I have a 97 Chev S10 LS, the heater is not working. It will work if the truck runs at 45 mph or faster [warmer mileage]. There is not a leak from my radiator or heating system in or outside the vehicle and i'm not losing fluid levels [unseen slow leak? No]. Looking for a diagnosis and instructions on repair.
Saturday, January 13th, 2007 AT 2:54 PM