Installation Instructions for GM Full Size Van

Part Numbers:

• 75189
• 87189
• 44028

Wiring Access Location:

• SUV3, SUV4

Tools Required:

• Wrenches: 3/4", 7/8" (tighten all fasteners with torque wrench)

Drill Bits:

• None

Notes:

• Hitch requires 5/8" pin and clip if stabilizing pin is not installed.

Step-by-Step Instructions:

1. Insert carriage bolts and blocks through existing access slots and into attachment holes as shown in the diagram for each side.
2. Raise the hitch into position and fasten with conical toothed washers and nuts as shown in the diagram for each side.
3. Tighten all 1/2” GR5 fasteners to 75 lb-ft (102 N·m).

Hardware List:

• (4) 1/2-13 x 1-3/4 GR5 Carriage Bolts
• (2) 1/4 x 1-1/2 x 3 Blocks (1711)
• (2) 1/4 x 1-1/2 x 2 Blocks (1540)
• (4) Conical Toothed Washers
• (4) Nuts

Safety Notes:

• Check the hitch frequently to ensure all fasteners and the ball are properly tightened.
• If the hitch is removed, plug all holes in the trunk pan or other body panels to prevent water and exhaust fumes from entering.
• Replace any damaged hitch or ball immediately.
• Follow safety precautions when working beneath the vehicle, and wear eye protection.
• Do not cut access or attachment holes with a torch.

Specifications:

• Hitch Type and Weight Ratings:
  • Weight Distributing: Max Trailer Weight 7,500 lbs, Max Tongue Weight 750 lbs.
  • Weight Carrying (Ball Mount): Max Trailer Weight 5,000 lbs, Max Tongue Weight 500 lbs.
• Complies with safety specifications and requirements for connecting devices and towing systems of the State of New York, V.E.S.C. Regulation V-5, and SAE J684.

Installation Instructions for GM Full Size Van

Part Numbers:

• 75189
• 87189
• 44028

Wiring Access Location:

• SUV3, SUV4

Tools Required:

• Wrenches: 3/4", 7/8" (tighten all fasteners with torque wrench)

Drill Bits:

• None

Notes:

• Hitch requires 5/8" pin and clip if stabilizing pin is not installed.

Step-by-Step Instructions:

1. Insert carriage bolts and blocks through existing access slots and into attachment holes as shown in the diagram for each side.
2. Raise the hitch into position and fasten with conical toothed washers and nuts as shown in the diagram for each side.
3. Tighten all 1/2” GR5 fasteners to 75 lb-ft (102 N·m).

Hardware List:

• (4) 1/2-13 x 1-3/4 GR5 Carriage Bolts
• (2) 1/4 x 1-1/2 x 3 Blocks (1711)
• (2) 1/4 x 1-1/2 x 2 Blocks (1540)
• (4) Conical Toothed Washers
• (4) Nuts

Safety Notes:

• Check the hitch frequently to ensure all fasteners and the ball are properly tightened.
• If the hitch is removed, plug all holes in the trunk pan or other body panels to prevent water and exhaust fumes from entering.
• Replace any damaged hitch or ball immediately.
• Follow safety precautions when working beneath the vehicle, and wear eye protection.
• Do not cut access or attachment holes with a torch.

Specifications:

• Hitch Type and Weight Ratings:
  • Weight Distributing: Max Trailer Weight 7,500 lbs, Max Tongue Weight 750 lbs.
  • Weight Carrying (Ball Mount): Max Trailer Weight 5,000 lbs, Max Tongue Weight 500 lbs.
• Complies with safety specifications and requirements for connecting devices and towing systems of the State of New York, V.E.S.C. Regulation V-5, and SAE J684.

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:

• 118377

Wiring Access Location:

• Near the rear interior trim panels close to the doors.

Tools Required:

• Screw or cable ties (provided).

Step-by-Step Instructions:

1. Remove the rear interior trim panels near the doors.

   • Locate the vehicle’s tail light wiring harness. Connection points will be present on both sides of the vehicle, matching the ends of the T-Connector adapter.

2. Disconnect the vehicle’s wiring harness connectors on the driver’s side.

   • Caution: Be careful not to damage the locking tabs.

3. Position the black box on the left (driver’s) side of the vehicle.

   • Plug the T-Connector harness containing the yellow wire into the left vehicle wiring harness connector.
   • Ensure the connectors are fully inserted and secured using the existing and provided locking tabs.

4. Repeat the procedure for the passenger side using the connector containing the green wire.

5. Route the green wire under the floor trim (threshold) panel.

   • Secure the black box to the vehicle using the provided screw or cable tie behind the driver’s side trim panel.

6. Reinstall the rear trim panels removed in step 1.

7. 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.
• Black box.
• Cable ties or screws.

Safety Notes:

• On some early production vehicles, the tail light and stoplight circuits may be reversed. If this condition is present, wires can be switched according to the included diagram or by consulting a dealer.
• 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:

• 118377

Wiring Access Location:

• Near the rear interior trim panels close to the doors.

Tools Required:

• Screw or cable ties (provided)

Step-by-Step Instructions:

1. Remove Rear Interior Trim Panels:

   • Remove the rear interior trim panels near the doors to access the vehicle’s tail light wiring harness.
   • Connection points will be present on both sides of the vehicle, matching the ends of the T-Connector adapter.

2. Disconnect the Vehicle’s Wiring Harness:

   • Disconnect the wiring harness connectors on the driver’s side.
   • Caution: Avoid damaging the locking tabs during disconnection.

3. Position the Black Box:

   • Place the black box on the left (driver’s) side of the vehicle.
   • Plug the T-Connector harness containing the yellow wire into the left vehicle wiring harness connector.
   • Ensure the connectors are fully inserted and secured with the locking tabs.

4. Connect the Passenger Side:

   • Repeat the procedure for the passenger side using the connector containing the green wire.

5. Route the Green Wire:

   • Route the green wire under the floor trim (threshold) panel to the passenger side.
   • Secure the black box to the vehicle using the provided screw or cable tie behind the driver’s side trim panel.

6. Reinstall Trim Panels:

   • Reinstall the rear trim panels removed in step 1.

7. Test the Installation:

   • Use a test light or connect a trailer to verify the following functions:
     • Left Turn Signal
     • Right Turn Signal
     • Brake Lights
     • Running Lights

Specifications:

• Max Current: 7.5 amps per circuit

Hardware List:

• T-Connector adapter
• Black box
• Cable ties or screws

Safety Notes:

• On some early production vehicles, the tail light and stoplight circuits may be reversed. If this occurs, consult the included diagram or seek assistance from a qualified technician.
• Ensure all connections are clean and securely fastened.
• Test the installation thoroughly after completing all steps.

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.