AT4 versus Denali

[ducfan]

Trying to understand some of the technical differences between the AT4 and Denali models. Assuming both are set up the same (Mag ride / Air ride, 4WD, all towing upgrades), are the suspensions and ride heights markedly different? I don't see these things on the GMC web site when I try to compare models. I really want a second row bench seat, and that appears to be easiest to pick with the AT4 rather than the Denali models.

 

[Big Mama]

Might be easier to pull them up split screen on your laptop or something similar. They’re both highly optioned rigs. Seems I read somewhere that the engine options are different as is the suspension set up.

 

[TrueAt1stLight]

Optioned the same, the 2021-2024’s at least, are identical. I believe the same to be true with the 2025 model year however I have not owned one yet. (My point of reference was a 21 and 22 Denali and now a 24 AT4 XL.)

Exterior and interior styling are obviously different but mechanically they are the same I believe.

Curiously the 21 and 22 Denalis I had exhibited what I’d generically call “cowl shake” almost like a convertible car. I attributed this to 100% related to the 22” rims as I actually ran 20” AT4 OEM rims as my winter setup and it went away. My 24 AT4 XL has none of that, however it rides on the OEM factory 20” rims. Incidentally the 21 had it worse than the 22 by a slight degree.

 

[ducfan]

Optioned the same, the 2021-2024’s at least, are identical. I believe the same to be true with the 2025 model year however I have not owned one yet. (My point of reference was a 21 and 22 Denali and now a 24 AT4 XL.)

Exterior and interior styling are obviously different but mechanically they are the same I believe.

Curiously the 21 and 22 Denalis I had exhibited what I’d generically call “cowl shake” almost like a convertible car. I attributed this to 100% related to the 22” rims as I actually ran 20” AT4 OEM rims as my winter setup and it went away. My 24 AT4 XL has none of that, however it rides on the OEM factory 20” rims. Incidentally the 21 had it worse than the 22 by a slight degree.

Thank you, this is helpful. I seem to be able to option the AT4 the way I want (second row bench, LZ0, trailering enhancements, console lock box, no super cruise). Denali is tougher to option that way, especially if I choose the XL.

 

[ducfan]

Optioned the same, the 2021-2024’s at least, are identical. I believe the same to be true with the 2025 model year however I have not owned one yet. (My point of reference was a 21 and 22 Denali and now a 24 AT4 XL.)

Exterior and interior styling are obviously different but mechanically they are the same I believe.

Curiously the 21 and 22 Denalis I had exhibited what I’d generically call “cowl shake” almost like a convertible car. I attributed this to 100% related to the 22” rims as I actually ran 20” AT4 OEM rims as my winter setup and it went away. My 24 AT4 XL has none of that, however it rides on the OEM factory 20” rims. Incidentally the 21 had it worse than the 22 by a slight degree.

Also, can you tell me what tires you had / have on both the 20" and 22" wheels?

 

[DontTaseMeBro]

Optioned the same, the 2021-2024’s at least, are identical. I believe the same to be true with the 2025 model year however I have not owned one yet. (My point of reference was a 21 and 22 Denali and now a 24 AT4 XL.)

Exterior and interior styling are obviously different but mechanically they are the same I believe.

Curiously the 21 and 22 Denalis I had exhibited what I’d generically call “cowl shake” almost like a convertible car. I attributed this to 100% related to the 22” rims as I actually ran 20” AT4 OEM rims as my winter setup and it went away. My 24 AT4 XL has none of that, however it rides on the OEM factory 20” rims. Incidentally the 21 had it worse than the 22 by a slight degree.

The main difference is that the 21-24 Denali has a bespoke interior vs all of the other trims.