2001 GMC Yukon - 5.3L Howling @ Startup?

eber01 · Post by **eber01** » Fri Jun 10, 2011 3:47 pm

I have a GMC Yukon that howls/whines at start up. After a few minutes it stops. The noise is coming from a valve at the right side under the hood on top close to the fire wall. Can anyone help me with the name of this valve.

steven kiser · Post by **steven kiser** » Sat Jun 11, 2011 5:28 am

need a bit more information

ricmorin · Post by **ricmorin** » Sat Jun 11, 2011 5:54 am

Yes, a year and an engine size would be helpful. Where exactly is this bolted?

fortknoxx · Post by **fortknoxx** » Tue Jun 14, 2011 10:35 am

i bet it's green.......

steven kiser · Post by **steven kiser** » Wed Jun 15, 2011 2:07 am

ahhh, the good old green muzi ford. this made me think of the goods old "parking lot" painters. i wonder how those whiz bangs are doing. are they still hanging around home depot ar have they returned to their native land by a plane ticket from the i.n.s. a walk down memory lane when simple things made us laugh.........

timbre4 · Post by **timbre4** » Wed Jun 15, 2011 4:48 am

An email was sent to the original poster to circle back and provide more info for people that want to help on this repair.

eber01 · Post by **eber01** » Wed Jun 15, 2011 3:29 pm

Sorry, I'm a lot more professional than that. I also need to use this forum. This was Duhhhh moment. 2001 gmc Yukon 5.3.
Thank you all so much for your help.

Tim Martin · Post by **Tim Martin** » Wed Jun 15, 2011 6:07 pm

Could it be the Secondary Air Injection Pump? It has 2 wires connected to it if I recall correctly.

fortknoxx · Post by **fortknoxx** » Thu Jun 16, 2011 6:26 am

for some reason that rings a bell...... I think there was a campaign out on the pump. if mammary serves me correct, i think it had issue with water in the pump. don't remember how it got there.

liljoe · Post by **liljoe** » Thu Jun 16, 2011 7:19 am

If you could post a pic of it I bet you would get an answer in no time.

steven kiser · Post by **steven kiser** » Fri Jun 17, 2011 2:22 am

i feel it prudent to mention this. the fan clutch is a real noise maker on these. the "valve" may be vibrating normally and the noise associated with it. i could fill a dumpster with these fan clutches that i've replaced. if this is the case beware of damaging the transmission lines and take real care in threading the clutch on the pump. i drip dish washing detergent on the threads. makes it a whole lot easier. seems to work better than oil..................

2001 GMC Yukon - 5.3L Howling @ Startup?

2001 GMC Yukon - 5.3L Howling @ Startup?

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Re: GMC Yukon - Howling @ Startup?

Re: GMC Yukon - Howling @ Startup?

Re: GMC Yukon - Howling @ Startup?

Re: GMC Yukon - Howling @ Startup?

Re: GMC Yukon - Howling @ Startup?

Re: GMC Yukon - Howling @ Startup?

Re: 2001 GMC Yukon - 5.3L Howling @ Startup?