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 Bill Your Own Question
Bill, Chevy Technician
Category: Chevy
Satisfied Customers: 1776
Experience:  GM Certified Master Technician
Type Your Chevy Question Here...
Bill is online now
A new question is answered every 9 seconds

my silverado makes a clicking noise under the dash but yesterday

This answer was rated:

my silverado makes a clicking noise under the dash but yesterday only one side would put out cold air the other side hot,a restart would solve the problem with the air but it still makes a clicking noise,what could it be

Welcome to Just I'm here to help you and your 100% satisfaction is my goal.



THis is commonly caused by a failed a/c temperature actuator. When the actuators internal sensor fails, the actuator will often move back and forth and "hunt" for the correct position. Which side of the dash was it blowing hot on? The left side is relatively easy however if it is the passenger side, it requires dash removal to access.




Customer: replied 5 years ago.
that is what i ask for, the part i mean

I was asking which side of the dash was blowing hot... the left or the right side?

Customer: replied 5 years ago.
Left side


There are several actuators in the dash however your left side has failed, should be replaced, and is likely the noise as well. Remove the screws from the right side under dash hush panel if your truck has one. The actuator is on the bottom near the center of the hvac case. There are two 5.5mm screws that hold it on. You can also put your hand on the actuator when the noise is present and feel if that is the actuator making the noise.





Bill and 8 other Chevy Specialists are ready to help you
Customer: replied 5 years ago.

Hopefully it was the same actuator making the noise as causing the hot air on the drivers side.





Customer: replied 5 years ago.
Do I have remove dash
For the left side? No, just the hush panel and the actuator as in the pictures above.