I have a bone stock 2004 Yukon XL 5.3L and I've noticed an odd cycling intake sound.
When driving on the Interstate at ~70mph, cruise set, and no hills, I hear a cycling burbling sound from the passenger's side of the engine compartment. It sounds like an exhaust burble that gets slightly louder and then slightly more quiet. On the way to work this morning, I noted that it's louder for about 7 seconds and softer for about 15 seconds and continuously cycles this way.
What is this???
When driving on the Interstate at ~70mph, cruise set, and no hills, I hear a cycling burbling sound from the passenger's side of the engine compartment. It sounds like an exhaust burble that gets slightly louder and then slightly more quiet. On the way to work this morning, I noted that it's louder for about 7 seconds and softer for about 15 seconds and continuously cycles this way.
What is this???
