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Disclaimer
The community here at 355nation.net urges you to please use caution and seek professional assistance when performing modifications to your vehicle. Before attempting any modification it is advised that you refer to your Colorado or Canyon service manual or contact a certified mechanic as not all GMT355 trucks are the same. The staff and the associated members are in no way responsible for any damages, injuries or other harm inflicted to your vehicle or yourself which may result in attempting these modifications. The posts and content presented on this site reflect in no way the views of 355nation.net or it’s ownership.
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A 355nation (CCP) presented by
rrcn
Project Name
How To: Checkmate Tonneau Cover Clasp Install
Project Description
All in all, the installation instructions for the Checkmate tonneau covers are absolutely terrible.
Skill Level
Easy
Project Vehicle
Make: Chevrolet
Model: Colorado
Year: 2006
Engine: 2.8L
Power windows: Yes (aftermarket)
Sun Roof: No
Tool Needed
Drill
Screwdriver
1/8" drill bit
Marker
Project Time
less than an hour
Project Cost
This is part of the tonneau cost.
It's not difficult, but if you haven't installed one before, it will take some time...well at least it did for me.
Anyhow, what's really vague is how you're supposed to install the clasps that secure the tonneau down. It tells you to look for the predrilled holes, but there are none, so don't bother looking for them.
So here's my quick little write-up :high5:
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. By marking over the groove, the clasp should clear the bedrails.
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.
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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.
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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.
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![]()
The community here at 355nation.net urges you to please use caution and seek professional assistance when performing modifications to your vehicle. Before attempting any modification it is advised that you refer to your Colorado or Canyon service manual or contact a certified mechanic as not all GMT355 trucks are the same. The staff and the associated members are in no way responsible for any damages, injuries or other harm inflicted to your vehicle or yourself which may result in attempting these modifications. The posts and content presented on this site reflect in no way the views of 355nation.net or it’s ownership.
A 355nation (CCP) presented by
rrcn
Project Name
How To: Checkmate Tonneau Cover Clasp Install
Project Description
All in all, the installation instructions for the Checkmate tonneau covers are absolutely terrible.
Skill Level
Easy
Project Vehicle
Make: Chevrolet
Model: Colorado
Year: 2006
Engine: 2.8L
Power windows: Yes (aftermarket)
Sun Roof: No
Tool Needed
Drill
Screwdriver
1/8" drill bit
Marker
Project Time
less than an hour
Project Cost
This is part of the tonneau cost.
It's not difficult, but if you haven't installed one before, it will take some time...well at least it did for me.
Anyhow, what's really vague is how you're supposed to install the clasps that secure the tonneau down. It tells you to look for the predrilled holes, but there are none, so don't bother looking for them.
So here's my quick little write-up :high5:
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. By marking over the groove, the clasp should clear the bedrails.
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.
