I just talked to a service manager at one of our large GMC dealers here in town and gave him some tsb numbers to check on issues I am having with our 07 Yukon and he tells me they are invalid numbers for my Yukon. Was wondering if anybody can verify these are correct or not?

TSB PIC3764N for remotes failing to work (he said this does not even look like a tsb #)
TSB 06-08-49-007A rattling front dash trim piece
TSB 06-08-66-012B whistling air noise from rear hatch window when towing a trailer

Thanks