Insert sliding clamp into
attachement bow and
rotate 90°, then secure
cab rail to underbody
rail with sliding clamp.
Clamps should be fully secured under
the radius section of the
underbody rail.
Tighten with 1/2” socket to 10 lb-ft.
Position bedrail on truck bed side 1/2” from inside of front bed
wall. NOTE: Make sure that both side rails are positioned
exactly the same distance from the truck bed.
Align the top of the underbody rail flush with the top of the truck
bed and secure the clamps as shown.
NOTE: Clamps should be located as close to the underbody rail
ends as possible.
1/2“
socket
10
lb-ft
10
lb-ft
Place tonno over cab
end of truck box.
NOTE: the cab rail should lay
over the front of bed wall.
1
Extang Corporation
5400 S. State Rd.
Ann Arbor MI 48108
734-677-0444, Fax: 734-677-8409
1/2”
2
3
Carefully refold the tonno
without shifting its position
on the truck bed.
Register your warranty at:
0615-1401
Unfold the tonno fully and
adjust position over the
truck bed for proper
cab/tail
alignment.
• 1/2” So
cket Wrench
• 3/
16” Allen Wrench
