AT4 overlander

I ordered a SmartCap the same time I ordered my AT4 this past February. The SmartCap was still on backorder when I took the delivery of the truck in May so I canceled it and purchased a Retrax XR tonneau cover and Yakima towers/crossbars. The website still shows it unavailable for the Sierra. They are really nice but seem to be extremely difficult to get. I was recently at the Overland Mountain West Expo and the vendors I talked to confirmed it. So I think it is really a good starting point...if you can get one.
Gracias - what I am seeing as well.
 

I leave for a 6 week trip on the 16th.

Tires are supposed to be installed tomorrow if they fit. I've seen the post where 295/70r18 fit with no modifications so that is what I went for with Yokohama Geolandar MT003's. Had them on my Lexus GX460 build and loved them. If they rub I'll have the RC leveling kit installed with their forged aluminum UCA's.

Quick run down of what I have installed to date.

"Lodging":
Yakima Overhaul HD
Bush Company Alpha Series Tent w/ Scirroco "ceiling" fan
Bush Company 270 Awning
DFG Offroad Shower Enclosure
Decked Drawers
Amazon Diesel Heater - four outlet, ducted to tent and also has ability to provide heat to dining under the canopy. Ducting is 42mm silicone coated fiberglass air duct with inner wire coil. Doesn't kink.

Electrical:
  1. Mounted in Pelican Case:
    • 134AH LiFePo4 battery
    • Renogy 50A DCDC charger
    • Renogy Bluetooth Monitoring
    • Blue Sea Systems Fuse panel
    • Blue Sea Power and ground blocks
    • SAE through wall connectors, Anderson Through Wall connectors and Wiring Glands to get power out of the case.
    • Folding solar panel for just in case. It works great tied to the Renogy DCDC.

Cheap Amazon Lighting Controller - It's been in the elements for 2 years, still works flawlessly.​
All wiring is tinned copper marine cable.​
Cheap Amazon LED strip lights installed in the awning. Cut, soldered, wire loomed etc. on a dimmer.​
Quick charge USB A and USB C outlets installed in the back face of the Decked system. They also have voltmeters built in.​
Cheap LED Pods for emergency use if repairs on another vehicle needed, etc.​
Tent is wired from the battery box.​
IceCo 95 qt fridge/freezer. Has been in the elements for about a year. Not rated as waterproof but it's survived Georgia and Florida rains in the bed of the truck.
I added Air Lift air bags this weekend to help support the load and level the truck back out. So far extremely happy. Will help when towing the boat as well. Can't believe I never used these things before so far.
 

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I leave for a 6 week trip on the 16th.

Tires are supposed to be installed tomorrow if they fit. I've seen the post where 295/70r18 fit with no modifications so that is what I went for with Yokohama Geolandar MT003's. Had them on my Lexus GX460 build and loved them. If they rub I'll have the RC leveling kit installed with their forged aluminum UCA's.

Quick run down of what I have installed to date.

"Lodging":
Yakima Overhaul HD
Bush Company Alpha Series Tent w/ Scirroco "ceiling" fan
Bush Company 270 Awning
DFG Offroad Shower Enclosure
Decked Drawers
Amazon Diesel Heater - four outlet, ducted to tent and also has ability to provide heat to dining under the canopy. Ducting is 42mm silicone coated fiberglass air duct with inner wire coil. Doesn't kink.

Electrical:
  1. Mounted in Pelican Case:
    • 134AH LiFePo4 battery
    • Renogy 50A DCDC charger
    • Renogy Bluetooth Monitoring
    • Blue Sea Systems Fuse panel
    • Blue Sea Power and ground blocks
    • SAE through wall connectors, Anderson Through Wall connectors and Wiring Glands to get power out of the case.
    • Folding solar panel for just in case. It works great tied to the Renogy DCDC.

Cheap Amazon Lighting Controller - It's been in the elements for 2 years, still works flawlessly.​
All wiring is tinned copper marine cable.​
Cheap Amazon LED strip lights installed in the awning. Cut, soldered, wire loomed etc. on a dimmer.​
Quick charge USB A and USB C outlets installed in the back face of the Decked system. They also have voltmeters built in.​
Cheap LED Pods for emergency use if repairs on another vehicle needed, etc.​
Tent is wired from the battery box.​
IceCo 95 qt fridge/freezer. Has been in the elements for about a year. Not rated as waterproof but it's survived Georgia and Florida rains in the bed of the truck.
I added Air Lift air bags this weekend to help support the load and level the truck back out. So far extremely happy. Will help when towing the boat as well. Can't believe I never used these things before so far.
That looks amazing. I too have the Red color. Thanks for sharing.
 

Anyone build and overland AT4? Post pics, Gear, Tips(do’s/dont’s), etc.
Working on it. Not going too extreme with this one, though - only needs to handle two weeks of boondocking at a time.

Currently in the process of selecting a t-slot rack to use with my RetraxOne cover. Might go with Billebars so I can easily add a few tool mounts to the sides, but not sure yet. My primary goal is to keep the tent below the roofline of the cab, so I'm leaning toward a very short rack system (similar to my last Tacoma setup). My tent is just under 11" tall when it's closed, so not much space to work with for the height of the rack.
 

Working on it. Not going too extreme with this one, though - only needs to handle two weeks of boondocking at a time.

Currently in the process of selecting a t-slot rack to use with my RetraxOne cover. Might go with Billebars so I can easily add a few tool mounts to the sides, but not sure yet. My primary goal is to keep the tent below the roofline of the cab, so I'm leaning toward a very short rack system (similar to my last Tacoma setup). My tent is just under 11" tall when it's closed, so not much space to work with for the height of the rack.
I also have the RetraxOne with the t-slots and added the Yakima Overhaul HD with the side bars similar to Coda's. The crossbars can be adjusted lower and by my measurements an ikamper mini would at or just below the cab. Anything longer would of course have to lay on top of the cab. The Yakima works great with the Retrax. I had 4 Maxtraxx on one side and two 4 gal rotopax on the other side. I attached a shovel inside the rack on one side and have a location for something else on the other. I had not purchased the RTT yet however. I apologize that I do not have pictures as set this was set up in the fall to see how it would all fit but I removed it for the winter and didn't get any photos. They are very easy to install and remove. I had shoulder surgery scheduled for December and figured there will be no overlanding for awhile. When I am able to actually use my shoulder effectively I will get everything installed again and post some pictures. Hopefully in the next few weeks. Shoulder surgery suuuuucks! I am very interested in this thread and would love to exchange ideas.
 

Sent a quick email to KB Voodoo and they sent me back some info on a few of their low-profile options that would fit the Sierra 1500 with RetraxOne covers (both with and without CarbonPro bed):

1. KB Voodoo PRO-X 6" crossbars:

2. KB Voodoo Max Modular AluMax 10" Rack:

3. KB Voodoo MAX Modular Attachment Brackets for RetraxONE XR Tonneau Covers:

4. And then BilleBars offers these low-profile 6" cross bars, as well:
IMG_9571a.jpg
 

Super nice rigs all, check mine out... so here is the question, I have a 2023 Sierra AT4 Duramax but when I plug my Iceco fridge in the cabin household plug to charge my ecoflow 1200mah battery it clicks on and off while charging and not even sure it is charging. This happens during driving and not and when I am running the fridge on it.....any ideas?

AT4 2.webp
AT4 3.webp
AT4 1.webp
 

Great thread, I will post pics of mine here as it gets built.

Planning on a Nutzo Tech2 bed rack (expensive but worth it) coupled with a Skycamp 3.0 - I just wish they still made them in white.
 

Do you have a Carbon Pro bed by chance? I'm trying to do the same but have no luck finding a way to attach a cap or camper to this bed.
So just bought a slightly used 2021 1500 AT4 w/ the carbon pro package. I always have a canopy on my truck. It was never disclosed to me and I never thought to ask about mounting a canopy to my bed. Because you can mount a canopy to every bed on the market. However the carbon beds are slanted and there is no flat surface to put the C clamps to secure the canopy. I have called a LEER/ snugtop installer and they called their reps and they have no "approved" fix for this. I have also called an ARE dealer who called their rep and they have no "approved" fix. Then I called SmartCap they sent me pictures of a customer that had cut holes for the clamps to fit through but stated this was the customers doing and not an approved method. I am now contacting dealerships to figure out what GMCs fix is. I can not imagine that they built the only bed in the world that you can not attach a canopy to.

Does anyone have any insight into this issue or any approved fix?
 

I've had great luck with the softopper/tent extension that they sell on the softtopper website.

Put a pre-order in for the Lone Peak Pop Up Wedge Tent, should be ready in a couple months and I'll update with that set up.
 

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