What the heck is this sound?

[glennf1]

Make sure you get the updated header bolts from GM when you change them.

[ryaleon]

I've got this sound as well.

[ryaleon]

Actually just checked mine. Drivers side rear bolt on manifold was indeed loose. And it will not tighten. Looks like it's broken. Sigh

[SMITH23H2SUT]

Originally Posted by ryaleon

Actually just checked mine. Drivers side rear bolt on manifold was indeed loose. And it will not tighten. Looks like it's broken. Sigh

Ditto.Now I have an excuse to have my entire exhaust upgraded.Headers on back. Just have to find someone to do the work.

[jsbihn]

I swear I must be jinx'ed
Seems like the minute someone on this forum has an issue, my truck gets it too.
Looks like I have a leak too. UGH!!!
If I didnt love this truck