On my past 3 vehicles, I had a dedicated set of snow tires. G8, CTS-V Wagon and SS Sedan, all were tanks in the snow with their snow tires. As mentioned before, snow tires are better in all cold conditions than any all season tire can ever hope to be. That said, I won't be getting anything for the truck to replace it's stock Bridgestones that are on there already. I'll just drive slower and more careful in the times that we get bad weather.
So you drove what is the equivalent to a Denali around town. Which probably has magride. And a 6.2L. And a 10 speed. Then you bought an SLT and are surprised that it drives really different? Am I confused here or?? My '18, the screen is perfect, I can't see that they regressed on this. I use CarPlay all the time however, so maybe that's masking things for me. In this age though, if it's available, you should, for sure, be using Android Auto or Apple CarPlay all the time. There's no real reason not to.
You probably didn't need the ballast in the G8 with the snow tires. I know because I had one, with non-studded snow tires (Michelin X-Ice Xi2). But, I bought end of Jan and didn't do anything special; just put the truck in Auto when it was snowing out.
Be aware that headers are made to fit the vehicle, not just the motor. Just because the same motor is in two different generations of vehicle, does not mean that headers will fit between the cars. I had headers on my 2008 Pontiac G8 GT. Those headers would not work on my 2016 Chevrolet SS, despite both cars being LS V8s with the same overall exhaust port design on their heads, and both vehicles being a Holden Commodore manufactured in Australia. The G8 is a VE Commodore, the SS was a VF II Commodore. Now, shorties? May fit between generations, but IMO shorties are a waste; if you're going to get headers, get long tubes.
Yeah, rotating mass. Wish the Denali didn't have 22" wheels as standard. I wish I had 20" wheels so it rode better and got marginally better mileage. Though I guess I can't complain, I just averaged 20.5MPG on this tank (according to DIC) which is about equal to what I averaged in my Chevy SS 6M when driving down to my parents.
Oh come off it. Sounds like a dealer issue and not a manufacturer issue. 5100 miles now on my 6.2 Denali CCSB, no issues at all speeds excepting from the occasional harsh. 1-2 or 2-1 shift
Go drive the new Tahoe/Suburban. It has that drivetrain.
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