CURT INSTALLATION MANUAL

Weight Carrying Capacity

Gross trailer weight (GTW): 3,500 lbs.

Tongue weight (TW): 350 lbs.

Parts List

Tools Required

• Ratchet
• Flathead screwdriver
• Torque wrench
• Exhaust isolator removal tool
• Socket, 19mm

* For a tools reference guide visit curtmfg.com/trailer-hitch-installation

Notice

Visit www.curtmfg.com for a full-color copy of this instruction manual, as well as helpful videos, guides and much more!

Before you begin installation, read all instructions thoroughly.

Proper tools will improve the quality of installation and reduce the time required.

This installation requires:

• Temporarily lower exhaust
• No drilling required
• No trimming required

Periodic inspection of the trailer hitch should be performed to ensure all mounting hardware remains tight and structural components are secure.

To help prevent damage to the product or vehicle, refer to the specified torque specifications when securing hardware during the installation process.

Safety Instructions

Safety glasses should be worn at all times while installing this product. ?

Product Registration and Warranty

CURT stands behind our products with industry-leading warranties. To get copies of the product warranties, register your purchase or provide feedback, visit: warranty.curtgroup.com/surveys

ASSEMBLY

Parts List

Diagram: Assembly illustration showing the CURT 13579 trailer hitch attachment to a vehicle's driver-side and passenger-side frame rails, showing bolt and washer placement. Arrows indicate FRONT and REAR.

Diagram: Conical Toothed Washer Orientation. Shows correct placement of a conical-toothed washer between the vehicle frame and hitch side plate, secured by a hex bolt.

Diagram: Weldnut Cleaning. Guide for cleaning frame weldnuts using lubricant, compressed air, or a wire brush to remove debris before bolt insertion.

Installation Steps

Step 1: Remove Frame Plugs

Remove the four plastic plugs from the side of the frame rails, two on each side. ?️

Images: Show the removal of four plastic plugs from the vehicle's frame rails.

Step 2: Lower Exhaust (If Necessary)

Note: Some models may require temporarily lowering of the exhaust. To lower the exhaust, unhook the three rearmost exhaust hangers. Support the exhaust prior to prevent damage or injury. ⚙️

Images: Depict the process of temporarily lowering the vehicle's exhaust system by unhooking the rearmost hangers and supporting it.

Step 3: Position and Install Hitch

Raise the hitch into position and install the four hex bolts (#1) and four conical-toothed washers (#2). ✔️

Images: Show the installation of four hex bolts and four conical-toothed washers into the frame.

Step 4: Torque Fasteners

Torque all M12 fasteners to 86 ft-lbs. ?

Image: Shows a torque wrench tightening an M12 fastener to 86 ft-lbs.

Step 5: Reinstall Exhaust

Raise the exhaust back into position and reinstall the isolators if lowered in step 2. ⬆️

Final Installed View

Images: Rear views of a vehicle with the CURT 13579 trailer hitch installed.

Towing Basics & Safety Information

For information on safely towing your trailer, visit curtmfg.com/understanding-towing.