PontiacBonnevilleClub.com

I was looking into some HVAC issues, looked at the relay center under the hood, and there's no relay in the spot labeled HVAC SOL. What does the SOL stand for (as opposed to S.O.L. ).

Thanks.

It doesn't apply to our cars, it should be an empty spot.

http://en.wikipedia.org/wiki/Sol-air_temperature