Posts: 333
Location: menasha wi 54952 | I have a 2007 GMC Yukon XL with the 5.3L engine. I pull a Ranger 692. I would not recommend this engine to pull this much load. Its pulls it but not very well. Like the above posts there are more to your questions that need to be answered but here goes:
Any problems? Yes. This engine does and will burn oil. I had mine documented at the GMC garage from day one. It took years of documented GM testing and factory fixes but I did get a new engine out of it. I had many other problems with this vehicle but after all the new product bugs were worked out it seems to be problem free now at 75K miles. I would make sure you run a car fax report before buying. I would not recommend this vehicle for towing. I have pulled my rig with the larger GM engine and the Ford Ecoboost without any trans shifting. The Fords are better as they generate their horsepower at much lower rpms.
Can you tow in overdrive? No you cannot. GM does not recommend this at all. Your truck will shift differently from stop to highway speeds but will actually drive at "Overdrive" rpm when it can.
Can you run with the cruise on without the trans constantly shifting? No. The trans will constantly shift, at highway or interstate speeds, with this much load. If you are pulling at 55 - 60mph, it trailer mode, it will not shift as much. If you were to travel from Green Bay WI to International Falls MN with the cruise control on, you will end up taking the cruise off due to all the trans downshifting going on. It will kick up to max rpm with hills and winds encountered.
Hope this helps and good luck.
MR
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