For those not familiar, a pickup tends to haves pair of “squared” plastic grille vents spaced equidistant on the rear of the cab wall near the beltline in height. (Shown with truck bed removed). Mounted behind the rear seat-back and the whole of that wall covered with sound-absorbing material, there will be openings nearby to accommodate air movement. A one-way air flap prevents exterior air entry (rain). When you go to shut the doors with the windows all rolled up, the vents equalize the pressure. Their HVAC role is low, but real. If interior air pressure were to build to a number above that of the exterior, they relieve the discrepancy. But I wouldn’t go so far as to think of them as vents that do very much in that regard. (Removing stale air). WEATHERTECH interior-window-channel “vent visors” mounted at the top of the doors exterior are quite effective vents . . literally pulling more air thru the HVAC vents than can be heated or cooled at times. I recommend them highly. Also a handy pathway to run coax thru a back window and route to back of cab. Then use black, “gaffers tape”, both sides of window to seal gap. No rain, no extra noise. No one can see window cracked. As a pathway for coax, the cab vents are out of sight and out of mind. I’d imagine most would route down passenger side door threshold after installation. Those mounting HAM equipment under the rear seat (detachable head) have a truly short coax run to an antenna for mag mount. It’s probably one-dozen bolts to get rear seat from 3rd Gen Quadcab free to lift seat back off of hooks. I’ll count tomorrow. Whenever. Son came by today and nothing much got done except exercising jawbones. .