GMC C1500 Heater Not Working

The Controller Does Not Do Anything. It Will Not Light Up Either.

When I First Start The Truck, The Heat Control Knob Will Allow Me To Heat The Cab. Once I Turn The Knob To It's Mid Position, Turning The...

Fan Will Only Work On High Setting Will Not Work On #1 Thru #5 Setting

Blowing Cold Air.

My Name Is Josh And I Am Having A Heater Problem. When I Turn On My Heater It Only Blows Out Of My Defrost Vent It Will Not Turn Hot Not...

My Heater Stopped Blowing Heat Out But Once The Truck Heats Up And I Get Going Down The Road Doing 50mph Pluse It Pushes Heat Threw My Vents...

Heater Problem 1997 Gmc C1500 6 Cyl Two Wheel Drive Automatic Heater Fain Can Not Be Turned Off. It Runs At Full Speed Upon Starting...

Have Changed Thermostat Numerous Times (now Has A 205° Instead Of The 180°), Also Radiator Cap Several Times (now Has Locking), New Water...

My Heat Diplay Flashes When I Turn It On. All The Controls On The Heater Work Except The Heat Control Just Flashes. I Have Ruled Out All The...

Instead Of One Indicator Arrow, It Flashes All Arrows. The Blower Motor Works Fine. 1 Year Old Thermostat, Radiator And Reserve Full. Not...