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2002 Denali Getting To Hot With Ac On

pazzo811

By pazzo811
in Ask A GM Technician

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pazzo811 New Member

pazzo811

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HI I HAVE A 2002 YUKON DENALI I BOUGHT THIS TRUCK IN 05 WITH 55K MILES HAVEN'T DONE ANYTHING TO THIS EXCEPT FOR REGULAR OIL CHANGES AND AND BRAKES AND ROTORS .IAM HAVING A PROMBLEM WITH THE AC IT IS FREEZING COLD WHILE DRIVING BUT KNOW WHEN IAM SITTING IN TRAFFIC OR IDLE THE AC IS NOT AS COLD AND THE TEMPERATURE GAUSE GOES ALMOST TO RED BEFORE I SHUT OFF? ALSO I WOULD LIKE TO DO A TUNE UP WERE SHOULD I START FIRST THANK YOU GUYS?

Wingnut Senior Enthusiast

Wingnut

Posted
Posted

You need to add coolant/water. Check your thermostat.

 

You've probably got a coolant leak somewhere. If it never comes out onto the ground, then it could be a head gasket (leaking into the motor).

 

Does it ever blow white smoke?

desrtrat Senior Enthusiast

desrtrat

Posted
Posted

check your clutch fan, may need replacing. also check to see if there is any obstructions in the radiator , leafs, dirt, bugs. also when was the coolant changed/flushed. i know my 03 ac will get a little less cold in traffic, or stopped. caused by less air flow at low speed. when GM put E-fans in the 1500 in 05 a lot of the ac issues went away.

 

hope this helps, good luck

txab Senior Enthusiast

txab

Posted
Posted

As stated above, check and replace the fan clutch if necessary and/or clean the condenser and radiator fins. What you describe are classic symptoms of low airflow.

pazzo811 New Member

pazzo811

Posted
  • Author
Posted
You need to add coolant/water. Check your thermostat.

 

You've probably got a coolant leak somewhere. If it never comes out onto the ground, then it could be a head gasket (leaking into the motor).

 

Does it ever blow white smoke?

 

 

TRUCK NEVERBLOWS WHITE SMOKE ALL FLUID ARE PERFECT NO LEAKS NEVER FLUSH OR CHANGED FLUIDS IS THIS SOMETHING I CAN DO MY SELF THANKS

pazzo811 New Member

pazzo811

Posted
  • Author
Posted
check your clutch fan, may need replacing. also check to see if there is any obstructions in the radiator , leafs, dirt, bugs. also when was the coolant changed/flushed. i know my 03 ac will get a little less cold in traffic, or stopped. caused by less air flow at low speed. when GM put E-fans in the 1500 in 05 a lot of the ac issues went away.

 

hope this helps, good luck

I GOTTA CHECK CLUTCH FAN IS IT SUPPOSE TO RUN ALL THE TIME OR WHEN THE TRUCK REACHES A CERTAIN DEGREE THANKS

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