Looking at your muffler outlets, it appears the main exit is on the left and your muffler doesn't have a weep hole?

 

what’s a weep hole?

 

I’ll try to clean that tomorrow it’s storming today

 

 

Oh ya I didn’t see that. Should I drill a tiny hole ?

 

My '07 OEM factory installed muffler has a weep hole, & still solid(no exhaust leaks) after 16+yrs!

 

mine is not oem it’s magna flow dual exhaust system, do you recommend drilling a tiny hole ?

 

how do I clean those I just looked at them they are like part of the valve cover I can’t take them off and clean them so how to clean them?

 

I blew compressed air in the hole . The one of the left seem open and clear cus when I blow air when I stop air come back up and the other one was very clean but I blew air in it anyway as well. It’s been storming here so when I get a chance I’ll go under the car and check more for any oil residue because I still don’t know why my hummer eat oil. No oil burn residue from exhaust, no oil residue behind the engine or around it , I cleaned the pcv, the last step would be to check under again to see any residue but if I can’t find anything then I don’t know what else I should look for ?

 

Maybe your piston oil control rings are stuck and you are burning oil thru the engine.