This has been talked about before but:
I just did the 3/8 vinyl tubeing method today. What a difference.
Got 2, 20ft rolls of clear vinyl tubeing. 'bout $15.00 OTD, at Home Depot.
Took'm off the truck, laid'm flat on the garage floor, ran a Fishtape thru'm. Pulled each roll thru a wet sponge with lots of Dawn dish soap poored on the sponge, hooked'm to the fish tape, pulled'm back thru the door seals, re-installed'm back on the truck..... Done Deal.
Whole thing took about an hour or so.
Made a BIG dif in the noise level in the cab. I never thought my truck was THAT noisey inside, but this little trick makes a noticeable difference.
JOE