backup light switch

[ronhartigan]

I have a 99 Tahoe 2door 4WD with 350 V8 and auto trans. The backup lights haven't worked since bought used. I have all new tail light units with new bulbs (the old ones didn't work either), and checked the appropriate fuses. About the only thing left is the backup light switch, but I have no idea where it is; probably on the gearshift column or on the transmission itself. There's nothing in my Haynes (inadequate) manual about it. Any help of photos would be welcome. See a picture of this 99, if I can figure out how to post. House of Kolor Lime Time Green with Gold Pearl Base. Chrome nerfs, handles, GMC grille, smoked headlights and directionals.

Thanks

 

[bsamoul]

I think it's on the transmission?

 

[bai78]

PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS

1. CHECK condition of TURN B/U Fuse 16.If fuse is open, LOCATE and REPAIR source of overload and REPLACE fuse.
2. CHECK Back up Lamps for damage to filament or corrosion between bulb and socket.
3. CHECK adjustment of Back up Lamp Switch.
4. CHECK that Ground G401 is clean and tight.