Blazer Speaker mounting problems
 

Ok I just got a under dash speaker .The problem is the mounting holes interfer with the A/C controller .what do I do????????????

Re: Blazer Speaker mounting problems
 

Dont you just take out the two screws that mount your control panel, and remount the speaker bracket using the same two screws. Dont have ac, but that is the way it works with the heater control panel

Got pics?

Re: Blazer Speaker mounting problems
 

The ac controller has mounting brackets that get in the way also here is some tidbit of Info

Blazer and Jimmy Speakers
One of the most unusual features of the 1967-1972 series of trucks is the unique placement of the 1969-1972 Chevrolet Blazer and GMC Jimmy radio speaker. Unlike the pickup, Suburban, and large trucks; the radio speaker is not under the top of the dash. In fact, the dash does not even have grille slots to allow sound to come from a speaker.

Because of the Blazer and Jimmy's removable top, GM knew that some would occasionally be caught in the rain. This would quickly ruin a speaker that was in the traditional location. Thus, on the 1969-1972 Blazer and Jimmy only, the factory radio speaker is in the right side interior quarter upholstery panel behind the front seat. If the vehicle did not come with interior rear panels, the speaker was out of sight at the bottom edge of the dash.

Re: Blazer Speaker mounting problems
 

I guess now I need to cut into the panel????????? and find a pic of that to see what it looks like???????

Re: Blazer Speaker mounting problems
 

i had a 72 with ac and it had the speaker bolted with the ac controller dont have that truck any more so i cannot help with details

Re: Blazer Speaker mounting problems
 

My blazer came with the speaker mounted in the dash. It is non AC though.

Re: Blazer Speaker mounting problems
 

I have AC and the speaker bolted up under the dash but on the outside. I assume that is how it was supposed to install as I couldn't get it to work inbetween the dash and AC/heat control.
http://i249.photobucket.com/albums/g...n/CIMG3350.jpg

Re: Blazer Speaker mounting problems
 

Here's where the General mounted the one in my '71.

Attachment 917960

Re: Blazer Speaker mounting problems
 

2003 or rsavage

Where did you get the under dash speaker and (for rsavage) how does it sound?
Posted via Mobile Device
Posted via Mobile Device

Re: Blazer Speaker mounting problems
 

I ordered mine with A/C and AM, and that's the way they mounted them in St. Louis. (where it was assembled) In the 72's anyway.

Re: Blazer Speaker mounting problems
 

I tryed it between the ac-dash would not work.......tryed to mount the way everyone is talking about ,BUT the bracket on the speaker is treaded and are not as flat as rsavage

Re: Blazer Speaker mounting problems
 

Dmcinfo,
I bought it off the board. They come along once in a blue moon. As for sound, I couldn't tell you as it isn't working. I will probably have to send it for repair. I am almost positive the radio is good but I am loathe to get into it right now. Removing a radio in an ac truck is a pain so before I pull it out I am going to make sure that it is the speaker that isn't functioning. Probably a next winter project as I want to drive the Blazer now.

Re: Blazer Speaker mounting problems
 

I just picked mine up from a member- oldschool it doesnt work but thats fine, I went for the look

Re: Blazer Speaker mounting problems
 

[QUOTE=
....Thus, on the 1969-1972 Blazer and Jimmy only, the factory radio speaker is in the right side interior quarter upholstery panel behind the front seat. If the vehicle did not come with interior rear panels, the speaker was out of sight at the bottom edge of the dash.[/QUOTE]

I assume this is a quote from some litereature? My Cheyanne package Jimmy didnt have any speaker in the rear upholstery panel. I dont think Ive ever seen a 'factory' speaker there... anyone else seen one??

Re: Blazer Speaker mounting problems
 

heres a link I found this
http://www.oldchevytrucks.com/blog/i...hp/tag/blazer/

Re: Blazer Speaker mounting problems
 

I was hoping that old man jimmy would chime in here.... I knew he would be the guy to ask!

Re: Blazer Speaker mounting problems
 

My 72 CST Blazer with AM/FM radio had and still has (have not taken it out yet) the original speaker under the dash w/speaker holes in the dash. In the picture it is in the upper left corner, picture is from the glove box as I was pulling the A/C.

http://i301.photobucket.com/albums/n...T/IMG_0028.jpg

Looked but I don't have a pic of the top of the dash.

Re: Blazer Speaker mounting problems
 

If the speaker was placed in the right side panel on trucks with side panels then the survivors with radios would have holes in them. I have a set of originals I bought from a board member and the right side doesn't have a speaker hole. I haven't seen a speaker installed in that way from the factory. I don't think that the blog post can be counted upon as reliable. It refers to the Blazer as having a 107" wheelbase when the diagram below shows the correct 104". Further, it appears that the brackets on the speaker shown have been bent to 90 degrees?

Re: Blazer Speaker mounting problems
 

Ok back to the org problem and I guess I should have posted pics. I think maybe the brackets are wrong????? they are threaded

Re: Blazer Speaker mounting problems
 

Dont think they should be threaded, got pics of the bracket?

Re: Blazer Speaker mounting problems
 

Man that was quick:lol:


That nut shouldnt be welded on there, dont know what application it would be for.....

Maybe dual speakers, across the lower dash

Re: Blazer Speaker mounting problems
 

I believe mine were threaded also (had nuts welded on them). I ground them off and redrilled so AC/heat control screws would go through. Any of the photos I found had it in the center, but perhaps the correct install is as 1949GMC pictures as the threaded nuts would be used. I am going to check my assembly and chassis manuals to see if I can come up with a GM picture.

Re: Blazer Speaker mounting problems
 

Same place I have my stock speaker mounted. Those welded nuts would come in handy in this location as I believe there are only holes in the dash lip.

Re: Blazer Speaker mounting problems
 

didnt you get any instructions when you bought that speaker

Re: Blazer Speaker mounting problems
 

Brackets aren't wrong... that's how it's supposed to be.

Attachment 918333

Re: Blazer Speaker mounting problems
 

Thanks.. they came mounted in the middle hanging under the dash. Problem was, at highway speeds, their were so much wind noise and rattles you couldn't hear it very well.

Re: Blazer Speaker mounting problems
 

1949 that is what I have exactly. Old school your funny

Re: Blazer Speaker mounting problems
 

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

Re: Blazer Speaker mounting problems
 

Pete I brought something back to the top for you Stock speaker

Re: Blazer Speaker mounting problems
 

I was just working on installing a speaker in my restoration. I started out trying to install the nut style bracket with not much success. I was trying to get it under the ac controls but it looks like it would only work to install it offset by the gas pedal.
I decided to check my stock and found another bracket speaker setup with a different shape and the nuts omitted. I tried it and it fits perfect under the ac but it needs to be mounted on the outer surface of the dash

Re: Blazer Speaker mounting problems
 

Another note for the super purists. The back side of the bracket isn’t painted, just zinc plated.

Re: Blazer Speaker mounting problems
 

Installed

Re: Blazer Speaker mounting problems
 

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.

Re: Blazer Speaker mounting problems
 

This is an old thread that I responded to some years ago. I have to start looking at the dates :)

Re: Blazer Speaker mounting problems
 

Good info thanks for posting.

Re: Blazer Speaker mounting problems
 

Here’s another example. Looks original

Re: Blazer Speaker mounting problems
 

See post #8. That is the original mounting position. The brackets on the example you are showing have been flipped. The welded nut goes over the bottom lip so that the machine screws screw up into them and it was offset towards the driver's side.

Re: Blazer Speaker mounting problems
 

It’s the case that are two styles of brackets. One seemingly earlier style was mounted in an offset manner toward the driver and these brackets had a threaded nut. At some point, GM began mounting them below the AC/heater control: these brackets do not have a threaded nut. The brackets are the same otherwise - I’ve had both in my possession.

Here is a survivor 72 St Louis Highlander that was owned by member SoCoC10

Re: Blazer Speaker mounting problems
 

Here’s another example of the earlier style location - I think this was in a 69 blazer (wasn’t a 72)

These speakers were only used in double wall top blazers

Re: Blazer Speaker mounting problems
 

So it looks like there are 3 different styles of brackets. The ones with the nuts are for offset and there are two different angles for the centered brackets