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Dan
Dan, Technician
Category: GM
Satisfied Customers: 23686
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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truck is overheating. and heater is blowing cold air.

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truck is overheating. and heater is blowing cold air.
Is it going through coolant? V6 or 4 cylinder? Thanks
Customer: replied 6 years ago.
v6... using up all the antifreeze. but antifreeze is not leaking.
Ok, when the vehicle is using up antifreeze without an external leak and overheating it means the headgasket is bad.......Replace the headgasket and problem will be solved.....When you remove head I'd recommend bringing them to a machine shop to be checked out for damage. Let me know if you have questions, thanks.
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