Tonneau cover for CarbonPro??

Truckasaurus · December 30, 2019

Got it installed today. Went pretty smoothly. The passenger side bed cap was riding up a little so make sure to check for that and press down on the cap before you drill. One hole I had to oval out a bit because the cap riding up caused the drilled hole to be a little low.

I didn’t have a 7mm or 9/32” bit so I used a 1/4” and it worked just fine.

I highly recommend using a torque wrench to tighten the bolts to 8.7NM (77 in-lbs). The way the rail attaches, it feels like you can keep going a bit more when the wrench clicks, so it’s hard to do by feel. Also re-check torque if fasteners after you torque the last one.

I noticed a light gap at each corner up by the cab. Some adhesive-backed silicone foam tape or the like Should fix that if water tightness is important. Same goes for the space between the two portions of the multi-pro.

Tighten the securing bolts evenly. The manual says this, and it is important to ensure the tonneau is alighted well so that the slam latches all work properly.

Sam De La Cruz · December 31, 2019

Is this a GMC cover? Did they install it at the dealership?

I just got a 2020 AT4 Carbonpro and the techs at the dealership had not seen a CP bed.

Shawn Garneau · December 31, 2019

Yes that’s a gmc cover. I ordered it from my dealer and installed it myself. I’m sure they’d install it at the dealership if you wanted them too.

Truckasaurus · December 31, 2019

5 minutes ago, Sam De La Cruz said:

Is this a GMC cover? Did they install it at the dealership?

I just got a 2020 AT4 Carbonpro and the techs at the dealership had not seen a CP bed.

If you start and the top of this tread and read the whole thing, you'll get part numbers, installation instructions, etc.

Truckasaurus · December 31, 2019

On 8/22/2019 at 2:47 PM, Joshua Pessin said:

The tailgate kicker system was factory on mine, but I had to add the tailgate step lights. I had negotiated the tonneau cover in the purchase price. Since they couldn’t install a tonneau, I had them install the cold air intake, they gave me a bed bag, and a refund check for the rest. For my purpose, the waterproof cargo bag is just fine, and LOVE the cold air intake!

Can you add tailgate step lights if you already have the Kicker system? It looks like the lights go into spaces already occupied by the sound system... Thx.

Joshua Pessin · January 1, 2020

9 hours ago, Truckasaurus said:

Can you add tailgate step lights if you already have the Kicker system? It looks like the lights go into spaces already occupied by the sound system... Thx.

Yes. Mine had the factory installed kicker tailgate sound system and I had the dealer add the step lights. There is a separate cutout for the lights.

t_sivle · January 2, 2020

I just bought a 2020 Sierra SLT with CarbonPro bed, from reading this thread I'm assuming this bed option was only available for the AT4. Since no other tonneau bed covers were available I order the P/N from page 3 of this thread from the dealer for ~$1,150 including tax. Since they didn't have time that day to install I decided to do myself and I discovered it's not an exact match for the SLT model 5'8" bed. Here is what I found.

The J-nut's are too short and don't line up with the round predrilled holes in the bed rail.
- Solution - I cut J-clips in half and just used the nut side. Be careful if you do this, hold the cut J-nut with a tool when tightening the bolt.
The 4th predrilled hole from the cab on the bed rail does not line up with the predrilled hole on the cover rail.
- Solution - after installing the cover rail with the other available predrilled holes I drilled through the plastic and bed rail and inserted the nut and bolt.
The 6th hole from the cab is just a square hole on the bedrail and is missing the Rivnut.
- Solution - none that I know of, there is no access to put a nut so I didn't install anything here. Later I will look at wall anchors or something similar.

Edited January 4, 2020 by t_sivle
spelling correction

KyleLaw2327 · January 13, 2020

On 1/2/2020 at 11:25 AM, t_sivle said:

I just bought a 2020 Sierra SLT with CarbonPro bed, from reading this thread I'm assuming this bed option was only available for the AT4. Since no other tonneau bed covers were available I order the P/N from page 3 of this thread from the dealer for ~$1,150 including tax. Since they didn't have time that day to install I decided to do myself and I discovered it's not an exact match for the SLT model 5'8" bed. Here is what I found.

The J-nut's are too short and don't line up with the round predrilled holes in the bed rail.

Solution - I cut J-clips in half and just used the nut side. Be careful if you do this, hold the cut J-nut with a tool when tightening the bolt.

The 4th predrilled hole from the cab on the bed rail does not line up with the predrilled hole on the cover rail.

Solution - after installing the cover rail with the other available predrilled holes I drilled through the plastic and bed rail and inserted the nut and bolt.

The 6th hole from the cab is just a square hole on the bedrail and is missing the Rivnut.

Solution - none that I know of, there is no access to put a nut so I didn't install anything here. Later I will look at wall anchors or something similar.

Edited January 13, 2020 by KyleLaw2327
Didn’t post this

KyleLaw2327 · January 13, 2020

Just went ahead and bought the Bakflip Revolver x2. Measured a drilled holes to be exact for brackets.

2 hours ago, KyleLaw2327 said:

Edited January 13, 2020 by KyleLaw2327

KyleLaw2327 · January 13, 2020

Eric Truck · January 17, 2020

On 11/23/2019 at 8:42 PM, Shawn Garneau said:

No it doesn’t...it folds back upon itself twice. That third fold doesn’t move. So essentially if you need the entire bed for something large...you’d have to pull the cover off. I’ve been using an extang solid fold for the past ten years and it works the same way so I’m used to it. But if you always have large things in the back of the truck then this might be more of a hassle...but again...for the couple times a year I need my full bed...I’ll just pull it off.

Hey Shawn. I know you are probably beaten by a ton of questions about the bed cover for your truck but I was just curious how weather tight it has been for you? I don’t expect it to be water tight but was curious about your experience with it was so far. I really appreciate any feedback you could provide on the cover beyond what you put in your posts. You have really been a ton of help already!

thanks.

Eric Boog

Extractor · January 21, 2020

I just bought and installed one of the GMC trifold hard tonneau covers on my 2020 AT4 Carbon bed. I'm embarrassed to say it took me 2+ hours to install. I think the French version of the instructions was clearer than the English.

I did lose 2 J clamps inside the frame of the bed and I missed a clamp on each side with drill hole, so mine only has 4 bolts each side...

Its heavy and clunky and it will NEVER get taken off, it's just too difficult, so I hope the wife doesn't buy something big to bring home.

Not impressed but it was the only option out there...

Sam De La Cruz · January 22, 2020

Don't be embarrassed. I took my 2020 AT4 to my local dealership and they took almost 5 hours. They mention it was the first cover for a Carbon pro bed. I used some of my GMC rewards which gave me a very good price (40.00 installation).

2020 CarbonPro · January 23, 2020

I just purchased a new 2020 Sierra AT4 1500 with the Carbon Pro package. My local tonneau cover distributor says there is not an option available for covering the bed. Highly disappointed.

Truckasaurus · January 24, 2020

On 1/21/2020 at 9:47 AM, Extractor said:

I just bought and installed one of the GMC trifold hard tonneau covers on my 2020 AT4 Carbon bed. I'm embarrassed to say it took me 2+ hours to install. I think the French version of the instructions was clearer than the English.

I did lose 2 J clamps inside the frame of the bed and I missed a clamp on each side with drill hole, so mine only has 4 bolts each side...

Its heavy and clunky and it will NEVER get taken off, it's just too difficult, so I hope the wife doesn't buy something big to bring home.

Not impressed but it was the only option out there...

I don't think it's any heavier than a comparable tri-fold from Bakflip or Undercover, etc., but yes it is bulky and heavy. They warn you it's a two person job, but being myself, I took that as a challenge to do it solo.

Also, from my unboxing experience, the cover was awkwardly folded inside the box with a bunch of styrofoam, so it WILL be easier to fold and remove/install in the future versus the first time.

If you think one of these suckers is too heave to consider removing and reinstalling, go check out one of the aluminum rolltop ones..