Next trip to HD, pick up a rare earth magnets pack and super glue one to the Fernco cap face and one to the door to hang the cap during fuel up.
https://www.homedepot.com/p/Master-Magnet-0-47-in-Neodymium-Rare-Earth-Magnet-Discs-6-per-Pack-07046HD/202526367
I would be glad to trade both, the bed and interior outlets for a darn sunglass holder or maybe an armrest or maybe entry buttons on the rear door handles or maybe turn indicators in my tow mirrors etc.
Ya know, maybe something useful.
Sigh
Welcome to the club and congrats on the new truck.
I used to drive by feel and sound with my 05 2500.
When I traded it in a my 2020, I had to start driving by speedo gauge again. LOL
0-80mph towing the boat in just a heart beat and have to slow down back to 70mph.
Zoom Zoom
Copied Ryno12s idea with the 2x6 lumber.
Cut the center of the long cross board and added a 4'" door hinge on the font side.
Push to front to fold out and pull to rear to fold in.
The short legs against to tailgate and the long ends against the wheel wells keep it in place
Fold ups and stows nicely in the truck when not needed.
I would love to see this actually happen for you but I fear your salesguy probably used to sell bridges and swampland.
So far my search to do this has been fruitless.
Is this a dealer install or after market install on the cap?
Who knows.
I don't believe anything they say unless I can see it for myself.
The sales people and service people all have to attend the same "How to lie to the customer with a straight face" class when hired, no matter the manufacturer or dealer.
Trust, but verify, has usually proven my cynical nature to be correct in past conversations and with dealer personnel.
If the 15 seconds is indeed a bypass to a timer, that in it's self maybe a clue to the reason for the timer.
No more parking in an attached garage or enclosed space and accidentally leaving the car running, possibly resulting in a death.
Liability.
A deliberate override is needed to keep the vehicle running and becomes the consumer failsafe, hence why no documentation in the owners manual.
Someone mentioned a few pages back about a new style window frame, but time has not proven it to be a solution.
Rumor has it that GM has now deemed the T1 platform leakage problem to indeed be in the "rocket science" category and have requested help from NASA and JPL.