Unfortunately, my 04 Chevy Silverado 2500hd LS 6.0 the Passenger side AC vent Blend Door actuator required me to remove the dash to gain access to the Passenger Side Blend Door actuator. The forum has been very kind to me so I wanted to make sure I closed out this repair job for others to hopefully learn from like I did. So here it goes - I took apart the dash, see google search to see how to do it. Then after removing all the screws that held the dash in place, air bag disconnect, brackets, sterio antenna wire, and etc I used a pry bar to get under the vent on the right side, be very careful not to overdue it, you can gain about a 1/2 inch of additional clearance, then I unplugged the actuator. I was going to cut the vent to gain access but decided not to go that route. Just FYI the Blend door actuator for the drivers side is just above the hump and can be gotten to a lot easier, the re-circulating blend door is on the right top side and you can see it after you disassemble the dash and glove box. I was able to gain access to the Passenger side blend door actuator and removed the one screw on the right, You have to torque your hands and fingers to get to it with a 6mm wrench.The other screw on the left is a major bear to get access to with a regular 6mm socket. You just dont have room to navigate and clearance. So, I went to Orileys and purchased a 1/4 indrive Ratchet, lenght 3 1/2 long and attached my 6mm socket and had enough clearence to get the screw on the left out. I had already got the screw on the right out with a lot of patience, but would use the 1/4 inch Rachet with the 6mm socket to re-install the new actuator. My truck looks like someone just gutted it with everything disconnected and removed. I believe if I had taken it to the Dealership the cost to do this job I would imagine be in the ball park of $1,500.00 to $2,000.00 if not more, just guessing. I understand now why it would cost that much (Book Hours) labor costs. Only advice I can give is to be patient and take your time or you could break some of the plastic clips, of course I broke one but will not even know it once I put it back together. Good luck to anyone doing this job. I broke it up in two days given it is just way to hot here in Texas (103)F, so it was an early AM job for me because I did not have garage access. Thanks to all the helped me. Keith