2004 Chevrolet Tahoe "car blows warm higher speeds" Questions

...blows out cold air. Then when I start driving my engine temp gauge drops and my heater start blowing warm air again. Does anyone have an idea what might be going on? Thank you. check coolant level ...

blows out cold air. Then when I start driving my engine temp gauge drops and my heater start blowing warm air again. Does anyone have an idea what might be going on? Thank you. you have air trapped in

...Warm NOT hot air or Ac blowing intermittently between and mostly on defroster. even though it is set on dash vents as i want to. At higher speeds on freeway it blows mostly on defroster. Poor air ...

heater blows luke warm air if i put but blower on anything over two speeds anything higher blows cool air What's your location? Your thermostat may have failed, have the cooling system checked.

...blows warm air when idling @ stop light - works ok at higher speeds You need to recharge your a/c, and check its fuses. It's not blowing cold air at all, even when you are driving, because when ...

...blows luke warm air when at higher speeds.(sometimes) The overflow and main are both clean, not rusty or dirty. air blend door jammed, or you have lost vacumn to the diaphram that opens and closed ...

High idle at start, using tremendous amount of fuel How high is the idle speed? I know Tundras, especially the V8s have a high idle speed in order to heat up the engine because it runs better at a ...

...blows cold air unless going at a higher rate of speed such as the Interstate, then it will blow warm air occasionally but never really warms up the car. If sitting at idle it never warms up at all. ...

ac warm at idle blows fine at higher speeds check for a dirty condenser and clean if necessary then check A/C pressures, the system maybe low on Freon.

...warm in traffic but cools down significantly at higher speed. I agree with philip, i have not studied the electrical system. but to my best guess the electric fans are tied into the engine cooling ...