I have a 67 RS with the optional console guages. I have the origonal window sticker, it shows Option #5U17BH "Instrument Cluster".
Besides the console guages, you get the tach, and low fuel light all together.
The console is a mandatory option with the Instrument cluster.
Check to see if the light is there. It should be a red square at the bottom left side of the spedo, to the right of it is the "Brake" warning, on the tach, is only the RH turn signal indicator.
A non-guage car has from left to right:
OIL, BRK, GEN, TEMP.
Sometimes the screw in light sockets fall out from the back of the tach.
If you shine a light into the hole you should be able to read the red lense. If not, it may be sun damaged.
The console must be ordered with the instruments.
Check my web page for First Gen Camaro suspension info:
David's Motorsports page
First Gen Suspension Page
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Chev 350 Can-Am Vintage Racer