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    New to the forum and Lift question

    Dealer installed Rough Country 2" and indicated it would not void warranty. Rides as well as stock. Takes a little getting used to with the rake eliminated. Will have to use the down button on the HUD to bring that where you want it in FOV. With the level and the 35's, I lost about 1mpg.
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    New to the forum and Lift question

    I wondered that same thing when I picked up the truck from the shop because I was definitely not looking for that "squatted" look. Tape measure to fenderwells indicated it was very close to the same measurement. Front measurement was 1/16" higher than rear measurement. Measured on concrete...
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    Crank NO Start Issue ??

    Never had an issue with remote starting. Mine always occurred when using the push to start inside the cab. 20% remote start and 80% start from inside the cab. Going on a month now since the dealer "flashed" the ECM without an issue.
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    Crank NO Start Issue ??

    I took my 3L AT4 to the dealer yesterday for the ECM update. Jonslu - what they are saying about longer to startup is exactly what I noticed. Just guessing, but It seems to be spinning over about 20-30% longer before firing up. I had several stops to make around town after the update, so I...
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    Crank NO Start Issue ??

    Thanks jonlsu. GM care and the Dealer both called me this week saying they had a TB on this for an update to the ECM. I plan to take it in and see if that fixes it.
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    New Owner

    Congrats and welcome. Nice color and wheel/tire combination.
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    AT4 Diesel Owner's sound off!

    I changed mine after the first 3k miles and will be changing every 5k miles. Most of my driving is either 2-lane or freeway. Stop & go city type driving accounts for 5-10% of my total mileage.
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    Crank NO Start Issue ??

    Rick, I have tried every combination I can think of to try to determine if it something I am doing incorrectly, i.e. some magic sequence that causes it. It has been over a month now without an incident using the same approach that Carman mentioned. It has never happened to me using the FOB...
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    Crank NO Start Issue ??

    3L Diesel Being an engineer, it sucks listening to it turn over and over without firing. 15 seconds is like an eternity. I am waiting on the day that the starter does not time out and it just keeps turning over until it saps the battery.
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    Crank NO Start Issue ??

    I purchased my truck in March 2021. I have 11.5k miles on it now. The "crank no start" has occurred 8 times thus far. I have taken the truck to the dealer, and the dealer continues to say GM has not pushed a fix out for the issue. The GM bunch is telling me to take it to the dealer. Virtual...
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    New to the forum and Lift question

    Rough country 2" additional installed by dealer and was told that would not void warranty. Regular driving, speed bumps, driveways, full turn - no rubbing. I am taking it to our farm over the 4th weekend and will put it through the "ditch" test to check the clearances under suspension compression.
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    AT4 Diesel Owner's sound off!

    2" leveling kit for front. Nitto Ridge 35x11.50x20. Just picked it up this afternoon. Ran the stock setup for the first 5k miles to get a baseline on the MPG. Will have to come back around when I have some data on the new setup.
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    MPGs for 35” tires and level/lift

    Leveled out the truck and put on Nitto Ridge Grapplers 35x11.50x20 on the stock 20" rims. Just picked it up this afternoon, so nothing to report on the mileage. I was averaging 23.1 mpg in mix of freeway and city on the stock setup.
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    New to the forum and Lift question

    I decided against the reverse level. Went with 2" more in the front and Nitto Ridge Grapplers 35x11.5x20 on the stock 20" rims. Measuring 41 1/4" to fenderwell front and rear. Just picked it up this afternoon. More to come on mileage impact.
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    New to the forum and Lift question

    Picked up my 2021 AT4 with 3L this past week. Most are looking to go higher with more clearance for larger tire/rim packages. I am considering taking 1/2 to 1" off the rear to level the truck (mill the blocks down to get the appearance where I want it). Driveline geometry (angle of drive...
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