Owners manual

GM ’99 Silverado, Sierra (not Sierra Classic) models, GM ’00 to ’10 Silverado,
Sierra models including HD models
CAUTION!
Read pages 2-3 of these instructions before starting installation. Failure to do so could result in significant vehicle damage!
IMPORTANT NOTES FOR THIS INSTALLATION:
1. Find parallel rows of bed sill spot welds in bed of truck. No drilling should be done in the ~4” between parallel rows of spot welds
where the bed sill sits.
CAUTION!
Check for obstructions before drilling. Failure to do so could result in damaged fuel or brake lines, structural members, etc.
CURT MANUFACTURING does its best to communicate tow vehicle manufacturer changes; however, it is ultimately the
responsibility of the installer to prevent damage due to installation.
R
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1
R
O
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2
R
O
W
3
R
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4
NOTE: LATER MODELS WILL
REQUIRE EXCHANGING FORWARD
LONG BRACKETS SIDE TO SIDE
AND REPOSITIONING DRIVER'S SIDE
BRACKET TO ROW 2. THIS IS TO
AVOID BRAKE CABLE HANGER
ON DRIVER'S SIDE. SHOWN HERE
FOR CLARITY.
30" Long Box
25 1/8" Short Box
Measure from rear
edge of truck bed to
rear edge of mounting
rail
Front of
Vehicle
Rear Edge of
Truck Bed
King pin centered over Axle
Axle Center
Mounting Channel
Long Box Bed Sills
Short Box Bed Sills
Long Bracket
Short Bracket
* Optional weld pattern
.25
2
.25 2
*
.25 1.5-3
.25 2
*
Note: Pull wire provided, may be needed
to install hardware in bracket thru frame.
Drivers side of 3/4 ton HD shown
5
Each base rail must have a
bolt in either of the marked
center holes. Check for
obstructions before drilling.
Front of
Vehicle