For sale is my 2025 GMC Sierra 3500HD AT4, powered by the gasoline engine paired with the Allison transmission. This truck is in excellent condition, has been well cared for, and is ready for work or daily driving.

The AT4 package delivers a perfect blend of capability and comfort, with an aggressive stance, off-road suspension, and premium interior finishes. The Allison transmission provides smooth, confident shifting and proven durability, whether towing, hauling, or cruising.

Highlights include:

• 2025 GMC Sierra 3500HD AT4

• Gasoline engine with Allison transmission

• AT4 off-road package

• Heavy-duty towing and payload capability

• Clean, well-maintained interior

• Strong, smooth drivetrain

• No mechanical issues

• Adult owned and responsibly driven

This truck has been well maintained, never abused, and needs nothing. It’s an excellent option if you want a heavy-duty truck without the complexity of diesel, while still having serious capability.

Serious inquiries only