The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1969 - 1972 Blazers and Jimmys Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-02-2012, 10:00 PM   #26
old man jimmy
Registered User
 
Join Date: May 2007
Location: texas
Posts: 329
Re: Blazer Speaker mounting problems

Quote:
Originally Posted by 1949gmc View Post
I was hoping that old man jimmy would chime in here.... I knew he would be the guy to ask!
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.
old man jimmy is offline   Reply With Quote
Old 05-03-2012, 06:22 AM   #27
2003 silverado
Registered User
 
2003 silverado's Avatar
 
Join Date: Apr 2010
Location: West Chester Pa
Posts: 965
Re: Blazer Speaker mounting problems

1949 that is what I have exactly. Old school your funny
__________________
!972 K5 Blazer,Highlander,A/C a twin to the one I Had
1972 K/5 Blazer CST Highlander 15YR project
2003 Silverado Crew 2500HD (Daily driver)
1997 Ford focus (Beater)
2003 ford Taurus (student)
2014 Ford Fusion HYB (wife)
2003 Jetta ( Student)
2003 silverado is offline   Reply With Quote
Old 07-28-2013, 01:16 PM   #28
DeadheadNM
Carpe manana


 
DeadheadNM's Avatar
 
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 8,670
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
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547
1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308

Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, AASmedic, SoCoC10, Lumaestas, carbuff382
DeadheadNM is offline   Reply With Quote
Old 07-28-2013, 06:48 PM   #29
2003 silverado
Registered User
 
2003 silverado's Avatar
 
Join Date: Apr 2010
Location: West Chester Pa
Posts: 965
Re: Blazer Speaker mounting problems

Pete I brought something back to the top for you Stock speaker
__________________
!972 K5 Blazer,Highlander,A/C a twin to the one I Had
1972 K/5 Blazer CST Highlander 15YR project
2003 Silverado Crew 2500HD (Daily driver)
1997 Ford focus (Beater)
2003 ford Taurus (student)
2014 Ford Fusion HYB (wife)
2003 Jetta ( Student)
2003 silverado is offline   Reply With Quote
Old 12-18-2018, 09:34 PM   #30
69-72
Registered User
 
69-72's Avatar
 
Join Date: May 2008
Location: 204
Posts: 902
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
Attached Images
  
__________________
1969 Chevy Custom Camper 3/4 ton Rust free survivor

1972 Chevy Blazer CST 4x4 Almost Rust free survivor

1972 GMC Jimmy 2wd Undergoing surgery
69-72 is offline   Reply With Quote
Old 12-18-2018, 09:36 PM   #31
69-72
Registered User
 
69-72's Avatar
 
Join Date: May 2008
Location: 204
Posts: 902
Re: Blazer Speaker mounting problems

Another note for the super purists. The back side of the bracket isnít painted, just zinc plated.
Attached Images
  
__________________
1969 Chevy Custom Camper 3/4 ton Rust free survivor

1972 Chevy Blazer CST 4x4 Almost Rust free survivor

1972 GMC Jimmy 2wd Undergoing surgery
69-72 is offline   Reply With Quote
Old 12-19-2018, 09:16 PM   #32
69-72
Registered User
 
69-72's Avatar
 
Join Date: May 2008
Location: 204
Posts: 902
Re: Blazer Speaker mounting problems

Installed
Attached Images
 
__________________
1969 Chevy Custom Camper 3/4 ton Rust free survivor

1972 Chevy Blazer CST 4x4 Almost Rust free survivor

1972 GMC Jimmy 2wd Undergoing surgery
69-72 is offline   Reply With Quote
Old 12-19-2018, 09:43 PM   #33
rsavage
Senior Member
 
rsavage's Avatar
 
Join Date: Aug 2009
Location: Alden NY
Posts: 2,466
Re: Blazer Speaker mounting problems

Quote:
Originally Posted by DeadheadNM View Post
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.
Attached Images
 
__________________
1961 C1 Corvette
69 Blazer 4 WD. Latest restoration project
2018 Durango 392 Hemi SRT
rsavage is offline   Reply With Quote
Old 12-19-2018, 09:44 PM   #34
rsavage
Senior Member
 
rsavage's Avatar
 
Join Date: Aug 2009
Location: Alden NY
Posts: 2,466
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
__________________
1961 C1 Corvette
69 Blazer 4 WD. Latest restoration project
2018 Durango 392 Hemi SRT
rsavage is offline   Reply With Quote
Old 12-21-2018, 08:04 PM   #35
DeadheadNM
Carpe manana


 
DeadheadNM's Avatar
 
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 8,670
Re: Blazer Speaker mounting problems

Good info thanks for posting.
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547
1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308

Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, AASmedic, SoCoC10, Lumaestas, carbuff382
DeadheadNM is offline   Reply With Quote
Old 01-26-2019, 08:25 AM   #36
69-72
Registered User
 
69-72's Avatar
 
Join Date: May 2008
Location: 204
Posts: 902
Re: Blazer Speaker mounting problems

Hereís another example. Looks original
Attached Images
 
__________________
1969 Chevy Custom Camper 3/4 ton Rust free survivor

1972 Chevy Blazer CST 4x4 Almost Rust free survivor

1972 GMC Jimmy 2wd Undergoing surgery
69-72 is offline   Reply With Quote
Old 01-26-2019, 10:52 AM   #37
rsavage
Senior Member
 
rsavage's Avatar
 
Join Date: Aug 2009
Location: Alden NY
Posts: 2,466
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.
__________________
1961 C1 Corvette
69 Blazer 4 WD. Latest restoration project
2018 Durango 392 Hemi SRT
rsavage is offline   Reply With Quote
Old 01-26-2019, 03:04 PM   #38
DeadheadNM
Carpe manana


 
DeadheadNM's Avatar
 
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 8,670
Re: Blazer Speaker mounting problems

Itís 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 - Iíve had both in my possession.

Here is a survivor 72 St Louis Highlander that was owned by member SoCoC10
Attached Images
 
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547
1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308

Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, AASmedic, SoCoC10, Lumaestas, carbuff382
DeadheadNM is offline   Reply With Quote
Old 01-26-2019, 03:06 PM   #39
DeadheadNM
Carpe manana


 
DeadheadNM's Avatar
 
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 8,670
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
Attached Images
 
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547
1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308

Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, AASmedic, SoCoC10, Lumaestas, carbuff382
DeadheadNM is offline   Reply With Quote
Old 01-26-2019, 03:23 PM   #40
69-72
Registered User
 
69-72's Avatar
 
Join Date: May 2008
Location: 204
Posts: 902
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
__________________
1969 Chevy Custom Camper 3/4 ton Rust free survivor

1972 Chevy Blazer CST 4x4 Almost Rust free survivor

1972 GMC Jimmy 2wd Undergoing surgery
69-72 is offline   Reply With Quote
Old 01-26-2019, 05:57 PM   #41
DeadheadNM
Carpe manana


 
DeadheadNM's Avatar
 
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 8,670
Re: Blazer Speaker mounting problems

Quote:
Originally Posted by 69-72 View Post
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
Could be. Maybe some just bent over the years though?
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547
1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308

Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, AASmedic, SoCoC10, Lumaestas, carbuff382
DeadheadNM is offline   Reply With Quote
Old 01-26-2019, 05:59 PM   #42
69-72
Registered User
 
69-72's Avatar
 
Join Date: May 2008
Location: 204
Posts: 902
Re: Blazer Speaker mounting problems

I would think so too but my brackets had the original finish and showed no signs of being bent
__________________
1969 Chevy Custom Camper 3/4 ton Rust free survivor

1972 Chevy Blazer CST 4x4 Almost Rust free survivor

1972 GMC Jimmy 2wd Undergoing surgery
69-72 is offline   Reply With Quote
Old 01-26-2019, 10:31 PM   #43
Classic Bowties
Always on the hunt...
 
Join Date: Sep 2006
Location: Portland, OR.
Posts: 3,958
Re: Blazer Speaker mounting problems

Quote:
Originally Posted by DeadheadNM View Post
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.
with Pete on that above part in bold, we too have had both styles of speaker brackets come in over the years. Here are a few pics of my personal 72 K/5 with the blazer/jimmy specific OE under dash speaker mounted directly under A/C control. Mel
.
Attached Images
   
Classic Bowties is offline   Reply With Quote
Old 03-12-2019, 05:20 PM   #44
Mrcleancar
Registered User
 
Join Date: Feb 2019
Location: Clarkston wa
Posts: 2
Re: Blazer Speaker mounting problems

Please note that you must be a supporting member to post classified items. This includes but is not limited to What Its Worth, Want To Buy, Want To Trade, and For Sale. Please consider supporting the forum by subscribing. Further information on the subscription levels available are located here

If you need any further assistance with that please contact any Admin for help.

Last edited by Liz; 03-12-2019 at 09:39 PM. Reason: edited by staff
Mrcleancar is offline   Reply With Quote
Old 08-12-2019, 10:25 PM   #45
randy500
Senior Member
 
Join Date: Jul 2016
Location: Tacoma, WA
Posts: 5,706
Re: Blazer Speaker mounting problems

This is an old thread but a good one that shows both types of blazer speaker mounting brackets and loactions.
Most brackets are bent, people found the speaker and pulled it down to face them for better sound. Factory they mounted at an angle that matches the lower dash edge angle.
The brackets with the welded nuts mount to the left center under the dash panel with machine screws through the lower dash panel into the speaker bracket.
The brackets without the nuts welded to them mount in the center of the lower dash, the heater control panel screw goes through the speaker bracket then through the dash into the heater control panel securing both the speaker snd the heater control panel.

The brackets do not interchange and are bent almost exactly opposite of each other.

Post 32 shows the speaker bent downward for “more sound”
Post 38 shows the factory mounting angle.
Post 8 shows the left center mount location “brackets with nuts welded” which also appears to show the speaker mounting angle matching the lower dash angle.
Post 19 shows a bent bracket. Someone pulled the speaker down bending the brackets for more sound or so it can be seen hanging under the dash.
randy500 is online now   Reply With Quote
Old 08-12-2019, 11:52 PM   #46
69-72
Registered User
 
69-72's Avatar
 
Join Date: May 2008
Location: 204
Posts: 902
Re: Blazer Speaker mounting problems

Post 32 is mine, the brackets arenít bent. Thatís the way they were made. I have another set of brackets with the exact same bend and they show no sign of being manipulated.
__________________
1969 Chevy Custom Camper 3/4 ton Rust free survivor

1972 Chevy Blazer CST 4x4 Almost Rust free survivor

1972 GMC Jimmy 2wd Undergoing surgery
69-72 is offline   Reply With Quote
Old 08-13-2019, 12:26 AM   #47
randy500
Senior Member
 
Join Date: Jul 2016
Location: Tacoma, WA
Posts: 5,706
Re: Blazer Speaker mounting problems

Quote:
Originally Posted by 69-72 View Post
Post 32 is mine, the brackets arenít bent. Thatís the way they were made. I have another set of brackets with the exact same bend and they show no sign of being manipulated.

In post 31 you have a end view of 2 speakers, both with bent brackets, the foreground picture appears to be a set of brackets with the welded nuts removed, probably so someone could mount it in the center position.
In picture 2 of the same post the brackets are bent too.

Post 38 shows a pristine set of brackets with the speaker in the proper angled position dictated by unmolested brackets.

I suspect the brackets in post 32 were manipulated in a vise or brake but maybe you have the one set of brackets that place the speaker so it hangs straight down.
randy500 is online now   Reply With Quote
Old 08-13-2019, 12:31 AM   #48
69-72
Registered User
 
69-72's Avatar
 
Join Date: May 2008
Location: 204
Posts: 902
Re: Blazer Speaker mounting problems

Quote:
Originally Posted by randy500 View Post
In post 31 you have a end view of 2 speakers, both with bent brackets, the foreground picture appears to be a set of brackets with the welded nuts removed, probably so someone could mount it in the center position.
In picture 2 of the same post the brackets are bent too.

Post 38 shows a pristine set of brackets with the speaker in the proper angled position dictated by unmolested brackets.

I suspect the brackets in post 32 were manipulated in a vise or brake but maybe you have the one set of brackets that place the speaker so it hangs straight down.
I have another set not pictured. Neither set show any signs of being bent original paint. I believe thereís another set in this thread the same as well. It must be one of those mysteries just like how no one knows how it is decided that we even have the hanging speakers or not 😂
__________________
1969 Chevy Custom Camper 3/4 ton Rust free survivor

1972 Chevy Blazer CST 4x4 Almost Rust free survivor

1972 GMC Jimmy 2wd Undergoing surgery
69-72 is offline   Reply With Quote
Old 08-13-2019, 12:35 AM   #49
randy500
Senior Member
 
Join Date: Jul 2016
Location: Tacoma, WA
Posts: 5,706
Re: Blazer Speaker mounting problems

I agree there are some oddballs like blazers with upper dash speakers with the corresponding speaker holes ,just like the trucks have.

Blazer speakers are weird, in general i believe earlier blazers had the left center mount, 72 for sure center mount, some 72 blazers had regular truck dash speaker with the holes for it.
randy500 is online now   Reply With Quote
Old 08-13-2019, 07:27 AM   #50
DeadheadNM
Carpe manana


 
DeadheadNM's Avatar
 
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 8,670
Re: Blazer Speaker mounting problems

I’ve been tracking K5s with and without the pickup style speaker grill atop the dash in this post here related to single wall tops: http://67-72chevytrucks.com/vboard/s...d.php?t=701826

So far it seems only those built at Flint received the pickup style speaker and that switch occurred after the change to a single wall top. Some single wall examples received the older style below dash speaker. The switch to single wall tops then to pickup style in-dash speakers was made during the production run.
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547
1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308

Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, AASmedic, SoCoC10, Lumaestas, carbuff382

Last edited by DeadheadNM; 08-13-2019 at 04:35 PM.
DeadheadNM is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:54 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com