I would like to know how to fix the problem with my 2004 G.M.C. sonoma. 2 months ago, it started to blow cold air, I checked the Anti freeze, and it was low. I put in Dex-Cool and the Heater started working again.I just found out from my wife it is blowing only cold air again? Other than putting in more Dex-Cool, what else should I do?
Jan 28, 2010 at 1:34 PM