2019 Sierra AT4 level/wheel/tires mod

[JSBAT4]

Has anyone put 285-75-r18s on their truck?  I've had my AT4 levelled and wondering if these would fit without issue?

 

I prefer to stick with the stock wheels as i prefer the extra tire/side wall compared to an r20

[JSBAT4]

Has anyone put 285-75-r18s on their truck?  I've had my AT4 levelled and wondering if these would fit without issue?

 

I prefer to stick with the stock wheels as i prefer the extra tire/side wall compared to an r20

[Wormydog1724]

I need to get the 1.5" Motofab. Looks like it really improves the truck's look and stance. Does it affect MPG's any?

[nwscoobie]

Has any tried putting a 35/12.5/R20  on a 20x10 -18 offset with the SST kit? I am having zero luck finding this with my wheel specs. Mostly just people putting 35's on stock wheels NEED SOME HELP!!

[nwscoobie]

295/60/20

20x10 -18 offset

 

Basically cut the whole mudflap off and did much trimming but I was able to get this combo top work without anything too major the 35/12.50/20 would have been difficult with less offset. 

[Delson0]

has anyone taken out the rear blocks to level by any chance? or replaced with a small one?

[Bigblue87]

Could any of you that have an AT4 with the 6.2 and larger tires answer the below questions I have:

 

-what type of gas mileage are you getting going 65/70 on the freeway?

-did you notice a large power difference? With the higher gear ratio of 3.22, curious if you need re-gearing. I am hoping the 10 speed tranny really helps out here. 
 

I have a 2019 GMC AT4 with a 6.2 and looking  at putting the 4” BDS lift kit on and running either 295/65/20 with 20x9 and 5” backspacing or 295/70/18 with 18x9 and 5” backspacing if they fit with new steering knuckle. Still debating between the BDS rear shocks or upgraded fox 2.0. 
 

Any feedback would be greatly appreciated. Thank you. 

[Sanfermin13]

On 6/19/2019 at 7:01 PM, Canmaverick said:

Just picked up My new At4! And loving every minute of it! 

20x9 Fuel’s

275/65R20 KO2’s

 

Do you know what offset you got?

[Kanon Morris]

On 9/15/2020 at 1:44 PM, MTindall said:

285/65/r20 Nitto Ridge Grapplers - No lift - No spacers - Stock wheels

 

That's 34.8" Diameter

 

It fits - no rubbing

 

Still no rubbing?

[Klutch]

Might be blasphemy to put on a GMC but I'm thinking about putting replica 22x9's of the Trail Boss wheel seen here https://www.customwheeloffset.com/buy-wheel-offset/94290156502/factory-reproductions-fr94-22x9-15  

 

Anyone think there would be an issue with these fitting a stock AT4?  The example truck (if you looked at the link) has 33x12.50R22LT on the wheels

 

 

Edited August 15, 2021 by Klutch

[Landerso87]

New to the forum, just wanted to give my 2 cents… I couldn’t find confirmation on this anywhere. 
 

2021 AT4, stock wheels, no spacer, Nitto Ridge Grappler 35x11.50x20 fit with as best I can tell no rubbing.  I do have a 2” RC level kit installed. I would say the ride quality hasn’t changed much.. tire is very smooth,  no road noise…

 

 Hope this helps someone out!

[Landerso87]

New to the forum, just wanted to give my 2 cents… I couldn’t find confirmation on this anywhere. 
 

2021 AT4, stock wheels, no spacer, Nitto Ridge Grappler 35x11.50x20 fit with as best I can tell no rubbing.  I do have a 2” RC level kit installed. I would say the ride quality hasn’t changed much.. tire is very smooth,  no road noise…

 

 Hope this helps someone out!

[Josh021]

2020 elevation with gm factory level also added the rl +2 sst. Running 275\65r20 with 2 inch spacers. Waiting on my fuel wheels with -14 offset going to keep the spacers as well. I have a set of 315\70r17 wheels to throw on them.