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Old 07-12-2018, 05:23 PM
94GMC2500 94GMC2500 is offline
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Question Clicking noise from radio,,

Got a 95 Silverado with the AM FM CD and Cassette radio, it makes a clicking noise when I turn the key off. Some times it clicks a couple clicks and some times it clicks for like 5 seconds and then stops.

I am 99% sure its not from a actuator on the AC/heater. These controls all work. It will click just by turning the key to acc and back off so none of the AC/heater stuff is doing anything.


I think it has to do with the CD player but the CD player works fine. I have a short video of the noise but don't know if I can post it.


Has anyone else had this happen?
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1995 K3500 Silverado extended cab dually auto trans. Diamond Eye exhaust, KOJO chip, manual boost control, HD cooling, PMD behind bumper, modified fan clutch.
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Old 07-13-2018, 08:14 AM
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a5150nut a5150nut is offline
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do you have any CD's loaded in that it is parking when you turn the key off?
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Old 07-13-2018, 08:44 AM
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I know my girlfriend's Jeep does something with the CD player after turning the vehicle off. It's actually a minute or two later. I only heard it because I turned the car off and then waited for her to run in to a store. It sounds like it is "parking" the CD or something and makes a few clicks and whirs.
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Old 07-13-2018, 10:21 AM
94GMC2500 94GMC2500 is offline
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I don't have a CD in it. Could be the noise is from CD player, Hard to tell exactly where its coming from. The CD player works though.

It sounds to me like a little plastic gear skipping when I turn the key off. Everything works but its just a little annoying.
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Old 07-14-2018, 06:11 PM
56pan 56pan is online now
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I think it's your recirc. door actuator. That actuator does not provide position feed back to the HVAC cont. panel like the other two actuators. The other two have position feedback and will run to the commanded position. The recirc. door actuator is commanded to run to the stop with a 10 second time delay by the cont. panel when you turn off the truck. I can't rmember if it's commanded to run to open or closed. Has plastic gears and they get old and brittle. Once that happens, one of the teeth will usually break off and cause it to pop over the adjacent tooth until the 10 sec. time delay runs out. On my '93 C2500 I replaced the bad one when I removed the dash to replace a leaking a/c evaporator coil. In my opinion, it's impossible to change without removing the dash. If anyone has ever replaced one with the dash installed, I'd sure like to hear how they did it. Hope this helps.
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Old 07-14-2018, 08:39 PM
94GMC2500 94GMC2500 is offline
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How many actuators are on a 95? I found 3, one by fan motor, one by gas pedal, and one sort of behind the radio/ash tray.


I think its the CD player making noise.
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Old 07-15-2018, 03:25 AM
56pan 56pan is online now
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Tried to attach an image file. The recirc. actuator is item 65 and is called the "mode" actuator on the file. File only shows 2 of the actuators. I'm not going out to the garage to get my wiring diagrams, but you could look up the fuse that feeds the actuator and pull it, then start the truck, shut it down and see if the clicking is still there. If it is, it's the CD player. That picture is for my '93 and I am assuming the configuration is the same for the '95. Only assuming. Bound to be somebody on this forum that knows.
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Old 07-15-2018, 03:33 AM
56pan 56pan is online now
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Quote:
Originally Posted by 56pan View Post
Tried to attach an image file. The recirc. actuator is item 65 and is called the "mode" actuator on the file. File only shows 2 of the actuators. I'm not going out to the garage to get my wiring diagrams, but you could look up the fuse that feeds the actuator and pull it, then start the truck, shut it down and see if the clicking is still there. If it is, it's the CD player. That picture is for my '93 and I am assuming the configuration is the same for the '95. Only assuming. Bound to be somebody on this forum that knows.
File was too big and not allowed. Maybe the dropbox link will work.

https://www.dropbox.com/s/6p78xks4bp...uator.jpg?dl=0
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Old 07-24-2018, 07:25 PM
56pan 56pan is online now
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Just curious, 94GMC 2500, if you ever got this sorted out? And what was it causing the noise?
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Old 07-25-2018, 06:04 AM
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The factory radio/cd player looses all power when the ign key is shut off.

Likely the recirc door up near the firewall on the lower side of the heater box.

As mentioned these fail and will sit and click..click...click

Turn the recirc to outside air for the winter and or inside for the hot weather (if the ac works.

UNPLUG THE LITTLE CONNECTOR ON THE SERVO AND THE NOISE WILL STOP.

The only way to fix these is is remove the dash, the HVAC BOX and then change the servo.

Terrible design burying that servo where they did...


Good luck
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