HelloCustomer does the clicking get faster as you increase the fan speed?
Your JA Expert,
It sounds like you have a faulty mode door actuator . If it has failed, the gears would overrun making that noise. Here is a picture of what it looks like, but it will take some dash disassembly to get a view of it.
Remove some of the components from the dash like the glove box to get access and with it clicking, try to see if you can place your hand on the device that is noisy
IT DIDN'T HELP ME. HAD IT HELPED ME I WOULD HAVE ACCEPTED. THE INFORMATION WASN'T HELPFULL AND I SENT MY DAUGHTER BACK HOME. SHE LIVES 3 HOURS AWAY AND TOLD HER TO TAKE TO THE CHEV. DEALER. I KNEW ALREADY WHERE THE CLICK WAS I JUST DIDN'T KNOW WHAT IT WAS.
I WOULD EXPECT THAT YOU WOULD NOT CHARGE MY CREDIT CARD FOR AN ANSWER THAT DID NOT HELP.
No you don't get charged if you don't accept and no problem at all with that. When it's issues that are hard to get to, this makes it a little more difficult to guide you to success. It's not a small task and might have required removing the heaterbox to replace the actuator, which would have been a huge task. That said, you may have made a wise choice before getting yourself into a bigger project that you would have wanted to. Feel free to call upon me again in the future if you need help again. It would be my pleasure to assist.