Ok, not Blazer related because it is a Firebird but it could be Blazer related if I had a 7.0 so I will ask it here anyway.

Watch this vid

http://videos.streetfire.net/video/wm/109B6AA9-7370-45E9-81F2-0CBE4A458144.htm

What is the red light he turns on and off on the dash before and after warming up the tires and secondly what is that little switch he holds in his right hand before he leaves the line? I am not a drag guy so I do not know what those things do.

Thanks!

The red light was a line lock switch. You pump up the brakes and flip the switch, and it holds the pressure on just the front brakes. This let's you do a better burn out without burning up the rear pads.

The switch in his hand was the transbrake. It locks the tranny in 1st and reverse, so that you can spool up the torque convertor with out actually sending any power to the wheels. Think of it kinda like a clutch for an automatic.

Ahh, thanks for the info.