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Ok, curiosity got the better of me. I popped this thing out a few minutes ago. There's a wiring harness on the back of it, connected to a dummy port, so that must be for the super cab air bag shutoff.
I took two pieces of velcro, attached one piece to the upper inside of the box and attached the other piece to a Garmin mounting disk, then attached the Garmin suction mount. It's cooling off here now so I'll let it sit in the house overnight and put it back together in the morning to see how it works.
Ok, curiosity got the better of me. I popped this thing out a few minutes ago. There's a wiring harness on the back of it, connected to a dummy port, so that must be for the super cab air bag shutoff.
I took two pieces of velcro, attached one piece to the upper inside of the box and attached the other piece to a Garmin mounting disk, then attached the Garmin suction mount. It's cooling off here now so I'll let it sit in the house overnight and put it back together in the morning to see how it works.
Hey, I'm quoting myself! Go figure. Anway, outcome: fail. With the ball mount hanging down from the inside of that box, the Nuvi can't pivot up enough to be useful. I'm on to my next plan for mounting the Garmin and will think of something else for that useless tray. I may cut the back out of it and extend it so I can at least store something in there like a wallet.