So I love the style of the older unit. HVAC Control Head with Defrost Auto Control 2003- 2004 I was wondering if anyone has done this yet. Ive seen the back of both of them and the one connector looks the same but the other one is different. Any info would be greatly appreciated. Here is what I currently have.03 - 09 CHEVY TRAIL BLAZER ENVOY A/C HEATER CONTROL - eBay (item 160512159428 end time Dec-27-10 20:17:46 PST) Thanks!