lt1z

I have no regrets going AT4

They are very similar. I have the GM version and Im happy with it. Can’t go wrong with either if you are looking for a more mild sound upgrade.

I have more then 10K on these with none of those issues. [emoji2373]

I have been happy with my Readylift UCA and leveling kit

35% on the fronts. Stock tint in the back.

Readylift AT4 Leveling Kit 33”

Pacific Blue but same code ;)

That is correct. The cost will likely be too much for the bolt on guys.

What I said is serious mods that absolutely require tuning like blowers, turbos etc. Intake and exhaust can be installed without tuning even though tuning would help.

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Well I myself have but beyond that Houston House of Power and others have as well. The average intake and exhaust guy will not pay the $2800-3000 it takes to tune one of these trucks. Serious mods requiring tuning would be things like boost from supercharger or turbo kits that are in the pipeline but not yet available. We are not talking about “canned” tunes here. Given that GM GDS is need to even swap the unlocked computer in, that market will not work with these trucks. The install of the ECM and tuning needs to be done at a shop in house with capabilities to do so, at least with the current tuning option available via HP Tuners.

Not true. Tunes have been written to these trucks already. Just not a large amount due to cost of entry and lack of serious engine mods requiring tuning being available at this time.

Racing teams even at the lowest level are not using the factory ECM. They are all on Motec systems. GM just increased security due to over the air hacking potential and increased emissions scrutiny. These decisions are not driven in any way by the aftermarket.

Fuel Nitro 20x9 with 33” Ridge Grapplers and the Ready Lift AT4 front 1.75” level.

E load range ...

$1400 to unlock the ECM you send in from your truck. Then $500 in credits to license it. So $1900 if you know how to tune it yourself and have an mpvi2. If you don’t then expect to spend closer to $3000.

Im happy with my Leveled AT4 on 33s using the ready lift kit. I dont think I would want it taller.

One thing to add. You cannot replace the ECM unless you have both a GM service tool and HP Tuners. So you can’t send it out and replace it on your own and then drive it stock until it is tuned. The shop tuning it will need to do it all. This will also leave out the part timers who have HP Tuners with an older interface or no access to GM service tools. 16 was the end of the traditional GM security that was able to be unlocked on the fly..... Similar things need to be done with newer Dodge/Ram and Ford will follow shortly...

There will be no handheld tuners for $500 available. The only way to do it is the way that HP Tuners does it which leaves out anything other then unlocking the ECM and having someone who knows the GM DI vehicles program it, unless you have that knowledge yourself. $1900 bare minimum if you can do it yourself. Closer to $3k if you cannot. Also the 19 TCM is not a T87A so no unlocking is available on that yet. Just the E90 ECM fir now. I will be putting a Whipple on my AT4 in the next 60-90 days and tuning it myself. Hoping the TCM unlocking will be available by then.

They are adding a Whipple 2.9 now that tuning is a available.

12K and no issues so far

I bought mine with 20s but ended up with aftermarket 20s

That js a bad idea. You need to use wherls that either clear the 19 caliper or clear with a small spacer. I am running a Fuel wheel that clears. It is tight but enough.

You have to pay for labor if you have them install it but the re tune flash is covered in the price of the CAI. I installed mine myself and took it to the dealer for a re flash only which is covered with the labor code.

The the best of my knowlege it is about the factory equipped tire. 20” wheels with 275/60/20 tend to be 112mph 18” wheels regardless of tire 98mph The 22” 265/50/22 with Alenza tires also 112