Your best bet is to go straight to the horse's mouth for your information. Tom lists his number as (586)739-9601.....write your question(s) down just the way you want to ask and be sure the battery in your phone is fully charged. He's got a lot of info stored in his brain and if it relates to the Chevy truck he can answer it.
Tom and his wife are basically a 2 person operation...."no press 1 for English".....email contacts are not as productive as a phone call. Give him a call.....you'll be glad you did!
Dave