Door Deadening / 'First Gen CTS

measure, cut apply. get as much as you can inside the door panel too esp behind the speaker

I used ABS plastic sheets screwed on top of those door parts so I could access later if need be and just siliconed to seal around them.Rest i Matted the entire doors and placed on back of inside door panel also, help deaden the door .I used a heat gun and rolled on to make a good adhere process.Just enough make it sticky not to melt.Approx 3-4 layers on my truck 2 layers on inside door panel. cut small sheets so easier to place and work with.You can find 1/8"-1/4" ABS sheets shipped off Ebay

Be sure to clean your doors pretty good before applying any Matt. Alcohol is cheap and works very well. Drys pretty quick also.