Thanks valhalla360 that's exactly what I was doing, trying to feather the throttle to keep it locked up in high gear. Yes it was a trip to the desert, but this time of year the high is only about 72 F. It was definitely cooler than 75 degrees F outside.
As far as the 5,600 weight. Since this Suburban is new to me I was trying to see how well it worked vs my old 1996 Suburban. So I had actually weighed the truck and trailer on my way out of town (my first time ever weighing a loaded setup by BTW) and the trailer was 5680. Wait a minute, no I think you are correct, because I was forgetting the tongue weight which was 1,000 lbs.
I always assumed I was at 6,200 loaded based on guesses and other peoples reported weights on this forum. But looking at my link below I think the trailer actually weighed 6,680 lbs. :S
Here's a link to my weights in another post in this forum.
LinkAs far as pushing the truck to it's limits, I think that probably only comes into play in it's 167,000 miles. The Suburban is a 3/4 ton with a 4.10 gear ratio and rated to tow 10,000 lbs. Oh I also looked today at the Chevy hitch and it is rated for 1,500 lbs weight distribution.
