A Mount Shaped for the Sierra AT4 and Denali Dash
A-Tach #50439 is designed for the factory display area in compatible GMC Sierra AT4 and Denali trucks. It attaches along the left and center portion of the display top, creating a defined location for a separately purchased phone or device holder.
The AT4 and Denali interior differs from other Sierra dashboard configurations. Matching the truck’s trim and the display area shown in the photos is essential when choosing this mount.
Confirm Your Sierra’s Fitment
Mount #50439 is listed for compatible:
This mount is only for the AT4 and Denali configurations shown in the product photos. It is not the mount for other Sierra trims. Compare the shape of your display and surrounding dashboard with the photos before ordering, particularly if you own a 2022 model-year 1500 or a heavy-duty truck.
The mount attaches at the left and center of the display top. Check that this position will accommodate your chosen device and leave nearby controls and displays accessible.
Choose the Holder for Your Phone
#50439 is the vehicle-specific dash mount only. A phone or device holder is purchased separately. Select one that fits your phone and protective case and offers the features you want, such as an adjustable grip, magnetic attachment, or compatible wireless charging.
Find Your Holder.
The mount provides an AMPS-style attachment pattern for compatible holders. Check the holder’s specifications and consider the size of the complete setup at the illustrated display location.
A Practical Location for Daily and Work Use
Whether your Sierra is used for commuting, towing, travel, or work, a dedicated device location can be useful for navigation and other mobile tasks. The vehicle-specific base avoids placing a suction cup on the windshield or relying on an ordinary air-vent clip.
Read the installation instructions and test the mount at the display before attaching your separately purchased holder. Make sure the final device position leaves your view and vehicle controls clear.
If you are unsure whether your display matches the photos, contact A-Tach Mounts with your Sierra’s year, model, trim, and a clear dashboard photo.
Frequently Asked Questions
Does #50439 fit a GMC Sierra AT4?
Yes, for compatible 2022.5–current Sierra 1500 AT4 and 2024–current Sierra 2500/3500 AT4 dashboards shown in the photos.
Does it fit a GMC Sierra Denali?
Yes, for the corresponding 2022.5–current Sierra 1500 Denali and 2024–current Sierra 2500/3500 Denali configurations shown.
Where does the mount attach?
It attaches along the left and center portion of the top of the factory display, in the location shown in the product photos.
Will it fit a Sierra with another trim?
No. #50439 is listed only for the compatible AT4 and Denali configurations. Check the other Sierra mount listings for a different dashboard.
Is the phone holder included?
No. The vehicle mount and phone or device holder are purchased separately.
GTM-KSP4LST
