[aaron19922]

Hello all,

I have a 2004 Envoy with about 150,000 miles and it is making this knocking noise from the engine. I have taken the belt off and none of the pulleys are bad. It has been making the noise for years now and it doesn't effect how the truck drives. below is a video of the noise.

 

[Ravalli Surfer]

Listen in the oil cap and under the vehicle. The noise is too metallic to tell with just this one sample.

 

[aaron19922]

Listen in the oil cap and under the vehicle. The noise is too metallic to tell with just this one sample.

I will take a few new videos when I get home from work. The knock can be heard from underneath the truck clearly though.

 

[aaron19922]

Underneath shot

Engine kock rev

 

[Zacharybishop]

Did you ever find anything out with this my car just started making this noise after I ran it low on oil