Rear cross sill question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

atm70chevy · 10-23-2019, 02:32 PM

So I am getting my bed ready for paint and noticed that the mounting brackets have been broken off of my rear cross sill. The bed is already in primer and close to being ready for paint. Are these brackets necessary or I can put it on as is or do I need I need to replace it?

Anthony

**Clatterville trolley** · 10-23-2019, 02:45 PM

Quote:

Originally Posted by atm70chevy

So I am getting my bed ready for paint and noticed that the mounting brackets have been broken off of my rear cross sill. The bed is already in primer and close to being ready for paint. Are these brackets necessary or I can put it on as is or do I need I need to replace it?

Anthony

If this is a wood floor bed you are talking about, I'm not too sure that those aren't reproduced - thinking I have seen them. That's if they are the small brackets spot welded on the inside of the rear cross sill and the back two bolts go through them to hold the back of the bed in place. Pictures could help some here. Jay

atm70chevy · 10-23-2019, 03:48 PM

That’s exactly what I was talking about. Was wondering if they were all that important or if I could get by without having to replace the entire rear cross sill for a wood bed.

atm70chevy · 10-23-2019, 03:55 PM

Here are a few pictures.

atm70chevy · 10-23-2019, 03:55 PM

Oops... sorry they are sideways

Anthony

**68bowtie** · 10-23-2019, 04:07 PM

I don’t believe you can secure the rear bed bolts without them??

**Clatterville trolley** · 10-23-2019, 04:08 PM

Quote:

Originally Posted by atm70chevy

Here are a few pictures.

I would be concerned that when I drew the bolts down it would 'crush' the boards down - that is what the brackets are intended to prevent. I actually made one to replace the one of my two that was missing on a bed I was working on at the time. Wasn't terribly difficult - just took a little time and patience and a small piece of sheet metal.

atm70chevy · 10-23-2019, 04:12 PM

Ok so the bed wood bolt goes through that bracket? This is my first build and I’m learning as I go....

**Clatterville trolley** · 10-23-2019, 04:15 PM

Quote:

Originally Posted by atm70chevy

Ok so the bed wood bolt goes through that bracket? This is my first build and I’m learning as I go....

Yes, it does.

**Clatterville trolley** · 10-23-2019, 04:16 PM

Quote:

Originally Posted by Clatterville trolley

Yes, it does.

I could take a picture (if you need it?) of one of mine to show what it should look like so you can get an idea of what size and shape to make new ones.

atm70chevy · 10-23-2019, 04:38 PM

That would be great. Thank you!

Anthony

72c20customcamper · 10-23-2019, 07:19 PM

Yes you need them to bolt down the rear sill to the frame

**AussieinNC** · 10-23-2019, 07:37 PM

You can either make up some new ones from metal, just make sure they are similar to the original ones...

or

You can buy a new cross sill from several suppliers....

http://www.lmctruck.com/icatalog/cb/full.aspx?Page=20

Look for item listed as 5 under Wood Bed....

Other vendors have them as well, similar prices....or maybe someone has a second hand one they could sell ya...

atm70chevy · 10-23-2019, 10:48 PM

Thanks for all the input. Does anyone have a close up picture of the brackets or have they can take a picture of so I will have an idea of what exactly I’m missing?

Thanks,
Anthony

**FirstOwner69** · 10-24-2019, 12:26 AM

Here is a link to what Mar-K has on the sills they sell.

http://mar-k.com/Catalog/index.aspx?LID=439

**Jason Banks** · 10-24-2019, 11:38 AM

I added dimensions just in case you wanted to fab something up. I have a very rusty cross sill over here in Dallas. I got a replacement used one from Green's Restoration in Cameron, TX. If you need parts and can get over that far, they have everything.

I'm about to leave town or I would go out and try to get those brackets off the rusty one for you.

**Clatterville trolley** · 10-24-2019, 12:24 PM

Here are some photos with measurements of the part I made:

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**Clatterville trolley** · 10-24-2019, 12:32 PM

Here are just some other views of the shape and form of the bracket so you can see better how it is made.
I think the most critical measurements are the height so that it doesn't hold a board up too high or let it be pulled down too low and make sure that there is enough clearance for the bolt to go down through the floor, bracket, and frame.
Hope this is helpful. Jay

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atm70chevy · 10-24-2019, 04:48 PM

Those are perfect. Thank you very much!

atm70chevy · 10-24-2019, 06:54 PM

Quote:

Originally Posted by Jason Banks

I added dimensions just in case you wanted to fab something up. I have a very rusty cross sill over here in Dallas. I got a replacement used one from Green's Restoration in Cameron, TX. If you need parts and can get over that far, they have everything.

I'm about to leave town or I would go out and try to get those brackets off the rusty one for you.

Thanks for the photos. I haven’t heard of that place before. I’ll have to look into for future parts! Thanks again

10-23-2019, 02:32 PM	#1
atm70chevy Registered User Join Date: Feb 2013 Location: Longview, Texas Posts: 173	Rear cross sill question So I am getting my bed ready for paint and noticed that the mounting brackets have been broken off of my rear cross sill. The bed is already in primer and close to being ready for paint. Are these brackets necessary or I can put it on as is or do I need I need to replace it? Anthony

10-23-2019, 03:48 PM	#3
atm70chevy Registered User Join Date: Feb 2013 Location: Longview, Texas Posts: 173	Re: Rear cross sill question That’s exactly what I was talking about. Was wondering if they were all that important or if I could get by without having to replace the entire rear cross sill for a wood bed.

10-23-2019, 03:55 PM	#4
atm70chevy Registered User Join Date: Feb 2013 Location: Longview, Texas Posts: 173	Re: Rear cross sill question Here are a few pictures. Attached Images

10-23-2019, 03:55 PM	#5
atm70chevy Registered User Join Date: Feb 2013 Location: Longview, Texas Posts: 173	Re: Rear cross sill question Oops... sorry they are sideways Anthony

10-23-2019, 04:07 PM	#6
68bowtie Senior Member Join Date: Jan 2007 Location: Turlock, CA Posts: 8,543	Re: Rear cross sill question I don’t believe you can secure the rear bed bolts without them?? __________________ Please help my sister in law with her battle with cancer https://gofund.me/902f6fce Survivor "Lil’ Mint" (67 c10 40k mile light green original paint) Project "C10 Fever" (68 factory black 396 swb) Project "Little Sister" (70 c10 blue original paint refresh) Project "Blue Bomb" (70 c30 blue original paint refresh) SOLD Project "Vitamin C" (71 c10 orange original paint refresh) SOLD

10-23-2019, 04:12 PM	#8
atm70chevy Registered User Join Date: Feb 2013 Location: Longview, Texas Posts: 173	Re: Rear cross sill question Ok so the bed wood bolt goes through that bracket? This is my first build and I’m learning as I go....

10-23-2019, 04:38 PM	#11
atm70chevy Registered User Join Date: Feb 2013 Location: Longview, Texas Posts: 173	Re: Rear cross sill question That would be great. Thank you! Anthony

10-23-2019, 07:19 PM	#12
72c20customcamper Registered User Join Date: Jul 2018 Location: Catskill Mountains,NY Posts: 8,347	Re: Rear cross sill question Yes you need them to bolt down the rear sill to the frame Attached Images __________________ Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary.

10-23-2019, 07:37 PM	#13
AussieinNC Moderator Join Date: Jun 2017 Location: Cherryville, NC Posts: 2,171	Re: Rear cross sill question You can either make up some new ones from metal, just make sure they are similar to the original ones... or You can buy a new cross sill from several suppliers.... http://www.lmctruck.com/icatalog/cb/full.aspx?Page=20 Look for item listed as 5 under Wood Bed.... Other vendors have them as well, similar prices....or maybe someone has a second hand one they could sell ya... __________________ Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox

10-23-2019, 10:48 PM	#14
atm70chevy Registered User Join Date: Feb 2013 Location: Longview, Texas Posts: 173	Re: Rear cross sill question Thanks for all the input. Does anyone have a close up picture of the brackets or have they can take a picture of so I will have an idea of what exactly I’m missing? Thanks, Anthony

10-24-2019, 12:26 AM	#15
FirstOwner69 Senior Member Join Date: May 2010 Location: Wisconsin & Arizona Posts: 4,841	Re: Rear cross sill question Here is a link to what Mar-K has on the sills they sell. http://mar-k.com/Catalog/index.aspx?LID=439

10-24-2019, 11:38 AM	#16
Jason Banks Senior Member Join Date: Dec 1999 Location: TX Posts: 1,542	Re: Rear cross sill question I added dimensions just in case you wanted to fab something up. I have a very rusty cross sill over here in Dallas. I got a replacement used one from Green's Restoration in Cameron, TX. If you need parts and can get over that far, they have everything. I'm about to leave town or I would go out and try to get those brackets off the rusty one for you.

10-24-2019, 12:24 PM	#17
Clatterville trolley Senior Member Join Date: Apr 2013 Location: Columbia, MO Posts: 1,934	Re: Rear cross sill question Here are some photos with measurements of the part I made: __________________ PayPal 1windyridgeboy@gmail.com

10-24-2019, 12:32 PM	#18
Clatterville trolley Senior Member Join Date: Apr 2013 Location: Columbia, MO Posts: 1,934	Re: Rear cross sill question Here are just some other views of the shape and form of the bracket so you can see better how it is made. I think the most critical measurements are the height so that it doesn't hold a board up too high or let it be pulled down too low and make sure that there is enough clearance for the bolt to go down through the floor, bracket, and frame. Hope this is helpful. Jay __________________ PayPal 1windyridgeboy@gmail.com

10-24-2019, 04:48 PM	#19
atm70chevy Registered User Join Date: Feb 2013 Location: Longview, Texas Posts: 173	Re: Rear cross sill question Those are perfect. Thank you very much!



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