Exhaust Leak Gmt 900

[Trav_13]

Have any of you guys with GMT900's with the 5.3 experienced an exhaust leak sound? The reason I ask is that my 09 which has 9K on it now, has done it since about 1K miles....it is a slight ticking which seems to be coming from either the exhaust manifold, or maybe even what I call the exhaust donut between the Exhaust Manifold and the Y-Pipe...it is audiable under a light load and ticking which seems to be underneath my feet....wanted to get your guys input, or see if there was any TSB's out there on this.

[Kblaze94]

Mine and my buddys 09's do it, he took his in and they said it was normal if I remember right, in other words they didnt fix it

[SCHSIERRA]

Mine does it. Sometimes when I start the truck it's pretty loud but gets better after a few seconds when the manifolds get hot. It has to be the manifolds or the y-pipes. I installed a cat-back and it didn't fix it.

[C. Charles Hahn]

Never noticed it with mine....

[4x4chevymatt]

installed a cat back system on mine the other day.....the joint behind the cat seems kind of "micky mouse"...if i had to guess i'd say its leaking around that clamp.

[BigBlueLB756]

That's where mine leaks. And if you've installed an aftermarket cat-back, that clamp may warp the muffler pipe if you tighten it too much without checking the fit as you tighten the clamp.