trip,
ramp code =bottom right of sticker, big block letters on the original sticker
refer to the link in post #3 above. i've said this before, please read...if you're looking at your reproduction and you did not specify the ramp code, Bill did not put one on the sticker for you.
ladybug picnic, i contacted a few GM dealers by me and no luck. they say their database for recall information only goes back maybe 10 years. VINs HPxxxxxx come up as not a good VIN. So it looks like the only service records available are within the past 8-10 years or so. Similar to what I posted before regarding dealers only keeping records for about 7 years per IRS audit standards.