The Chevy Trail Boss and GMC AT4 both have a factory 2in lift compared to other GM 1500 trucks of the same year model. Fabtech's suspension system for these two trucks provide a 4in lift height on top of the factory 2in lift for clearance of 35in tall tires. Once a Trail Boss or AT4 is lifted with a Fabtech 4in system, the truck will sit at the same height as a 1500 with a 6in suspension and 35in tires. The near stock track width keeps the tires under the fenders for a clean appearance. Fabtech's proprietary steering knuckle geometry provides excellent lock to lock turning radius to maneuver in tight spots. Heavy duty 1/4in thick steel crossmembers feature OE style alignment cam pins that utilize the factory cams for easy adjustment. Triple front diff mounts reposition the differential for vibration free operation at high speed. The stainless steel Dirt Logic 2.5 Coilovers replace the Trail Boss or AT4 coilover with an outstanding ride quality both on and offroad. They are designed for aggressive offroad use yet have a supple on road feel. Rear Dirt Logic 2.25 shocks aid in damping the vehicle for a balanced ride. Rear lift is accomplished by removing the factory 2in block and replacing it with a 5in block and u-bolt system. Fabtech has addressed all aspects of the Trail Boss suspension for full suspension travel with lock to lock steering without over cycling. Comes with a free 5 year 60,000 mile Powertrain Warranty.
This Part Fits:
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 2019 | Chevrolet | Silverado 1500 | LT Trail Boss | |
| 2020 | Chevrolet | Silverado 1500 | LT Trail Boss | |
| 2021 | Chevrolet | Silverado 1500 | LT Trail Boss | |
| 2019 | GMC | Sierra 1500 | AT4 | |
| 2020 | GMC | Sierra 1500 | AT4 | |
| 2021 | GMC | Sierra 1500 | AT4 |
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Shipping Policy
Order Processing
- Most in-stock orders are processed within 1-2 business days.
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- Custom, made-to-order, or special-order items may require additional processing time. If extended lead times apply, we will notify you as soon as possible.
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We ship throughout the continental United States using trusted carriers such as UPS, FedEx, USPS, and LTL freight carriers for oversized items.
Shipping options and estimated delivery times are displayed during checkout.
Free Shipping
Free shipping may be offered on qualifying products or orders. Free shipping applies only to eligible locations within the contiguous United States and excludes oversized freight shipments unless otherwise noted.
Freight Shipments
Large items such as bumpers, some lift kits, and other oversized products may require freight delivery.
Customers are responsible for:
- Providing an accessible delivery location.
- Inspecting the shipment before signing for delivery.
- Noting any visible damage on the carrier's delivery receipt.
- Reporting concealed damage within 48 hours of delivery.
Failure to note shipping damage at delivery may affect the ability to file a freight claim.
Delivery Delays
While we make every effort to ensure timely delivery, shipping dates are estimates and may be affected by weather, carrier delays, manufacturer availability, or other circumstances beyond our control.
Return Policy
We want you to be completely satisfied with your purchase.
Standard Returns
Most new, unused products may be returned within 30 days of delivery.
Returned merchandise must:
- Be unused and uninstalled.
- Be in its original packaging.
- Include all hardware, instructions, and accessories.
- Be in resalable condition.
Return Authorization
A return Merchandise Authorization (RMA) is required before returning any item.
Returns sent without prior authorization may be refused.
Non-Returnable Items
The following items are generally non-returnable unless defective or shipped in error:
- Custom or made-to-order products
- Painted or color-matched items
- Special-order products
- Electronics that have been installed or activated
- Spray-in bedliners or installed services
- Clearance, closeout, or final sale items
- Gift cards
Return Shipping
Unless the return is due to our error or a manufacturer's defect, customers are responsible for return shipping costs.
Original shipping charges are non-refundable.
Restocking Fees
Certain manufacturers may charge a restocking fee, typically between 10% and 25%, depending on the product and supplier. Any applicable restocking fee will be deducted from your refund.
Damaged or Incorrect Orders
If your order arrives damaged or you receive the wrong item:
- Contact us within 48 hours of delivery.
- Save all packaging materials.
- Provide photos of the product, packaging, and shipping label.
We will work quickly to replace the item or resolve the issue.
Defective Products
Products covered by a manufacturer's warranty may be repaired or replaced according to the manufacturer's warranty policy.
Our team will gladly assist you with the warranty process whenever possible.
Refunds
Once your return is received and inspected, refunds will be issued to the original payment method.
Please allow 5-10 business days for the refund to appear on your account, depending on your financial institution.
Order Cancellations
Orders may be canceled prior to shipment.
Once an order has shipped, it cannot be canceled and must follow the standard return process.
Custom or special-order products may not be canceled once production has begun.
Installation Recommendation
Many truck accessories require professional installation.
We recommend having products installed by a qualified installer. Damage resulting from improper installation is not covered under our return policy. Please contact one of our store locations for professional installation.
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