How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask car tech Your Own Question
car tech
car tech, ASE Certified Technician
Category: GM
Satisfied Customers: 3332
Experience:  25 year master tech and shop owner
Type Your GM Question Here...
car tech is online now
A new question is answered every 9 seconds

2004 GMC yukon XL 2500: idling..Running down the fine

This answer was rated:

My 2004 GMC yukon XL 2500 heater only blows cold air while the car is sitting idling. Running down the highway the heater works fine.
Is this an expensive fix? What is involved. Vehicle has 54,000 miles. Thanks, John

Welcome I will be assisting you. Please give me as much information as you can no matter how insignificant. If at anytime you need more information please ask. When you are completely satisfied then please accept my answer and leave positive feedback. If you cant leave positive feedback then my job is not done. Please ask for more information.


this is usually caused by low coolant or a bad radiator cap

car tech and other GM Specialists are ready to help you