GMC SIERRA 2002 Manual page 284

Add-On Equipment
When you carry removable items, you may need to put a
limit on how many people you carry inside your vehicle.
Be sure to weigh your vehicle before you buy and install
the new equipment.
NOTICE:
Your warranty doesn't cover parts or
components that fail because of overloading.
Remember not to exceed the Gross Axle Weight Rating
(GAWR) of the front or rear axle. See "Loading Your
Vehicle" in the Index.
*Equipment
Ladder Rack and Cargo
Cross Toolbox and Cargo
Side Boxes
and Cargo . . . . . 250 lbs. per side (113 kg per side)
* The combined weight for all rail
should not exceed 1,000 lbs. (454 kg). A reinforcement
- -
kit for rail mounted add on equipment is recommended.
See your dealer.
Maximum Weight
. . . . . . . . . . 750 lbs. (340 kg)
. . . . . . . . . 400 lbs. (181 kg)
-
mounted equipment
Adding a Snow Plow or
Similar Equipment
Before installing a snow plow on your vehicle, here are
some things you'll need to know:
NOTICE:
If your vehicle doesn't have the snow plow prep
package, adding a plow can damage your vehicle,
and the repairs wouldn't be covered by warranty.
Unless your vehicle was built to carry a snow
plow, don't add one to your vehicle.
If your vehicle has the snow plow option called
RPO VYU (snow plow prep package), then the
payload your vehicle can carry will be reduced
when a snow plow is installed. Your vehicle can
be damaged if either the front or rear axle
ratings, or the GVW, are exceeded.
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