[BlazerLT]

Originally Posted by Cailen

I'm working on burping it already... Added some fluid to the rad when I started her up this morning. There's a LOT of air in the system. When I took her for a test drive last night after I finished the needle would drop 50 or 60 degrees and then pop back up.

Thanks for the suggestion on the blending door, I'll check that.

Oh my, that is a lot of air still left.

Turn your heat to full hot and elevate the front of the truck on ramps and allow it to heat up until the stat opens and the level will drop as the air is displaced.