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I have a 2010 2.2L and when I drive on the highway I begin to feel a vibration at about 80-90km/hr. It's hard to explain but it kind of vibrates three time, pause for a second, vibrates three times, pause for a...
I live in St. John's, NL, Canada. I'm on CSS.net and Yourcobalt so I figured I may as well join this one as well!
I drive a 2010 2.2L Cobalt LS, that's not heavily modded yet, but slowly, modifications are happening. You can see them in my sig.