"Please use caution and seek professional assistance when necessary. ColoradoFans.com, myself and all associated members are not responsible for any damages, injuries or other harm which may occur with this modification. This post does not reflect the views of ColoradoFans.com and it's ownership." Before attempting this modification, it is advised to verify your Colorado or Canyon service manual or a certified mechanic, as not all GMT 355's are the same!
A CFans Members Mod Projects/How-To by rrcn
All in all, the installation instructions for the Checkmate Tonneau covers are absolutely terrible.
It's not difficult, but if you haven't installed one before, it will take some time and having a helper handy is almost a must.
Anyhow, what's really vague is how you're supposed to install the clasps that secure the Tonneau down. The instructions tell you to look for the pre-drilled holes, but there are none, so don't bother looking for them.
Here, we'll go over how to install these clasps.
Model: Colorado WT 2WD
Body Style: Regular Cab, Long Bed
Bed Liner: BedRug
1/8" drill bit
Screw driver attachment for the drill
Zip knife (utility knife)
A marking utensil (Sharpie)
Supplied sheet metal screws
From the end of your tonneau, measure out 6 1/4" and place a mark over the small groove. This groove will act like your center punched marking and by positioning the clasps here, it should allow them to clear the bed rails.
But before you drill your hole, place the clasp over the marked location and double check to make sure it clears the edge of the frame. Obviously if it doesn't, your cover wont shut.
Once you're sure it'll clear, drill your 1/8" hole. This hole will be where the leading screw will go into.
Screw in that one screw and using the other free hole, mark the second location.
Drill and drive in screw number 2.
Now for those who have a BedRug you will need to pull the rug back.
Next, close the lid and place the latch over the clasp as shown.
Mark around the latch as best as possible while holding the Tonneau down to ensure as flush of a fit as you can get.
Open the Tonneau and place the latch in the outlined location. Since the clasps are rubber which means they're stretchable, I shifted the latch a hair further down so that when I go to lock it in place, I can stretch the clasp down to make sure I have a super tight fit.
Then mark and drill your holes.
Secure the latch in place.
Start reapplying the rug in place and press against the latch so it can mark it's location into the foam backing.
Pull the rug back and make your incision from the rear (foam side).
Then reapply the rug making sure the latch pokes through.
And there you have it.