97K1500Silverado
I'm Awesome
- Joined
- Aug 20, 2014
- Messages
- 117
- Reaction score
- 80
GMT400’s are famous for the blend doors getting stuck. My 97 has most of the air trapped in the dash. Especially when settings is on the upper person (all the way to the left).
Try changing your air setting to floor or defrost and see if the air comes out full force vs the dash setting.
If I hit a decent bump occasionally I will hear a light clunk and all of the sudden my dash air vents blow full force. I can tell when it’s not full force because the air won’t even reach the front seat backs. When it’s working properly you will feel air move well past the front seat backs.
I’ve been twisted into a pretzel with my hand up through the middle floor exit and have pulled the entire middle blend door out. The rubber seals were Disintegrated but the motor actuator by the accelerator pedal is working correctly.
Problem is when you turn truck or blower off all the blend doors move to the heater floor setting. So if you are lucky to get it at full force, next time you start truck or turn blower on it will probably get stuck again.
If you figure out a solution let me know!
Try changing your air setting to floor or defrost and see if the air comes out full force vs the dash setting.
If I hit a decent bump occasionally I will hear a light clunk and all of the sudden my dash air vents blow full force. I can tell when it’s not full force because the air won’t even reach the front seat backs. When it’s working properly you will feel air move well past the front seat backs.
I’ve been twisted into a pretzel with my hand up through the middle floor exit and have pulled the entire middle blend door out. The rubber seals were Disintegrated but the motor actuator by the accelerator pedal is working correctly.
Problem is when you turn truck or blower off all the blend doors move to the heater floor setting. So if you are lucky to get it at full force, next time you start truck or turn blower on it will probably get stuck again.
If you figure out a solution let me know!