CHEVROLET TAHOE HEATER

This Past Winter I Noticed That Sometimes I Couldnt Switch From The Heater To A/c. The Air Would Stay Hot Until Shut The Car Off. Now My A/...

My Cooling System Has Been Slowly Losing Coolant. On Heater Hose That Attaches To Block Just Behind The Alternator There Is A Lot Of Crud/...

My Aux Heat Works Fine But All Of The Vents In The Front Blow Cold When The Thermostat Is In The Hot Position. I Don't Think It's...