firedab

I get many compliments on my Brownstone... Great color choice!

Thanks! Check out this thread, has all the information on a couple size tires...

2020 Brownstone Metallic 3500, Fuel Blitz 22x10...

Build date was 08/19, but have since traded in for a 3500, build date of 09/20 and they both behave the same. Just came back from a trip in the mountains, pulling my trailer and I will agree grade braking works great, but on level ground, it is just not assisting. Its clearly the programming and if they would just reprogram it to downshift on level ground when in tow mode and EB on, it would make such a difference... IMO

Yup, that's them... They come riveted together, so I drilled out the rivets and attached just the back section.

Bought them with my points thru GM accessories website, not sure part numbers.

So I bought the wider OEM mudflats and they are actually 2 pieces in the front. I took them apart and heated up the edge and folded it a bit to make it look better. So far so good, does not appear to be rubbing.

Ride is similar, you can feel the bumps a bit more, nothing crazy. Not much louder with the Nittos either. I did the DIY route, may change them out for the actual kit, but it works...

Yup, those are the wheel and tire specs, and no leveling kit, but I did turn the keys (bolts) two turns, have about an inch difference between front and rear. I’m going to work on mud flaps tomorrow, I’ll post when I get them done.

Here are some more pics...

Ok, got them on... I ended up moving the front bumper forward about 1/2", took front mud flaps off and will modify them to eliminate the rub there. Minimal mods to make this work. They do stick out a bit more than I would prefer, but I'll get used to it... Looks great, now debating on adding the 3/2 lift?!?

So, I have recently upgraded from my 2020 Sierra Denali 2500 to a 2020 Sierra AT4 3500. My 2500 had what I felt, no difference between on or off of the exhaust brake. Either empty or towing, same nothing from the brake. I will say the descent braking is the only thing that does work. Empty or towing with exhaust brake switch on or off, it would always downshift as soon as I tap the brakes while going downhill, which is what my 2015 did on level ground with exhaust switch on! My 3500 only has 350 miles on it and I have not towed with it yet. But, I can tell you the switch on or off does not make a difference so far not towing.

Had a 2016, exhaust brake worked wonders, barely had to use the brakes, then upgraded to 2020 and I lost the exhaust brake! I feel the switch is just a dummy switch now, does nothing to help slow the truck down, and I tow 10k pound trailer all the time, I can tell you loaded or empty is absolutely the same. Wish they would let the engine brake be an engine brake, and reprogram it to work like it used to in the older generation trucks.

I just ordered 22's but debated for a while. Hope they turn out like i'm expecting! 22x10's -18 and 285/55R22 Nitto Ridge. I have no leveling or lift kit, will see about the rubbing. Those tires from what I read should work with minimal trimming. I'll let you know and post a pic when they get here...

Any more info on this? Still not seeing a +13 offset available in a 22 on their website...

So I have a 2020 Diesel with the exhaust brake which I believe is weak at best. I had a 2016 prior to this and test drove a 2017 before buying the 2016, and here is what I noticed. The 2020 has barely any exhaust brake compared to the prior years. When I'm towing 10k lbs or riding empty, my 2016 would downshift when the exhaust brake was turned on, sometime really aggressively reving up to 2500 RPM's or more depending on situation. When I test drove the 2017 which was obviously empty and not towing, with the switch turned on, I would tap the brake and it would almost come to a complete stop never having to touch the brakes until the very end. The 2020 with the switch on or off is almost the same, not downshifting and barely assisting in stopping, even with 10k lbs pushing it! I have not seen it downshift past 1500 RPM once on level ground. Now, in the mountains going downhill and either with or without the exhaust brake switch on, it would downshift and hold the speed, and even slow down. Is anyone else who pulls some weight noticing this? It would be most noticeable if you came from a 2016 or newer. I know the engine was updated in 2017, and now the 2020's have a newer transmission, but the brake assist is very weak IMO. I did take it in for service and had them look at it, which they said was operating normally and not showing any codes. Just a little disappointed...

I added one layer of vinyl tint. Looks much better...

I have searched and searched and cannot find the wiring diagram for this new radio! I'm trying to add a small sub to my daughters truck and want to tap into the wires behind the radio. Anyone know where I can find this info? Thanks!