Frequently bought together
Description
Speaker brackets for the back of a 1973–1987 Chevrolet or GMC C10 cab. They are formed, laser cut and bead rolled to sit against the back wall, so you can add speakers without building your own mounts.
Features
- Laser cut from 18 gauge steel.
- Bead rolled or smooth options are available.
- Two speaker size options: 6.5" or 6"x9".
- All required mounting hardware is included.
- Sold as a set of two brackets.
Fitment notes
See the images for the dimensions of the speaker openings and check them against the speakers you plan to run. Test fit the speakers in the openings, and test fit the brackets in the truck, before final assembly.
See the rest of our GM and Chevy truck replacement body panels.
Not included
- The speakers, the wiring and any grilles. Mounting hardware is included and they are sold as a set of two.
- Check the speaker opening dimensions in the images against the speakers you plan to run, and test fit both before final assembly.
Truck compatibility and specs
Fits these trucks
1973–1987
Not sure this is the right part for your truck? Send us your year, make and model and we will confirm the fit before you order.
Specifications
- Part number
- 7387SB
- Material
- Aluminum Sheet Metal
- Brand
- LS Fabrication
- Interior / Exterior
- Interior
- Weight
- 3.5 kg
Fits alongside
Most often bought with this part:
Installation
All required mounting hardware is included, and the brackets are made to be installed by a do-it-yourselfer.
Test fit the speakers in the openings and the brackets in the cab before you commit to the install.
Reviews
Customer reviews
What owners are saying
7

Common questions
What speaker sizes do they take?
The brackets are offered in a 6.5" and a 6"x9" opening. The opening dimensions are in the product photos - measure your speakers against them and test fit the speakers in the openings, and the brackets in the truck, before final assembly.
Is the mounting hardware included?
Yes, all the required mounting hardware comes with them, and they are sold as a set of two.
Will they fit a big back window cab?
The 55-59 brackets are currently cut for the small back window cab only; the big window cab is a different shape and we do not have a version for it yet. On 47-54 cabs, 1947-1948 may need modification, and the brackets will not work alongside the factory in-cab gas tank.
How do I know it fits my truck?
This part is listed for 1973–1987 Chevy and GMC Blazer, C10, C20, C30, Jimmy, K10 and others. The full year, make and model list is in the Truck Compatibility tab on this page. If your truck has been modified, or you are between two of the year ranges we list, send us the year, make and model and we will confirm the fit before you order rather than after.
How long before it ships?
It is a stock item and leaves our warehouse in 1-3 business days. Transit after that is typically 2-5 business days in the United States. Larger orders can arrive in more than one box on different days.
What if it is not right for the truck?
You have 30 days from delivery to return it by mail. Return shipping is on you, and the part needs to come back uninstalled and unmodified - once a panel has been trimmed or welded it cannot go back. Made-to-order items are final sale. The full terms are on our returns page.
Question that is not answered here? Send us your year, make and model at info@lsfab.com and we will answer it before you order.


































thank you
Fit perfect ,well made ,thick sheet metal, this company makes quality stuff.
Fit perfect in 1990 R3500 squarebody crew cab. I applied Kilmat to the back of the brackets and the mounting tabs. Worked well with Kicker 6.5’s
Great fit !!!!