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:

• 118392

Wiring Access Location:

• Rear taillight wiring harness behind the interior trim panels near the doors.

Tools Required:

• Drill with a 3/32" drill bit.
• Philips head screwdriver.

Step-by-Step Instructions:

1. Access the Taillight Wiring Harness:

   • Remove the rear interior trim panels located near the doors to expose the vehicle’s taillight wiring harness.
   • The harness will have a connection point on both sides matching the T-Connector adapter.

2. Driver’s Side Connection:

   • Disconnect the vehicle’s wiring harness connectors on the driver’s side, being careful not to damage the locking tabs.
   • Plug the T-Connector end with the yellow wire between the mating plugs on the driver’s side taillight socket and the vehicle’s wiring harness. Ensure the connectors are fully inserted and locked using the existing and provided locking tabs.

3. Ground Connection:

   • Locate a suitable grounding point near the connector, such as the vehicle’s frame or cross member.
   • Caution: Do not drill into the vehicle floor or any exposed surfaces. Verify what is behind any surface prior to drilling to avoid damage or injury.
   • Clean the area of dirt and rustproofing, drill a 3/32" hole, and secure the white wire using the provided eyelet and screw.

4. Passenger’s Side Connection:

   • Repeat steps 2 and 3 on the passenger’s side using the T-Connector end with the green wire.

5. Securing the Harness:

   • Tuck the green wire under the floor trim (threshold) panel and secure the wiring with cable ties as needed.

6. Reassembly:

   • Replace all removed trim panels and secure the rear interior of the vehicle.

7. Testing the Installation:

   • Test the installation with a test light or trailer to verify proper functionality. All connections must be complete for the T-Connector to function correctly.

   Specifications:

   • Max. stop/turn light: 1 per side (7.5 amps).
   • Max. tail lights: (7.5 amps).

Hardware List:

• T-Connector adapter.
• Eyelet and screw.
• Cable ties.

Safety Notes:

• Overloading the circuit can cause fires. Do not exceed the towing manufacturer’s rating or the unit specifications.
• Test the installation thoroughly after completing all connections.

Manufacturer Notes:

• Follow all warnings and installation instructions provided.
• Use a test light or trailer to confirm proper installation.
• Refer to the vehicle owner’s manual for additional information.

Installation Instructions for T-Connector Adapter

Part Numbers:

• 118392

Wiring Access Location:

• Rear taillight wiring harness behind the interior trim panels near the doors.

Tools Required:

• Drill with a 3/32" drill bit
• Philips head screwdriver

Step-by-Step Instructions:

1. Access the Taillight Wiring Harness:

   • Remove the rear interior trim panels located near the doors to expose the vehicle’s taillight wiring harness.
   • The harness will have a connection point on both sides matching the T-Connector adapter.

2. Driver’s Side Connection:

   • Disconnect the vehicle’s wiring harness connectors on the driver’s side, being careful not to damage the locking tabs.
   • Plug the T-Connector end with the yellow wire between the mating plugs on the driver’s side taillight socket and the vehicle’s wiring harness.
   • Ensure the connectors are fully inserted and locked using the existing and provided locking tabs.

3. Ground Connection:

   • Locate a suitable grounding point near the connector, such as the vehicle’s frame or cross member.
   • Caution: Do not drill into the vehicle floor or any exposed surfaces. Verify what is behind any surface prior to drilling to avoid damage or injury.
   • Clean the area of dirt and rustproofing, drill a 3/32" hole, and secure the white wire using the provided eyelet and screw.

4. Passenger’s Side Connection:

   • Repeat steps 2 and 3 on the passenger’s side using the T-Connector end with the green wire.

5. Securing the Harness:

   • Tuck the green wire under the floor trim (threshold) panel and secure the wiring with cable ties as needed.

6. Reassembly:

   • Replace all removed trim panels and secure the rear interior of the vehicle.

7. Testing the Installation:

   • Test the installation with a test light or trailer to verify proper functionality.
   • All connections must be complete for the T-Connector to function correctly.

Specifications:

• Max Stop/Turn Light: 7.5 amps per side
• Max Tail Lights: 7.5 amps

Hardware List:

• T-Connector adapter
• Eyelet and screw
• Cable ties

Safety Notes:

• Overloading the circuit can cause fires. Do not exceed the towing manufacturer’s rating or the unit specifications.
• Test the installation thoroughly after completing all connections.

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.