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I just had the rear end replaced in my 2007 Yukon, 4WD w/3.73 gears. Had towed a Pace box trailer several times to Texas and back. Tech said the flat front of the trailer provided a high wind load on vehicle. He said they are changing front and rear diff fluid from the stock 75w-90 synth to...

My 2007 Yukon 4 WD with 3.73 gears and 60,700 miles was just in the dealer's for a rear end rebuild. Started hearing some noise from rear end a few weeks ago. Had tires rotated but didn't help. I checked rear end fluid and it was full, but there was a LOT of filings on the end of the magnetic...

Same thing happened on my 1999 K2500 Suburban. Gas gauge started vibrating rapidly in Dec 2006. Took it to dealer - they diagnosed and installed a new gauge cluster. Problem fixed.

I've used WD-40 on a soft rag, followed by Meguire's cleaner/wax.

The torque management system probably reduces the risk of power train failure enough to allow them to offer their 100,000 mile power train warranty.

I had changed my oil every 3,000 miles in every car I owned for over 50 years, and have come to the conclusion that with today's improved oils, engine materials and technology, it's a waste of money (and oil). I now use synthetic oil and change it when my oil life indicator shows 5 - 8% remaining.

Don't know about the 2008s, but the 2009 Yukon Hybrid comes stock with P265/65R-18 tires. The non-hybrid still has P265/70R-17 shoes. Maybe the different profile makes the wheel well openings look different. I also see an option for a spare tire and wheel for $995 on the 2009 Yukon Hybrid.

I've had two sets of Michelin LTX M/S on my 1999 GMC Suburban K2500. First set was fine; second set developed cracks in the sidewalls at an early age. A few hunderd miles ago I ditched the cracked Michelins in favor of Goodyear Wrangler Silent Armor Pro Grade (Pro Grade for the 3/4 ton load...

Goodyear Wrangler Silent Armor.

Not sure about the 5.7L, but I have had several intake manifold gaskets replaced in my 1999 7.4L Suburban since it was new. The last replacement was in Dec 2005, the dealer did the work. They replaced both the upper and lower intake manifold gaskets (I have a two piece intake manifold on the...

Probably this time next year for the same deep discounts. But I remember that GM had a nice sale on President's Day last year, so I bet they will again come this February.

I found that the TPMS seems to react quicker to deflating the tire, so that's how I retrain the system. It only takes letting out 4 psi or so to get the system to recognize each tire, so it goes pretty quick. Plus you don't have to drag an air hose around to each tire if you are trying to use...

My 2007 Yukon did the exact same thing last winter. It was very cold outside, the Yukon spent the night in the driveway. I tried to remote start it in the morning. It started and ran for less than 5 seconds, then turned itself off. I tried to remote start a second time - it would not crank -...

Vararam Intake The folks at Vararam have an interesting intake they call Tri-Power for the new GMC/Chevys. Their site is at www.vararam.com/tri-power/tri-power.html.

I had that happen to my 2007 Yukon about a year ago, and noticed I had some other issues. In my case, it was only the two front doors that would not lock. The two back doors and the tail gate would lock, but not the front doors. I got back in the vehicle and tried to lock the doors using the...

I, too, have a 2007 GMC Yukon - took delivery on it in March 2006. I have been running it on E-85 almost exclusively since we bought it. Only times it has had gas in it is on long trips when E-85 isn't available. More and more stations in my area (southeast AZ) are selling E-85, and they get...

I just replaced the engine in my 1999 K2500 Suburban. Went with a new stock replacement from GM - L29GW 454 ci. This crate engine came with a 3year/100,000 mile factory warranty. I had the local dealer do the work. The long block cost me $5,140, and I received a $300 credit for the old core...

Yes, you must have an active OnStar service - cheapest is their "Safe and Sound". Then you can add the vehicle phone to your Verizon Family Plan (if you have that) for $9.95/month and share your pool of family minutes - it's just like another cell phone on the Family Plan.

Ordering an '08 About a month ago, we were looking at purchasing a new '08 Yukon XL. A local dealer told me I could order a new '08 as late as early June. I was working with the Internet/Fleet salesman via the COSTCO buying program. He was very amenable to us ordering a new one - as opposed...

I've had the same thing happen a couple of times with my '07 Yukon. While listening to an XM station, the radio gets a mind of its own and reverts to 840 AM. I noticed on AllData that GM has a Tech Service Bulletin on this. Even though I subscribe to AllData, they only make TSBs that are two...