Owners manual

Chevrolet 73 to 87, 73 to 92 4-door (GMC) (34” Straight, with Outside Shock Absorbers)
CAUTION!
Read pages 2-3 of these instructions before starting installation. Failure to do so could result in significant vehicle damage!
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
O
W
1
R
O
W
2
R
O
W
3
R
O
W
4
Front of
Vehicle
Measure from rear
edge of truck bed to
rear edge of mounting
rail
Rear Edge of
Truck Bed
Drill through
bed and truck
frame
34 7/8" Long Box
and Short Box
Mounting Channel
Long bracket
DO NOT Torque to 85 lb-ft
(tighten but do not crush bed sill)
Install spacer with 1/2" hole between
frame and bed. (Cut provided tube
spacer down to fix snug betweeen
frame and bed.)
Bed Sill
Drivers side of 1/2 ton Chevy Long Box Shown
*Optional weld pattern
.25 1.5-3
.25 2
*
7
King Pin Center approximately
3 1/2" forward of Axle Center
Axle Center
Each mounting rail must have
a bolt in either of the marked
center holes. Check for
obstructions before drilling.
Front of
Vehicle