Hey guys, don't know if this is the best place to post it, couldn't think of a more relevant thread to post in. Anyways, my 2000 Blazer LS will only blow air through the front vents, won't blow on the floor or defrost. I've done some research and it tends to point to the blend door actuator, however, I've been getting a mixed response as to exactly where the actuator is. I've heard on the driver side near the firewall, and behind the glove box compartment. Also, if anyone knows, can I get a link or P/N to the actuator? On rockauto it shows two different ones and I'm not sure which is the one I need. Thanks in advance for any help.

 

Probably the vacuum feed to your controls is disconnected or leaking (up under the hood)

ACTUATOR. AIR CONDITIONING (A/C) Vacuum Control. HEATER ASM for 2001 Chevrolet BLAZER. #52489533

 

Check your vacuum lines first.
Later

 

old thread good advice... https://blazerforum.com/forum/2nd-ge...t-17808/page2/