2023 GMC Sierra 3500 4×4 :: Classifieds

GMC 3500 Sierra

GMC clearly has its sights on overlanding and has released a series of uprated models designed for adventure travel. The team at Expedition Portal has been very impressed with their rugged AT4/AT4X lineup, including the midsize Canyon and, of course, the full-size Sierra. In fact, we chose the Sierra 1500 AT4 as an Overland Journal project vehicle, which was documented on the Expedition Portal YouTube channel. It’s a great platform for overlanding as further demonstrated by expedition-ready builds on our forum, including this 2017 SLT, a 2022 AT4 with an Alu-Cab Alu-Cabin, and a 2014 with an OVRLND camper. Today is a unique opportunity to purchase an almost new (15,000 miles) 2023 GMC Sierra 3500 with the 6.6-liter Duramax motor and a plethora of premium upgrades for a great price. This is not an AT4 but in many ways, it’s better because it already has comparable aftermarket upgrades. Thanks to the money you’ll save on an AT4 (starting at $70,300) you’ll even be able to add front and rear lockers for less.

GMC Sierra 3500 suspension

From the Seller:

This truck is very dialed in and set up to drive better than a 2500 empty, but still retain all its payload and towing capacity when needed. It’s hard to stress how much better riding the truck is now—go test drive a stock 3500 if you haven’t experienced the teeth chatter. Title in hand. Fly into Phoenix (PHX) or Mesa (AZA) and drive it home.”

GMC full-size truck bed cover

2023 GMC Sierra 3500 4×4

The 3500 is fitted with a 6.6-liter Duramax diesel that produces 445 horsepower and a considerable 910 pound-feet of torque. A powerful motor is matched with excellent capability thanks to 4WD, low range, a limited-slip differential, all-terrain tires, and more. These go-anywhere credentials are mated with impressive commercial specs such as a 4,298-pound payload and a 20,000-pound towing capacity. Inside, the GMC showcases a well-equipped interior with driver comforts that include:

  • Infotainment system with navigation, 7-inch
  • Air-conditioning
  • Cruise control
  • 3M ceramic heat-rejecting window tint
  • Rearview camera

GMC Sierra 3500 dash

Distinguishing Features

  • Fox shocks, Deaver progressive rear leaf springs, and airbags
  • Method wheels with Falken ATW tires
  • ARB twin air compressor
  • Baja Designs dual fog kit
  • Bakflip X4s tonneau cover
  • Amp powered steps
  • B&W gooseneck hidden hitch

A 3500 rear end

This 2023 GMC 3500 4×4 is listed for $63,000 and is currently located in Arizona. Check the full vehicle specifications via the original Expedition Portal forum post here.

Overland ready GMC Sierra 3500 power steps

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No money in the bank, but gas in the tank. Our resident Bikepacking Editor Jack Mac is an exploration photographer and writer living full-time in his 1986 Vanagon Syncro but spends most days at the garage pondering why he didn’t buy a Land Cruiser Troopy. If he’s not watching the Lord of the Rings Trilogy, he can be found mountaineering for Berghaus, sea kayaking for Prijon, or bikepacking for Surly Bikes. Jack most recently spent two years on various assignments in the Arctic Circle but is now back in the UK preparing for his upcoming expeditions—looking at Land Cruisers. Find him on his website, Instagram, or on Facebook under Bicycle Touring Apocalypse.