Some third-generation GMC Canyon owners are experiencing roof flexing issues, particularly in automatic carwashes. The issue arises from the force of the industrial air dryer at the end of the carwash, which can cause a loud pop sound in the roof. Now, GM has come up with a sturdier fix that should solve the problem once and for all.
The fix specifically applies to 2023-2025 GMC Canyon models without the sunroof option (RPO CAC) and built before February 3rd, 2025. It’s a fairly simple fix that applies stiffening patches and a longitudinal roof bow to the underside of the problematic roof panel.
The stiffening panels are to be installed in five locations on the underside of the roof panel, all toward the front of the roof area. The headliner needs to be dropped but not entirely removed. Installation of the roof bow is a little more involved. The roof bow itself has pre-drilled holes where the rivets go, but it needs to be used as a template for holes to be drilled in the underside of the roof structure for said rivets. A depth-control device on the drill bit is recommended.
Once the holes are drilled, structural adhesive is to be applied to both ends of the roof bow. Additionally, panel vibration control material is applied along the length of the roof bow, and then it’s ready to rivet to the roof panel. Once the stiffening panels and roof bow are installed, the headliner is reinstalled, and the repair is complete.
The extra bracing and stiffening in the roof panel should prevent excessive flexing in automatic carwashes and prevent any excessive noise. GMC Canyon owners who continue having problems after this repair is performed should contact their local GM service department, as something else might be wrong with the truck.
More details on the repair procedure and specific part numbers can be found in Bulletin 23-NA-209.
Comments
ditto. I use a 2×4 inside to support mine. Use a “treated one” in case it would happen to burst.
Railroad tie and a bottle jack.
My 2022 Crew Cab 3500 does this in the car wash.
Another GM Engineering failure. Probably ME’s who have nothing but book knowledge and no practical experience from ever working on anything but a computer. Anyone with real world experience understands “oil-canning”. It’s common and should have been expected with a large flat piece of sheet metal. Ribbing and/or structural are needed to stop it. This has been known for 100 years!
Furthermore, if an engineer is hired straight from college without any real world experience, they should have to work 6 months in a dealership mechanic shop and 6 months in the body shop before they get to design anything.
Should have done that during production, would have been alot cheaper
Just another example of gm sloppy engineering.
Quality of materials used and workmanship are absolute rubbish nowadays.
My 2021 Sierra 1500 does the same thing. Roof panel flexes and “pops” in the dryer section of the automatic car wash.
Just another example of GM cutting corners trying save a few pennies while still driving prices up to screw the customer.
Everytime I think I’m going to leave Ram/Jeep for Ford or GM, I read an article and remind myself why I chose a Mopar to begin with. I honestly like the new Colorado/Canyon, but no physical headlight knob, having to keep turning on your fog lights separately everytime your automatic lights go off then on, no standard cruise control, and popping roofs, no thank you. I stick to my Gladiators no matter what kind of crap people say.
I’m glad I got a sunroof with my last 2 trucks since this doesn’t happen when equipped.
Yes, but they will eventually leak
So GMC did the Canyon’s roof differently than Chevrolet did with the Colorado? That seems absurd, as I own the Colorado (2023 Trail Boss) and would have thought that the GM twins were manufactured the same, with the notable exception of GMC front end grill and the interior trim. Glad I have the Colorado then if this is the case!
My ’23 $65000 GMC Sierra does the same thing. Is there a similar fix for this?