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Some of the things available now for our gen are the exhaust gm sells that is supposed to add up to 10hp and 6lb of torque for the 5.3L engine. 2019 Sierra 1500 Crew or Extended Cab Performance Exhaust, 5.3L, Dual Rear, Quad Chrome Tips | 19419435 (shopchevyparts.com) Another fun one that people are using lately is the pulsar LT inline control Module. With several features including adjusting the pedal sensitivity. Pulsar LT for 19-20 GM Gas Trucks - Superchips And last of course you could look into and air intake to pair up well with the exhaust above you can go with the GM intake: 2019 Sierra 1500 Air Intake, Performance, Cold Air, 5.3L Engine | 84789802 (shopchevyparts.com) or with any other competitors. I personally have the Air Aid intake pipe with a drop in Air aid filter only because I found it on a very good deal at 4wheelparts.com plus they claim an additional 8.8hp and 13.1lb torque on the 6.2L so perhaps at least half of that on the 5.3L AIR-200-782_dyno.pdf (kandn.com)

Scored this bad boy from 4wheelparts.com....shipped for free and 5%off coupon code....came out to $187...not a bad deal considering retail is $269. This is the dry filter version. I noticed a bit of more noise of noice of course. Good rumble that is and a cleaner look on the engine bay. They claim 8hp and 13 torque on the 6.2 dyno tests....mine is the 5.3 but I am happy with the quality for the price. Sent from my iPhone using Tapatalk

My 19 8spd/5.3 has been overall very smooth. It has done the hard shift coming out of my driveway very rarely in the 18 months I have owned it. I have 19k miles on it and It sure has been much smoother than my 17 8spd/5.3 Although I do wish I could have the 10speed because if you plan to upgrade tires the 3.23 gears will go better with those extra speeds. Sent from my iPhone using Tapatalk

Yes sometimes it rubs on the fender liner at full lock turns. No biggy...i just need to zip tie it a bit back further.

Beautiful truck...love the black wheels. 1.5” should be fine....2” many reported upper arm failures...they to sell the 1.75” ready lift that includes the upper arms but does nothing to correct the cv angles. So in my opinion a 1.5” puts a tad less stress the cv joints and ball joints. You could throw in the 1.5 with upper control arms as well....that’s my plan. Leaning towards rough country. They have a nice setup and have great reviews.

They don’t look bad but there has been alot of UCA failures with 2” of level on At4 and TB....I am planning on upgrading to the Rough Country arms even though I have the 1.5”....it will make me feel safer on longer road trips.

This is leveled with the stock duratracs.

Here you go....this is now with the level 1.5 and 295/70r18

I haven’t but according to tiresize.com my 3.23 gears need to be changed to 3.42 to be okay with my 34.25” tires. I think 3.73 and you will be fine. 4.10 might be overkill especially on gas mileage.

I have had the 1.5” level for a year now and about 12k miles. I would still like to upgrade the UCA just because of the failure’s I have seen on FB but you are correct all the one’s I have seen failed are 2” level spacers which is what may be helping my controls stay okay so far. Hope it stays that way until I upgrade

The upper control arms only fix the upper ball joint angles but the cv angles are not addressed at all. That’s why I kept my 1.5” motofab level and plan to simply upgrade my control arms. The 2” kits do come with control arms already but they also push those cv angles another half inch and I like how my angles currently look. Now 35x12.5r18 are pretty wide depending on the brand...so they may hit on the upper ball joint which could be fixed with some wheel spacers. My 12” wide tires are about 3/8” away from the ball joint. They 35s are typically 34.5” tall so you would probably rub on the fender liners or mud guards. My 34.25” tall tires have about a 1/2” on each side at full lock. I guess what I am trying to say is go look on tiresize.com or the manufactures website for the actual specs so you can see what are it’s true dimensions. Sent from my iPhone using Tapatalk

The duratracs are narrower at 11.8” than my cooper evolution MT at 12” however they are slightly taller at 34.3” vs 34.25” not a big difference but without a level they may rub. Although as you mentioned there has been members running this size with no trouble and no level as you wish. You have the trailboss which I believe has more space. You could have discount tire test fit them if you have one near. Or if you decide to order them, well worse case scenario you slap in a level perhaps just a 1” to help with the clearance. Sent from my iPhone using Tapatalk

1.5” motofab level. With the GM “lift” that this the AT4/TB come with my ball joints were completely flat. After the 1.5” lower spacer they moved a bit still look good. The cv angles also were flat before and look decent after level. The 2” from ready lift does correct the control arms with new replacement but pushes the cv angles even more. So I plan to replace the UCA in the future perhaps but maintain my 1.5” level. Sent from my iPhone using Tapatalk

1.5” motofab level Cooper Evolution MT 295/70 Zero rub Sent from my iPhone using Tapatalk

Have been running motofab level for a year now on stock duratrac. Just installed 295/70 cooper evolution MT and they clear very well. They are 61.5 lbs which are pretty light compared to others in the same specs weighing on 70+....they measure 34.25”x12”....I could install a 1/4” or 3/8” wheel spacer but I think I will leave it like those for now. No rubbing on UCA so far all good. Sent from my iPhone using Tapatalk