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C. Walker, Jr.
C. Walker, Jr., Auto Mechanic
Category: Chevy
Satisfied Customers: 710
Experience:  Shop training and experience.
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Heater on 03 Silverado only works at 90 degree setting.

Customer Question

Heater on 03 Silverado only works at 90 degree setting. Coolant Temputure on truck fluctuates
Submitted: 1 year ago.
Category: Chevy
Expert:  C. Walker, Jr. replied 1 year ago.

So if it is at any other setting it blows cold air?

Customer: replied 1 year ago.
Customer: replied 1 year ago.
Coolant temp fluctuates
Customer: replied 1 year ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Expert:  C. Walker, Jr. replied 1 year ago.

We need to replace the temperature sensor first this will take care of the fluctuating gauge and should take care of the heating issue I suspect the sensor is bad that is causing both of the issues.

Expert:  C. Walker, Jr. replied 1 year ago.

Here are the steps from the manual CLICK HERE