Truck making new sound

[Drogers30]

Hello! I drive a 1995 GMC Sierra 1500 5.7L V8. It has started making a worrisome sound. The video I have of the truck making the sound is too large to upload to this site. So I have provided a link to the video a I uploaded to YouTube. This all started a couple of weeks ago. I had driven the truck for about 7-10 miles round trip on a hot day, averaging approximately 50mph. The next day it was making this sound whenever a I started it up. As you can hear on the video, the sound comes and goes consistently. It does not seem to affect the driving and it doesn’t overheat, but it is definitely enough to worry me. Any ideas about what could be causing it. Any help would be greatly appreciated.

 

 

[pmt314]

Check the a/c compressor yet?

[Drogers30]

I have not checked that yet. I will take a look at it. Thanks! 

[Formulabruce]

Why is a '95  1/2 TON truck post in this section??

 

 " By Drogers30, 4 hours ago in 2000-2014 Silverado & Sierra HD "

[Drogers30]

Haha sorry! It was the best section I could find for my truck. I didn’t see a 95 Sierra section. I will gladly post this under another section if you know of one that is more appropriate.