Camper Wiring Harness; Trailer Wiring Harness - GMC SIERRA 1994 Manual

If equipment such as a cap or camper is installed, a wire labeled "Center
High Mount Stop lamp (CHMSL) feed" is provided along the left rear frame
rail. This wire should be used to connect a CHMSL on the cap or camper.
Camper Wiring Harness (Option)
An optional 5-wire
harness is stored in the
front stake pocket on
the driver's side of the
bed. The harness has
no connector, and
should be wired by a
qualified electrical
technician.
It must be routed out of your vehicle and securely attached so that it won't
be pulled or rubbed while you're using it.
Store the harness in its original position. Wrap the harness together and tie it
neatly so it won't be damaged.
Trailer Wiring Harness (Option)
An optional 7-wire
harness is stored under
your vehicle along the
rear frame
crossmember. The
harness has a 30 amp.
in-line fused battery
feed wire and no
connector, and should
be wired by a
qualified electrical
technician.
Securely 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 won't
bind or break when turning with the trailer, but not so loose that it drags on
the ground.
Store the harness in its original position. Wrap the harness together and tie it
neatly so it won't be damaged.
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