Like A Rock

The trailers are nowhere close to the rated max towing capacity of the truck (3,000-5,000 lb. loads, tongue weight 10%) I tow a lot during the winter and I like my front end to have near unloaded traction when towing and I've accomplished this with all my GM 1/2 tons using air springs, now I'm at the point where I have to go steel helper springs or remove the linkage for the ARC. I get the same sag when I load a 600 lb. snowmobile in the bed.

Thanks for tthe post Bill, especially after getting confirmation from SD Springs that no one has an air spring option that will work with the Adaptive Ride Control. SD was recommending Hellwig Helper Springs but after seeing your post I checked out SuperSprings and found the video below pretty informative.

I like that, where did you get it from?

Still no reply from Firestone, I think I'm going to disconnect the ARC this weekend and see what if any codes may get thrown to the DIC, and to find out what mode the shocks default to. I really want to get air springs installed on this truck. It really bothers me to be towing while my truck looks like a 30' I/O pushing along at 3/8 throttle.

I'm really happy with the mats, just as good of quality as Weathertech. We play in the snow all winter long, and was just up in northern Wisconsin with 3 grandsons, sand, dirt, candy, gum, beverages, etc. they keep the carpet below protected, get back home shake em out, hit them with the hose and a sponge mop and they look like new, then pop the carpet back in for a "refined suburban look" Good stuff.

I tried contacting Firestone today, was hold on for 25 minutes before there phone system hung up on me, and I also sent an e-mail asking if there air spring will work with ARC, as soon I get an answer I will post the news. I've used Air Lift springs on my Silverado's for 20 years, I was very disappointed when doing the Air Lift springs install on the Sierra and finding the ARC linkage was in the way. My personal truck is used as my wife's DD as her commute is less than 2 miles and the major miles on the truck are used for toy hauling and towing, the sag the Sierra has with a 5,000 lb load is unacceptable, if worse comes to worse I will remove the ARC linkage to make the air springs fit.

Nice looking truck, the Borla sounds great!

Adding a leaf will be my last resort, I checked out Firestone's webpage and they make no mention of the Adaptive RIde Control, I'll give them a call tomorrow. Thanks for the info!

Since 2003 I have added Air Lift springs to the Silverados I have owned with excellent results, hook up a trailer and raise the rear end to the unloaded ride height and all is good, now with this 2021 Sierra Denali 1500 I now own Air Lift does not make a spring that fits a truck with the Adaptive RIde Control (why a P/U truck needs a sport setting is beyond me). In any event does anyone have a solution to eliminating the rear end sag caused when trailering?

I think I posted this issue in the wrong sub-forum, could a mod please move this to the 2020+ Silverado HD & Sierra HD Mods sub-forum. Thank you

Since 2003 I have add Air Lift springs to the Silverados I have owned with excellent results, hook up a trailer and raise the rear end to the unloaded ride height, now with this 2021 Sierra Denali 1500 Air Lift does not make a spring that fits a truck with the Adaptive RIde Control (why a P/U truck needs a sport setting is beyond me). In any event does anyone have a solution to eliminating the rear end sag caused when trailering? Thanks

Does anyone have experience with loading a a snowmobile into the the box of a GMC with the Pro Tailgate? Thanks