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Why wont my heater blow out hot air only cool air in your 1999 Chevy Tahoe?
Wiki User
∙ 12y ago
I had a similar problem in a 1998 GMC sierra. We found the switch that controls the temperature was bad. The only other thing that I know of is a vac. controlled device called a motor may be bad but those usually control where the air blows, not the temperature.
Wiki User
∙ 12y ago
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