WFM,
I had the same problem with my Suburban.
No, really, kind of. We take long trips and it was just too uncomfortable keeping my weapon in my holster for the deration.
What I ended up doing was getting a left handed holster and mounting it btwn my seat and the counsel (Captains Chairs w/counsel btwn them). The grip of the gun sat just even with the seat. I'd switch the gun over when I got in. Worked just find for me but when my wife drove the car the seat was waaaaay forward and that put the weapon too far back for quick excess for her.
I then got one of my old holsters (right handed) that had tention adjustment in it and mounted it under my dash. It is directly beneath the ash tray (which we don't use except for change). The butt of the pistol sticks out from under the dash... however, with the ash tray down it is mostly covered. To access it (either wife or I) all we do is grap the butt... (it is at such an angle that just grabbing the butt causes the ashtray to close) and pull.
If you sit in your car and think "outside the envelop" on where to mount a holster I'm sure you will find some place suitable that allows quick excess to the gun.
Another option would be a specific holster made for driving. A few makers have these. They snap onto your seatbelt and the gun rests on your lap in the holster.
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Schmit
GySgt, USMC(Ret)
NRA Life, Lodge 1201-UOSSS
"Si vis Pacem Para Bellum"
[This message has been edited by Schmit (edited May 06, 2000).]