[rsavage]

Originally Posted by DeadheadNM

Now I'm curious. The under dash speaker brackets have coarse threads that match those on the screws that holder a heater to the dash. Easy install if you don't have a factory AC truck. But the screws that secure the AC controller to the dash are finely threaded and don't match the bracket. So, did GM:
1) use separate brackets for AC trucks
2) Drill out the brackets threads
3) Mount the speaker in a slightly different fashion on AC trucks and/or use an additional bracket
4) Do something else and/or I'm just crazy for caring

Can anyone with a factory AC/under dash speaker equipped K5 put this to rest?

Turns out my Blazer has a dash mounted speaker but I may add the under dash speaker I have for the look.

Thanks, Pete

I believe the bracket was originally offset towards the steering wheel. My 71 was an AC blazer and I centered it under the heat/AC controls as it looked much better to mr. Ground off he nuts and drilled the bracket and bent it some to put it more under the dash.