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99 Yukon making scary engine noise at start up then goes away

11 messages,  Last post on Nov 23, 2009 at 8:06 AM

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What is this discussion about? GMC Yukon, GMC Yukon Denali, GMC Yukon XL, SUV

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#8 of 11 2002 gmc yukon with engine noise by tonazme Jun 23, 2009 (5:45 am)
I too have a Yukon with this loud clicking noise upon start up of my vehicle. It does get quieter as the engine warms up. We bought it used last year and noticed noice after first oil change and has gotten progressively worse. We feel it was hidden by the dealer with maybe some heavy weight oil. Only 64K miles! Spoke to GM about problem and dealer. Dealer said that "pistons are shorter on Yukon causing this piston slap" stated that GM sent memo's out that repairmen are not to even attempt to repair problem and that this is "normal" engine sound for the Yukons. Has anyone else had this trouble? I'm just not satisfied with this explanation. Replies to this message: kcjeff (Jun 23, 2009 4:01 pm) yukondriver (Nov 21, 2009 7:09 pm) rsht (Nov 23, 2009 8:06 am)
#9 of 11 Re: 2002 gmc yukon with engine noise [tonazme] by kcjeff Jun 23, 2009 (4:01 pm)
Replying to: tonazme (Jun 23, 2009 5:45 am) Yeah, I wouldnt be satisfied either. I would take it to a different GM dealer and see what they say. Seems like if that was the case it would be a constant slap instead of getting quieter as it warms up.....   I been putting resolin oil additive in mine. Seems to do the trick. Last oil change I used Lucas and it didnt do as well. Im afraid to flush the engine. In fear of making the problem worse. I've heard and witnessed horror stories about that.
#10 of 11 Re: 2002 gmc yukon with engine noise [tonazme] by yukondriver Nov 21, 2009 (7:09 pm)
Replying to: tonazme (Jun 23, 2009 5:45 am) My Yukon has done the same on cold start since I bought it at 44K miles. Now 156K, it may have gotten slightly worse over the years but clears in about 30 seconds. I have a GM dealer in the family and will inquire about GM's practice on notifying dealers and dealers' retention requirements of such communications. Replies to this message: rsht (Nov 23, 2009 8:06 am)
#11 of 11 Re: 2002 gmc yukon with engine noise [yukondriver] by rsht Nov 23, 2009 (8:06 am)
Replying to: yukondriver (Nov 21, 2009 7:09 pm) I have a 2007 Denali, the engine does the same thing when its cold, but once warmed-up, all is fine. In my opinion, its a non-issue. Just take it easy at first until the engine is fully warmed-up before trying break a 0-60 record.. LOL. Happy Thanksgiving!

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