Question about 2002 Chevrolet Tahoe
Thanks for using FixYa. The a/c and heating systems on cars today are pretty complex. 10 years ago replacing the thermostat usually did the trick, but today there are electric motors that operate the "blend doors" inside the dash…directing air flow from the heater core and A/C evaporator core to the cab of the vehicle. Always start by checking the actual coolant level inside the radiator itself to make sure it is full. Then feel the upper and lower radiator hoses to see if they are hot (when the engine has been running awhile and has reached normal operating temperature), then feel the two heater hoses leading into the cab of the vehicle to see if they are both hot as well. If you feel a drastic difference in one of the radiator hoses, replace the thermostat. If all the heater and radiator hoses are pretty much the same temperature I would suspect there is a control problem in the dash controls or in the blend door operation and a visit to dealer or a qualified mechanic is vital. Please do accept the solution if the issue is resolved or post a comment for further assistance.
Posted on May 06, 2010
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Posted on Jan 02, 2017
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