How to Install Weathertech Roll Up Truck Bed Cover - Black on your Sierra

NOTE: Some installs require drilling/bolting. Those kits will contain special side rail instructions. Follow those instructions for rail attachment in conjunction with instructions in this owner’s manual.

A. Position side rail with weather strip against inside lip of box. Push rail forward until it touches front of box. End of rail with strike goes to rear.

B. At front, adjust top of rail flush with top of box and hold it there with assistance of another person or with a spring clamp.

C. Install first clamp as close to front as possible and use 1/2" wrench to tighten.

IMPORTANT TO KEEP RAIL ON TRUCK SECURELY: Before using wrench on clamp, make sure clamp teeth engage grooves on rail, turn nut finger tight and then use wrench.

D. With rail flush at top of box and clamp teeth engaged, tighten clamp. Check if rail is level. If rail tilts up, loosen clamp, lower it, engage teeth and tighten it. If rail tilts down, loosen clamp, raise it, engage teeth and tighten it.

E. Install second clamp on rail at midway point of box. Adjust rail flush at top of box and repeat clamping procedure, always making sure teeth are engaged on rail grooves.

F. At tailgate, adjust rail height flush with top of tailgate. Repeat clamping procedures placing third clamp as close to tailgate as possible. NOTE: For trucks with an electric tailgate, rails will have to be installed slightly higher (approximately 3/16") to eliminate interference. Most short box kits contain 6 total clamps. Install 3 per side rail. For kits with 8 total clamps, install the 4th clamp between 2nd and 3rd clamp on each side rail. Repeat STEP 1 to install rail on opposite side. When done, make sure all clamps are torqued to 15-20 ft-lbs on both rails.

NOTE: For best adhesion, air and surface temperature should be above 600 F.

A. At front of box header, clean top surface with alcohol pad (wash first if needed). Save alcohol pad for use in Step #3.

B. Peel paper back, align and adhere front header seal at one corner across box to opposite corner and cut to length.

NOTE: For additional protection–locate and seal miscellaneous factory holes, crevices, stake pockets, etc. that may be on box (sealant not included).

NOTE: For best adhesion, air and surface temperature should be above 600 F.

A. Clean underside of rail w/ alcohol
pad included. Hold seal up to end of
rail, make sure end of seal contacts
edge of box.

B. Mark leg of seal and cut notch in
seal.

C. Peel paper back, align and
adhere seal at end of rail.

D. Edge seal installed.

A. The cover comes pre-rolled to its normal open position for ease of installation. Set pre-rolled cover on tailgate with front bar facing up as shown. Align tension adjuster (marked “L”) on driver side of cover - positioned as shown in photo.

B. Turn 1-1/4" bolt with flat washer
onto nut in bar. Leave loose for
now. See photo. Repeat for tension
adjuster (“R”) on passenger side of
cover, and leave that bolt loose also.

A. Set rolled up cover on rails at front of box (behind cab) with bar facing up. Roll cover bar onto front of rails and fold/tuck vinyl flap under. Now bar will face down. Let straps hang to inside of box. Push cover bar forward until it sets flat on front of side rails and overhangs them.

B. Slide left tension adjuster over until it engages under side rail. (See photo in Step 5E for tension adjuster tab under side rail.) Push bar back and forth to line up holes. Do not turn dial wheel. Insert bolt from top, flat washer and nut from bottom.

C. Hold bolt at top and tighten nut under side rail. Repeat procedure for right hand tension adjuster.

D. Center the front bar between the two side rails.

NOTE: Before tightening, make sure vinyl weather flap is still tucked under front bar.

E. Then tighten bolt (left loose earlier) under front bar on each tension adjuster.

A. Unroll cover and place rear bar into strikes on side rails. Press down on bar to close (20-30 lbs. pressure). The cover fabric may be tight. Over time under tension it will conform to its hardware and loosen slightly. If bar is too hard to push down, adjust tensioners equally as needed to close.

B. Close tailgate slowly - top of tailgate should fit snug under cover bar. If cover hampers normal tailgate operation raise rails by loosening rear clamps; adjust rails up; and tighten clamps. If there is too much gap between tailgate and cover bar, lower rails by loosening rear clamps: adjust rails down; and retighten clamp.

IMPORTANT: When done, go back and double check each clamp and make sure it is fully tight. Start behind cab and work towards tailgate.

C. Check cover tension by releasing the dual locking system and open and close rear bar several times. It should snap down when closing. Cover fabric should be tight with no sagging between the bows. If adjustment is needed, roll cover open and to loosen turn tension adjuster Clockwise. To tighten turn tension adjuster Counter Clockwise. Always turn Dials in Equal amounts.

D. When done, always seal both
sides of cover with hook and loop
system. For detailed operating
instructions see Page 8.
TIP: Reasons to keep cover drum tight:
1) Lasts longer
2) Less noise
3) Looks nicer

Release retainer straps at front and using both hands roll cover to rear of box.

Position roll-up bar against strikes. Push down on bar until dual locking system locks in place.

Along side of box, seal cover edges with hook and loop sealing system the full length of cover on both sides. Pull with one hand seal with other hand.

Open tailgate, lightly pull down on dual locking system and rotate rear bar with other hand.

Using both hands, roll cover toward front of box (not against the cab).

Securely fasten retainer straps to store the cover. ​

To tighten storage strap ...pull back on top layer of strap loop until strap is snug.

To take out slack in loop ...slide slip bracket down.