GMC 1995 Jimmy Owner's Manual page 133

Don't exceed the maximum vehicle capacity when loading your vehicle.
For
more information on vehicle capacity and loading, see "Loading Your
Vehicle" in the Index.
To prevent damage or loss of cargo as you're driving, check now and then to
make sure the luggage carrier and cargo are still securely fastened.
Trailer Wiring Harness
Your vehicle will have a 5-wire and may have a 7-wire harness.
The light duty trailer wiring is a 5-wire harness assembly taped and bundled
at the left corner of the vehicle. The harness has no connector, and you
should have a qualified service person wire your harness for you.
The heavy duty trailer wiring is a 7-wire harness assembly. It is stored
under the vehicle, along the passenger-side frame crossmember on
two-door vehicles and on the driver-side corner frame crossmember on
four-door vehicles. It has a 30-amp feed wire with an inline fuse located by
the junction block. See "Fuses and Circuit Breakers" in the Index.
Both the 5-wire harness and the 7-wire harness have no connector and
should be wired by a qualified service person. Attach the harness to the
trailer, then tape or strap it to your vehicle's frame rail. Be sure you leave it
loose enough so the wiring doesn't bend or break, but not so loose that it
drags on the ground.
Store the harness in its original place. Wrap the harness together and tie it
neatly so it won't be damaged.
2-81