I have a programmer that I purchased for my '06 Silverado and have since traded for a new Tahoe. Since it will not work on the Tahoe I figure I'll try to sell it. I bought it new, still have the original box, paperwork, etc. It is a model 30022. It will work on 2004-2006 Chevy/GM fullsize and Tahoe/Yukon and also Hummer 4.3,4.8.5.3,6.0, and 8.1. If anyone is interested, I will take $250 for it. The only problem is that if you want it shipped, I don't have paypal or anything of that nature, so I don't know what the best method would be. I live in east Tn.