Why is my bed sitting on my new gas tank? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72truckster · 09-18-2009, 11:55 PM

I put in my new blazer thank under the bed. Then I put the box back on and the cross rail is sitting right on the tank. More troubling is that it needs to slide forward about 3in, which would make the cross rail right over the filler. It is a long box, steel floor gmc box obviosly going on a lwb 71 chev. The solution I came up with is to notch out the cross sill.

Thanks for any advice.

71swb4x4 · 09-18-2009, 11:58 PM

Can you move the tank forward or backward a couple inches?

BIGMAC68 · 09-19-2009, 12:14 AM

Unfortunately most people find this out after buying a blazer tank upgrade for the trucks. My 70 Chevy short wide has the same problem. Most people will notch the bottom of the cross sill for clearance. I plan on selling mine and going for one of the aluminum or stainless tanks being made by some of the board members. It's a shame the vendors selling these tanks don't tell you about this.

QKENUF4U · 09-19-2009, 12:03 AM

just like everyone else that runs a blazer tank.. gotta notch the rail...

71swb4x4 · 09-19-2009, 12:09 AM

The other option is to buy a factory blazer tank fill tube. It's curved to go around the cross rail.

hemihead · 09-19-2009, 12:13 AM

I have a wood bed and just relocated my cross sill back.

72truckster · 09-19-2009, 12:27 AM

Thanks for confirming that I need to cut it out. I don't know how I missed this step in my install research, because I read quite a few articles on the install and no one mentioned that it needs to be notched. The custom tanks are nice, and can see why people use them instead. So thanks for the good info and I will get out the cutting tools.

70Custom10Nut · 09-19-2009, 01:43 PM

Great info.

When you say notch the support, is it all the way across the top of the tank or just to clear the filler? I'm looking at doing this soon and will be forever grateful that this was said before I attempted the conversion. I have a wood bed BTW. Cnut

09-18-2009, 11:55 PM	#1
72truckster Registered User Join Date: Nov 2007 Location: Canada Posts: 15	Why is my bed sitting on my new gas tank? I put in my new blazer thank under the bed. Then I put the box back on and the cross rail is sitting right on the tank. More troubling is that it needs to slide forward about 3in, which would make the cross rail right over the filler. It is a long box, steel floor gmc box obviosly going on a lwb 71 chev. The solution I came up with is to notch out the cross sill. Thanks for any advice. Attached Images

09-18-2009, 11:58 PM	#2
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Re: Why is my bed sitting on my new gas tank? Can you move the tank forward or backward a couple inches? __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

09-19-2009, 12:14 AM	#3
BIGMAC68 Registered User Join Date: Oct 2005 Location: Tuttle Oklahoma Posts: 162	Re: Why is my bed sitting on my new gas tank? Unfortunately most people find this out after buying a blazer tank upgrade for the trucks. My 70 Chevy short wide has the same problem. Most people will notch the bottom of the cross sill for clearance. I plan on selling mine and going for one of the aluminum or stainless tanks being made by some of the board members. It's a shame the vendors selling these tanks don't tell you about this.

09-19-2009, 12:03 AM	#4
QKENUF4U Senior Member Join Date: Jan 2005 Location: SUNNY WARM BIKE RIDING COTTONWOOD ARIZONA Posts: 2,097	Re: Why is my bed sitting on my new gas tank? just like everyone else that runs a blazer tank.. gotta notch the rail...

09-19-2009, 12:09 AM	#5
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Re: Why is my bed sitting on my new gas tank? The other option is to buy a factory blazer tank fill tube. It's curved to go around the cross rail. __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

09-19-2009, 12:13 AM	#6
hemihead Registered User Join Date: Mar 2007 Location: Estevan, Sask, Canada Posts: 185	Re: Why is my bed sitting on my new gas tank? I have a wood bed and just relocated my cross sill back. __________________ 1967 SWB C-10, BBC 454, T400, 3.73 posi, 20" Coys 1972 K5 Blazer, SBC 400, 4 spd, 3.73, 6" lift, 35" mud grapplers 2011 Sierra Denali HD, 6.6 L Duramax, RBP 96R rims, leveled and Nitto trail grapplers, 2009 Acura MDX

09-19-2009, 12:27 AM	#7
72truckster Registered User Join Date: Nov 2007 Location: Canada Posts: 15	Re: Why is my bed sitting on my new gas tank? Thanks for confirming that I need to cut it out. I don't know how I missed this step in my install research, because I read quite a few articles on the install and no one mentioned that it needs to be notched. The custom tanks are nice, and can see why people use them instead. So thanks for the good info and I will get out the cutting tools.

09-19-2009, 01:43 PM	#8
70Custom10Nut Registered User Join Date: Sep 2007 Location: Vilseck Germany (currently) Posts: 317	Re: Why is my bed sitting on my new gas tank? Great info. When you say notch the support, is it all the way across the top of the tank or just to clear the filler? I'm looking at doing this soon and will be forever grateful that this was said before I attempted the conversion. I have a wood bed BTW. Cnut

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