Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi, I'm Cam. May I ask your first name? I am working to get you a fast accurate answer. About your vehicle, What is the VIN please?
Attachments are only available to registered users.
This bulletin is being revised to update model years/models, add RPOs and a pinging condition. Please discard Corporate Bulletin Number 07-06-05-001F (Section 06 - Engine/Propulsion System).
Some customers may comment on a pinging/popping/snapping noise from underneath the vehicle at idle or immediately after the vehicle is shut off. Pinging/popping/snapping noise from the exhaust system during cool down is a normal condition. The noise may be intermittent depending on the outside temperature and or temperature of the exhaust system at the time of testing.
Some customers may also comment on a buzz noise coming from the muffler during vehicle operation.
As the exhaust system cools, the muffler shell and muffler internals contract at different rates. Pinging/popping/snapping noise from the exhaust system during cool down is a normal condition.
If the muffler heat shield straps are loose, the heat shield may be free to buzz.
DO NOT REPLACE THE EXHAUST SYSTEM COMPONENTS.
This condition is normal to the muffler design and does not indicate poor quality or part failure.
Confirm the origin of the buzz by shimming (use metal shims) the straps tight and rerunning the vehicle. If the buzz concern is gone, then it is caused by the loose shield. Using the following procedure, install new straps to secure the heat shield to the muffler.
Tighten Tighten the strap screw to 4 N·m (35 lb in).
Strap, Exhaust Muffler Heat Shield
If we are indeed talking about the exhaust, then yes.
Installing straps should reduce it.