Last post on Mar 27, 2013 at 1:10 PM
You are in the GMC Yukon
What is this discussion about?
GMC Yukon Denali, SUV
Go to NHTSA to file a safety complaint.
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#963 of 1091 Re: 2004 Yukon XL Denali - Low Oil Pressure [denalidb]
Jul 26, 2011 (1:25 pm)
i've always changed my own oil and i've had 4 gm cars i have a 2003 gmc yukon denali now with 280000 miles on it and it has always had metal on the oil plug and all the gm cars i've had was the same way. your 6.0 liter was made to run on 5w30 so changing it to 10w30 isn't good for it, i've noticed too that the more miles they get on them the less metal there is. a gm dealer only charges a few dollars more to change your oil and would probably be worth it because they don't usually drain your differential or work you up over metal being in the oil and then put the wrong oil in it. I think the 10 min oil change is the reason alot of people are here.
#965 of 1091 2006 Denali "Jerking" occasionally
Aug 10, 2011 (2:41 pm)
My Denali will jerk a little bit every once and a while when accelerating. I think it's the transmission, but I am not for sure. Any suggestions of what is causing it? Thank you!
#966 of 1091 Re: 2006 Denali "Jerking" occasionally [kylie_ffr]
by Mr_Shiftright HOST
Aug 10, 2011 (8:23 pm)
If it's not shifting into another gear when you feel this "jerk", then it's probably an ignition misfire. Go to Autozone or Kragen and get the car scanned for a trouble code. I bet a misfire code will come up.
#967 of 1091 Re: 2006 Denali "Jerking" occasionally [kylie_ffr]
Aug 11, 2011 (8:26 am)
Please keep me posted if you have the vehicle diagnosed and when the problem has been taken care of.
Caron, GM Customer Service
Aug 11, 2011 (2:02 pm)
My gas mileage dropped over 5 miles per gallon from one tank of gas to the next. Any ideas what could cause such a sudden drop.
#970 of 1091 Re: Gas Mileage [02yukonxl]
by Mr_Shiftright HOST
Aug 11, 2011 (7:15 pm)
bad math? Juuussst kidding. You really can't gauge fuel mileage from one tank to the very next one. You should average it out over 5-6 fillups at least. Reason? Changes in the car's position during each fill up, different road and climate conditions, and sometimes a misbehaving gas pump.
#971 of 1091 Re: Gas Mileage [02yukonxl]
Aug 28, 2011 (2:11 pm)
I have seen drops and gains between tanks but never that much(could check sensors aswell). However in my area I work at a small engine repair shop and we have found water freshly purchased from a nearby gastation containing water, ALOT. I have a 2003 Tahoe and after letting it sit for a few months i believed moisture built up in the tank (ethanol), My truck Ran HORRIBLY and was even stalling here there.....4 cans of seafoam and a fresh tank of high oct to clear things through and it was running like a top....