque converter too - and replace the filter in the trans. FYI you may know this but it is not recomended that overdrive be enabled when pulling a trailer - especially a heavily loaded one. Does your town have lots of hills - this is an added stain on the trany.

Nov 18, 2010 | 2001 GMC Yukon XL

1 Answer

I have A 2001 gmc yukon 1500 the rpm go up and down


The idle spped control needs replacing and I would change the plugs & wires as well if very old

Jun 30, 2010 | 2001 GMC Yukon

1 Answer

How do you reset oilchange light on a 2001 yukon xl


turn key to on position, pump gas pedal to floor 5 times and turn off key. start vehilce. Change oil light should flash for 7 seconds and then go out.

May 15, 2010 | 2001 GMC Yukon XL

2 Answers

2006 Yukon Denali, oil pressure gauge malfunction


Most likely the oil pressure sensor is bad. Its located in the very rear of engine on top of bell housing area.

Oct 30, 2009 | 2006 GMC Yukon Denali

1 Answer

Problems at low RPM


check coolant level! look for coolant loss

Mar 21, 2009 | 2001 GMC Yukon XL

1 Answer

2001 gmc yukon xl 1500


Check to see if the power steering pump is still turning. If you have a broken drive belt (serpentine belt or "fan" belt), and the pump doesn't turn, you have no power assist. If the pump is still turning, check the fluid level in the reservoir.

Oct 31, 2008 | 2001 GMC Yukon

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