Vibration from ladder-type skid plate.

[finall]

I am getting a weird vibration which transfers through the whole body while driving. Removed the tightly attached ladder-type skid plate that is called a "catalytic converter guard" by GM.

Vibration gone and H2 is very smooth at all engine speeds. Put it back, and vibration returns.

Has anyone found a way to isolate this skid plate so that it does not vibrate the body? Maybe with some type of rubber insulators?

What the hell is wrong with this thing? It is tight on the frame (torqued to 45ftlb). I did not realize how much vibration it was adding to the vehicle until I took it off.

The reason this came up is that it was originally bent against the exhaust crossover pipe and causing tons of vibration when I bought the used 07 H2. Dealer straightened it out to clear the exhaust by 1/2", & tightened it up. This markedly reduced the vibration, but there is still enough there to make driving with it noticeably more noisy than without.

Anyone find a solution? I would like to keep the OEM (wimpy) protector instead of replacing it with something more costly.