Auxiliary fuel tank switch location

[67sss]

How many different spots in the cab did the factory put the aux tank switch? I've seen them to the left and down of the driver, also( I think) over in the ciggy lighter area. I looked at a 72 3/4t that had a switch in the area to the left of the speedo( no pic, yet) in the metal area. Wonering if it's a factory thing or a "Red Green" thing. Kinda hard to describe it. Any help or pics would be appreciated.

[jocko]

The usual factory aux tank (NL2) fuel tank selector switch location for the single aux tank is down on the left sill in front of the seat belt - accompanied by the fuel gage selector switch up above the left a/c vent. The others were normally dealer installs (i.e. not factory) or entirely aftermarket arrangements (usually duals, but not always) and usually had the same lower left sill switching location. Some came with a fuel gage selector valve and some didn't.

EDIT: General rule of thumb
- floor switches are mechanical and switch the tank from which the fuel comes
- dash switches, if present at all, are electrical and switch the source for the fuel gage to display

[jocko]

There is also a 1970 N18 factory option.
Good info in the below threads:
http://67-72chevytrucks.com/vboard/s...=1#post5746173
http://67-72chevytrucks.com/vboard/s...d.php?t=557561
http://67-72chevytrucks.com/vboard/s...d.php?t=476843
http://67-72chevytrucks.com/vboard/s...d.php?t=572530
http://67-72chevytrucks.com/vboard/s...=560607&page=2
http://67-72chevytrucks.com/vboard/s...d.php?t=535733

[67sss]

Thanks jocko.......1rst link #10 post/pic is exactly what I'm taking about. Just got the truck home tonight, perfect timing!