Installation Instructions for GMC & Chevrolet 2500HD/3500/3500HD Sierra & Silverado Trucks

Part Numbers:

• 41944
• 96944

Wiring Access Location:

• PU3

Tools Required:

• Wrenches: 13/16", 7/8", 18mm, 21mm, 22mm
• Drill Bits: None

Step-by-Step Instructions:

1. Remove Existing Bolts:

   • Remove M14 bolts from the bottom of each truck frame rail’s bumper bracket.
   • Return these bolts to the vehicle owner.

2. Position Hitch:

   • Lift the hitch into position, aligning the rearmost slots on the hitch under the existing weldnuts in the truck frame.

3. Install Rear M14 Bolts:

   • Install the new M14 bolts through lock washers, blocks, and the hitch into the weldnuts in the truck frame.

4. Remove Side Nuts and Bolt Plates:

   • Remove M12 nuts and bolt plates from the sides of the frame.
   • Retain these for reinstallation later.

5. Adjust Bumper Brace (2001–2007 Models):

   • Loosen the nuts at the bumper end of the bumper brace, allowing it to swing away.

6. Install Attachment Bars:

   • Place attachment bars as shown in the instructions and loosely bolt them to the hitch.
   • For 2001–2007 models, swing the brace back and secure it as shown.

7. Install Remaining Fasteners:

   • Install remaining fasteners through the existing large holes in the truck frame as shown.
   • Use thinner blocks (1/4" x 3") under the hitch and orient the holes in the blocks to ensure they lay flat against the hitch when tightened.

8. Tighten Fasteners:

   • Torque all M14 x 1.5 (fine-thread) fasteners to 148 lb-ft (201 N*m).
   • Torque all M12 fasteners to 92 lb-ft (125 N*m).
   • Torque all M14 x 2.0 (course-thread) fasteners to 148 lb-ft (201 N*m).

Torque Specifications:

• M14 x 1.5 (fine-thread): 148 lb-ft (201 N*m)
• M14 x 2.0 (course-thread): 148 lb-ft (201 N*m)
• M12 fasteners: 92 lb-ft (125 N*m)

Hardware List:

• (2) Hex Bolts, M14 x 1.5 x 45mm CL10.9
• (2) Hex Bolts, M14 x 2.0 x 60mm CL10.9
• (6) Hex Bolts, M12 x 1.75 x 45mm CL10.9
• (2) Spacer Blocks, 3/8" x 1-1/2" x 3"
• (2) Spacer Blocks, 1/4" x 1-1/2" x 3" (offset hole)
• (2) Spacer Blocks, 3/8" x 1-1/2" x 2"
• (10) Conical Washers, 1/2"
• (2) Lock Washers, 1/2"
• (2) Lock Washers, 9/16"
• (6) Nuts, M12 x 1.75 CL10
• (2) Nuts, M14 x 1.5 CL10.9
• (2) Nuts, M14 x 2.0 CL8

Safety Notes:

• Frequently check the hitch to ensure all fasteners and the ball are securely tightened.
• If the hitch is removed, plug all holes in the vehicle's frame to prevent water or exhaust fumes from entering.
• Replace any damaged hitch or ball immediately.
• Always wear eye protection and observe safety precautions when working beneath a vehicle.
• Do not cut access or attachment holes with a torch.

Specifications:

• Weight Carrying (Ball Mount):
  • Max Gross Trailer Weight: 13,000 lb (5,902 kg)
  • Max Tongue Weight: 1,950 lb (886 kg)
• Weight Distributing:
  • Max Gross Trailer Weight: 16,000 lb (7,264 kg)
  • Max Tongue Weight: 1,600 lb (726 kg)

Additional Notes:

• Complies with V.E.S.C. Regulation V-5 and SAE J684 safety standards.
• Ensure proper alignment and torque specifications are followed to maintain safety and performance.

Installation Instructions for Pickup Trucks (2500HD/3500/3500HD Models)

Part Numbers:

• 41944
• 96944

Wiring Access Location:

• PU3

Tools Required:

• Wrenches: 13/16", 7/8", 18mm, 21mm, 22mm
• Drill Bits: None

Step-by-Step Instructions:

1. Remove Existing Bolts:

   • Remove M14 bolts from the bottom of each truck frame rail’s bumper bracket.
   • Return these bolts to the vehicle owner.

2. Position Hitch:

   • Lift the hitch into position, aligning the rearmost slots on the hitch under the existing weldnuts in the truck frame.

3. Install Rear M14 Bolts:

   • Install the new M14 bolts through lock washers, blocks, and the hitch into the weldnuts in the truck frame.

4. Remove Side Nuts and Bolt Plates:

   • Remove M12 nuts and bolt plates from the sides of the frame.
   • Retain these for reinstallation later.

5. Adjust Bumper Brace (2001–2007 Models):

   • Loosen the nuts at the bumper end of the bumper brace, allowing it to swing away.

6. Install Attachment Bars:

   • Place attachment bars as shown in the instructions and loosely bolt them to the hitch.
   • For 2001–2007 models, swing the brace back and secure it as shown.

7. Install Remaining Fasteners:

   • Install remaining fasteners through the existing large holes in the truck frame as shown.
   • Use thinner blocks (1/4" x 3") under the hitch and orient the holes in the blocks to ensure they lay flat against the hitch when tightened.

8. Tighten Fasteners:

   • Torque all M14 x 1.5 (fine-thread) fasteners to 148 lb-ft (201 N*m).
   • Torque all M12 fasteners to 92 lb-ft (125 N*m).
   • Torque all M14 x 2.0 (course-thread) fasteners to 148 lb-ft (201 N*m).

Torque Specifications:

• M14 x 1.5 (fine-thread): 148 lb-ft (201 N*m)
• M14 x 2.0 (course-thread): 148 lb-ft (201 N*m)
• M12 fasteners: 92 lb-ft (125 N*m)

Hardware List:

• (2) Hex Bolts, M14 x 1.5 x 45mm CL10.9
• (2) Hex Bolts, M14 x 2.0 x 60mm CL10.9
• (6) Hex Bolts, M12 x 1.75 x 45mm CL10.9
• (2) Spacer Blocks, 3/8" x 1-1/2" x 3"
• (2) Spacer Blocks, 1/4" x 1-1/2" x 3" (offset hole)
• (2) Spacer Blocks, 3/8" x 1-1/2" x 2"
• (10) Conical Washers, 1/2"
• (2) Lock Washers, 1/2"
• (2) Lock Washers, 9/16"
• (6) Nuts, M12 x 1.75 CL10
• (2) Nuts, M14 x 1.5 CL10.9
• (2) Nuts, M14 x 2.0 CL8

Safety Notes:

• Frequently check the hitch to ensure all fasteners and the ball are securely tightened.
• If the hitch is removed, plug all holes in the vehicle's frame to prevent water or exhaust fumes from entering.
• Replace any damaged hitch or ball immediately.
• Always wear eye protection and observe safety precautions when working beneath a vehicle.
• Do not cut access or attachment holes with a torch.

Specifications:

• Weight Carrying (Ball Mount):
  • Max Gross Trailer Weight: 13,000 lb (5,902 kg)
  • Max Tongue Weight: 1,950 lb (886 kg)
• Weight Distributing:
  • Max Gross Trailer Weight: 16,000 lb (7,264 kg)
  • Max Tongue Weight: 1,600 lb (726 kg)

Additional Notes:

• This product complies with V.E.S.C. Regulation V-5 and SAE J684 safety standards.
• Ensure proper alignment and torque specifications are followed to maintain safety and performance.

Attention:

This is a summary of the installation procedure. For complete installation instructions, including diagrams and detailed information from the manufacturer, please download the full installation PDF.

Warranty Information:

For complete warranty instructions, please download the full installation PDF.

Technical Support:

For technical support and assistance, our team of experts is available to help. You can reach our tech support by visiting www.trailerjacks.com or calling 877-869-6690.

Installation Instructions for T-Connector Adapter

Part Numbers:

• 118384

Wiring Access Location:

For Vehicles Without a Factory 7-Way:

• Behind the bumper on the driver’s side of the vehicle.

For Vehicles With a Factory 7-Way:

• Attached to the hitch on the driver’s side of the vehicle.

Tools Required:

• None specified.

Step-by-Step Instructions:

For Vehicles Without a Factory 7-Way:

1. Locate the tow vehicle’s trailer harness connector (A).

   • This is located under the vehicle, behind the bumper, on the driver’s side.

2. Remove the protective cap (C) from connector (A).

   • Save the cap for later use.
   • Ensure the mating surfaces of the connectors are clean. Clean if necessary.

3. Connect the T-Connector adapter end (B) to the vehicle’s connector (A).

   • Ensure the T-Connector is fully inserted with locking tabs in place.

4. Place the protective cap (C) on the remaining plug end.

For Vehicles With a Factory 7-Way:

5. Locate the Factory 7-Way attached to the hitch on the driver’s side.

6. Separate the factory socket (A) and the 7-Way (C).

7. Plug the T-Connector adapter (B) between the factory socket and the 7-Way.

Final Steps for All Vehicles:

8. Test the installation with a test light or trailer.

   • Specifications:
     • This unit is rated for 7.5 amps per circuit.

Hardware List:

• T-Connector adapter.
• Protective cap.

Safety Notes:

• Handle all connectors with care to avoid damage.
• Ensure all connections are clean and securely fastened.
• Test the installation after completing all steps to verify functionality.

Manufacturer Notes:

• Follow all warnings and instructions provided with the product.
• Use a test light or trailer to confirm proper installation.

Installation Instructions for T-Connector Adapter

Part Numbers:

• 118384

Wiring Access Location:

For Vehicles Without a Factory 7-Way:

• Behind the bumper on the driver’s side of the vehicle.

For Vehicles With a Factory 7-Way:

• Attached to the hitch on the driver’s side of the vehicle.

Tools Required:

• None specified.

Step-by-Step Instructions:

For Vehicles Without a Factory 7-Way:

1. Locate the Trailer Harness Connector:

   • Find the vehicle’s trailer harness connector (A) under the vehicle, behind the bumper, on the driver’s side.

2. Remove Protective Cap:

   • Remove the protective cap (C) from connector (A).
   • Save the cap for later use.
   • Ensure all mating surfaces of the connectors are clean. Clean if necessary.

3. Connect the T-Connector:

   • Attach the T-Connector adapter end (B) to the vehicle’s connector (A).
   • Make sure the T-Connector is fully inserted with locking tabs secured.

4. Replace the Protective Cap:

   • Place the protective cap (C) on the remaining plug end.

For Vehicles With a Factory 7-Way:

5. Locate the Factory 7-Way:

   • The Factory 7-Way is attached to the hitch on the driver’s side.

6. Separate the Factory Socket and 7-Way:

   • Disconnect the factory socket (A) from the 7-Way (C).

7. Install the T-Connector:

   • Plug the T-Connector adapter (B) between the factory socket and the 7-Way.

Final Steps for All Vehicles:

8. Test the Installation:
   • Use a test light or trailer to verify the functionality of the installed T-Connector.

Specifications:

• Maximum Current Rating: 7.5 amps per circuit

Hardware List:

• T-Connector adapter
• Protective cap

Safety Notes:

• Handle all connectors with care to avoid damage.
• Ensure all connections are clean and securely fastened.
• Test the installation after completing all steps to verify functionality.

Additional Notes:

• Attention: This is a summary of the installation procedure. For complete installation instructions, including diagrams and detailed information from the manufacturer, please download the full installation PDF.
• Technical Support: For technical support and assistance, our team of experts is available to help. You can reach our tech support by visiting www.trailerjacks.com or calling 877-869-6690.