Hi, I got a 91 teg and everytime I turn on the A/C the temp gauge goes up to redline... so far it hasn't overheated yet because I always turn the A/C off before it does. Does anybody know what's wrong with it? Thanks!

 

Sounds like a weak cooling system. Replace the thermostat and flush the system, see if it tries to overheat again. If it does, it probably needs a new radiator.

I don't remember, the G2's have two cooling fans, yes? One normal fan and one A/C fan? If so, check to see if the secondary fan turns on with the A/C.