I just finished adding turn signal mirrors to my '04 Ascender and noticed that the driver's side glass was slightly yellow, similar to a Yukon SLT/Denali with burnt out auto dimming side mirrors. I removed the yellowed glass so I could replace it with the original one from my stock mirrors and found a 2 pin plastic connector in addition to the wires for the heating element. I know there were a few features that were removed after 2002 but I've never heard of these trucks having this. Does anyone with an early Trailblazer LTZ or Envoy SLT have this feature? The manufacturing date on the mirrors is mid 2002 and they came off of an '03 Envoy.