Level kit install

thsoccer3 · June 25, 2019

So far I only see 1 front level "approved" by the manufacturer for the AT4 -- Rough Country SKU: 1318.

My dealership has 3 leveled AT4s on the lot, and states the level kit will remain under factory warranty if installed and aligned by them for $875. I am yet to verify this part number and take measurements of the trucks on their lot (I am away at work for a couple of weeks), but the parts department just stated they are using Pro Comp part number 63235, a 2.25" level.

Any thoughts?

bullet3z · June 26, 2019

I have read this thread front to back a few times. It looks like a lot of you guys have the Trailboss or AT4s. I have a RST Without the Z71 option. I want to do a 1 1/2 front kit, but I am not sure which one to get? Which one would be better for me, the upper or lower kit? Also any links to the correct kit would be great.

asalinasz39 · June 26, 2019

40 minutes ago, bullet3z said:

I have read this thread front to back a few times. It looks like a lot of you guys have the Trailboss or AT4s. I have a RST Without the Z71 option. I want to do a 1 1/2 front kit, but I am not sure which one to get? Which one would be better for me, the upper or lower kit? Also any links to the correct kit would be great.

https://www.ebay.com/itm/1-5-Front-Leveling-lift-kit-for-Chevy-Silverado-2007-2019-GMC-Sierra-GM-1500-LM/322399957905?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

Here is the link lower strut spacer. 1.5" easier to install than the top spacer.

asalinasz39 · June 26, 2019

21 hours ago, thsoccer3 said:

So far I only see 1 front level "approved" by the manufacturer for the AT4 -- Rough Country SKU: 1318.

My dealership has 3 leveled AT4s on the lot, and states the level kit will remain under factory warranty if installed and aligned by them for $875. I am yet to verify this part number and take measurements of the trucks on their lot (I am away at work for a couple of weeks), but the parts department just stated they are using Pro Comp part number 63235, a 2.25" level.

Any thoughts?

2.25" for the AT4 or TB...I say would be too much. Their has already been one case reported here with clunking noise on a 2" level spacer.

1.5" has been ran from several for at least 5K miles with no issues claimed so far.

thsoccer3 · June 26, 2019

Thank you!

I think I am leaning toward the Rough Country 1318, and will allow the local accessory shop to install and pray for no issues or warranty battles.

bullet3z · June 26, 2019

28 minutes ago, asalinasz39 said:

https://www.ebay.com/itm/1-5-Front-Leveling-lift-kit-for-Chevy-Silverado-2007-2019-GMC-Sierra-GM-1500-LM/322399957905?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

Here is the link lower strut spacer. 1.5" easier to install than the top spacer.

I called Motofab for their opinion. They advised me to use the CH-2 kit which is a 2" upper kit. He told me the kit you linked is for the Trailboss.

I am not really worried about which one is easier to install since it will be installed on a lift by a mechanic. I just want to make sure I get the correct one installed.

But thanks either way.

RVR2MTN · June 27, 2019

Has anyone considered leveling their non AT4/Trailboss by installing a front shock and spring assembly from an AT4?

In other words, I bought a guys slightly used AT4 front struts and am going to install them on my 2019 SLT 4x4.

Think I can fit a 285/65/20 on my stock 20” rims?

thsoccer3 · June 27, 2019

36 minutes ago, RVR2MTN said:

Has anyone considered leveling their non AT4/Trailboss by installing a front shock and spring assembly from an AT4?

In other words, I bought a guys slightly used AT4 front struts and am going to install them on my 2019 SLT 4x4.

Think I can fit a 285/65/20 on my stock 20” rims?

I just got off the phone with the Pro Comp technical support rep, and we were just discussing this. It should work. For the record, we were discussing because he said the taller struts are the reason Pro Comp does not recommend their 63235 level for the AT4. He was amazed to hear my dealership is installing and covering under factory warranty.

Dougie86 · June 28, 2019

So can someone explain to me the difference between the trail boss suspension and the at4 suspension. I thought they were exactly the same but according to rough country they are not. Just curious.

NHAT4 · June 28, 2019

3 hours ago, Dougie86 said:

So can someone explain to me the difference between the trail boss suspension and the at4 suspension. I thought they were exactly the same but according to rough country they are not. Just curious.

Sounds like horse sh#t to me.... I'm at work right now an I have a 2019 AT4, and a coworkers 2019 TB. I just looke under them and same control arms and same strut part #s...

Motofabs site list same part # for both too...

thsoccer3 · June 28, 2019

On 6/26/2019 at 12:31 PM, bullet3z said:

I called Motofab for their opinion. They advised me to use the CH-2 kit which is a 2" upper kit. He told me the kit you linked is for the Trailboss.

I am not really worried about which one is easier to install since it will be installed on a lift by a mechanic. I just want to make sure I get the correct one installed.

But thanks either way.

Very weird to hear that Motofab instructed you to use an upper kit, as the only kit shown for the AT4 / TB on their site is the lower mount 1.5".

bullet3z · June 28, 2019

6 minutes ago, thsoccer3 said:

Very weird to hear that Motofab instructed you to use an upper kit, as the only kit shown for the AT4 / TB on their site is the lower mount 1.5".

As was posted above. I have a RST without the Z71 option. So according to Motofab I would use the upper kit.

thsoccer3 · June 28, 2019

Ahh I missed that part. I bit the bullet. 1.5" Motofab lower mount for my AT4 and 295/60/20 Ridge Grapplers on factory 20s. I will install level Monday then bring to tire shop for tires and alignment. Update afterwards.

Dougie86 · June 28, 2019

4 hours ago, NHAT4 said:

Sounds like horse sh#t to me.... I'm at work right now an I have a 2019 AT4, and a coworkers 2019 TB. I just looke under them and same control arms and same strut part #s...

Motofabs site list same part # for both too...

Yea. That what I was thinking. I made a comment on there website saying "aren't the trail boss and at4 suspension the same." And they responded with "not exactly". I don't think they have a clue.

RVR2MTN · July 2, 2019

Following up on my earlier question about using an AT4 front strut assembly to lift a non AT4 4x4 SLT truck...I have done it and here are the results.

Front suspension - stock AT4 strut with 3/8” aluminum spacers under strut on the lower control arm. (I made these on a lathe)

Rear suspension - 2” block kit

Tires - Nitto Terra Grappler 285/65/20 on stock 20” wheels.

This set up has no rubbing at all and has not yet required me to do any trimming.