EGR Valve

[bruce69camaro]

My truck is a 2000 Sierra, 5.3 lit.

 

I'm hearing a "clicking" noise coming from the passenger side, front area.

 

It seems to happen every 10-12 seconds.

 

The engine light is not on and it runs fine.

 

Can someone tell me what the signs are of an EGR valve going out?

 

Thanks

[00Silverado4x4]

Is this while driving or at idle while looking under the hood? Could you get a sound clip or video?

[bruce69camaro]

This is happening while the motor is running. If it's at an idle, the sound is very quiet, but while driving down the road, it is louder.

 

I just talked to two friends and they both think it's the AC compressor. The one thinks it may just be low on Freon.

He told me to turn off the heater controls, no defrost, not heat, nothing and if I hear nothing, then turn the heater controls on and if it happens, then it's the AC compressor.

 

He said with the EGR valve, the engine light would be on and it isn't.