wow pete, whats up with your img,,, it changes every time i load the thread.

 

http://cgi.ebay.com/ebaymotors/DIMME...Q5fAccessories

Is this the right switch I need to get? The one to the left of the steering wheel, correct?

 

check to make sure both of these are the right ones for your yr and model. also check to make sure your getting power and ground to the dash dimmer switch.
this one has both the dash dimmer and headlight switch
http://www.oehq.com/acdelco%2Dparts%...7E1999%20CHEV#

this one is the dash dimmer only.
http://www.oehq.com/acdelco%2Dparts%...28%205%2E7L%2E