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BROTHERS Blazer Suburban Gas Tank Kit is an easy to install kit designed as a direct replacement for the factory steel gas tank found on the 1967-72 Suburban and the 1969-72 Blazers. This kit can also be used on the 1963-72 pick-ups. This requires adding a fuel line down the passenger side frame rail and installing a filler neck assembly as described below. On the pick-up trucks, the spare tire must be relocated and the spare tire bracket removed. Also some vehicles require that a bed cross sill be trimmed for clearance. The tank is now reproduced in rust-free poly-ethylene for a trouble free, long lasting installation
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Our 1971 Project Suburban has had a lot of previous modifications prior to us acquiring it. The vehicle had been equipped with a 45 gallon (yes, 45 gallons) steel plate fuel cell in place of the original tank. Removing this tank was a challenge in itself. The old tank was secured with 4 long 1/2″ bolts going directly through the tank and the hardware was rusty and difficult to remove. Not surprising considering the trucks previous use as a tow and launch vehicle for a drag-boat team. The vehicle has been converted from a 3/4 ton to a 1/2 ton and has been lowered 5 1/2″ in the front and 6 1/2″ in the rear. Now we had the ride height were we wanted it, it was time to regain some of the ground clearance by exchanging the hulk of a tank with the 21 gallon poly tank.
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We were careful when removing the old tank because it was still about half full when it was being removed. This was because the sending unit that was in the tank went bad a few months before this swap and we always tried to keep a good amount of fuel in there. Pushing this thing is not a fun task. We lowered the tank enough to get to the fuel lines and filler hose connection. After these were removed and capped, we dropped the tank all the way down on the jack and set it aside. We did not use any of the components from the existing tank on the new unit because the tank set comes complete with the straps and a new AC Delco sending unit. The new sending unit mounts with a steel lock ring and a few screws.
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To simplify the installation we also mounted a new 3/8″ fuel hose, vent hose, and the new 1 3/8″ filler neck hose with the new tank still on the ground and capped off the ends of all hoses to keep any dirt and foreign material out during installation. The tank has provisions for a fuel return line and an additional vent, we just plugged these with some 1/4″ brass pipe plugs with some liquid teflon sealant, like we used on all the tank fittings. We put the tank up into it’s location to check the fit and see if any holes had to be drilled for the attaching hardware. We found that the two holes originally use in the frame for the drivers side bolts where too close with this new style poly tank. We drilled two holes 1″ farther out on the frame rails to accommodate the wider flanges on the new polyethylene tank. With the straps bolted to the drivers side frame rail and the tank up on the floorjack (using a 4 x 4 to support it evenly), we fed the fuel, vent and filler hoses between the frame rail and the bed floor and connected the gas tank sending unit wire.
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With the tank up and in place we started work on connecting the passenger side S-bolts. They slip into the elongated hole on the outer vertical area of the frame. The straps are a snug fit and require some patience to get started over the S-bolts. Once they are started over the bolt, a hex nut will hold them in place and allow you to tighten the straps. We tightened the straps up so they had even tension on them and double nutted the S-bolts to lock them in place.
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After the tank was mounted we connected the fuel pick-up line to our rear mounted electric fuel pump and secured the clamps. The filler neck hose had to be trimmed to length along with the filler vent hose. With these cut to length, they were connected to the vehicles original filler neck and vent. This is where the pick-up truck differs from the Suburban and Blazers. The pick-up does not have a filler neck in the bed and most of the people we have talked to have opted to graft one into the bed side on the fleet side or hide it in the wheel well on a stepside. The parts are generally available from a trailer or full size truck (tractor-trailer) supplier. Ours was pretty simple with the existing filler neck, but we decided to remove the neck to have it painted and then reinstalled it. The hoses were then double check for tightness and the tank was filled.
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59 Comments
I have a 1962 chevy c-10, the spare tire carrier has been removed. Can I you this tank in my truck, it’s already set up for a side fill tank.
Unfortunately no. The kit will not work for the 60-62 frame. The frame is much wider than the 63-72 style so you would have to make brackets to make the frame narrower.
We do however offer an aluminum gas tank in top or side fill. Part #ATK6062. Click here to view.
How many gallons does this hold?
The gas tank holds 20 gallons.
do you also sell this tank in the poly?
No we do not.
i have 71 c10 does this kit comes with the necessary fuel lines or do I need to buy a kit for it?
The fuel lines do not come with the kit. You can get hard line or rubber fuel lines from a local hardware store.
top fill tank, any diagrams and/or directions where to drill fill hose hole? I would like to have this done prior to mounting the bed. Just trying to keep it simple. (1966 swb fleetside)
Unfortunately there is no standard on where to drill the holes because it could be slightly different on each application. It is recommended to mount the bed first, then drill the holes to make sure they are right on. You wouldn’t want to mount everything then find out that the hole is slightly off alignment.
will these work for 63-66 suburban/carry all?
It will fit in the frame rails & work with the fuel gauge, but you’ll have to make your own fuel filler tube.
How much clearance is there from the tank to the floor. I have a 72 chevy pickup long bed. The tank look pretty close to the floor on the picture!
The example above is using the side-fill tank. Yes, it is close to the floor (similar to everything else at the bottom of the truck). The side-fill tank sits above the frame-rail by approximately 3/4″ to 1″. The top-fill version of the tank fits flush with the top of the frame-rail.
Do I have to cut into the bed Rails or will it fit flush with no cuting on the side mount gas tabk.
So the top fill hangs lower? 1970 C10 with -4″ Coil springs. Do you think I will have the clearance with either tank?
Thank you
You will have plenty of clearance for normal applications. It does not hang down below the rearend.
Staying with the same question, I have a 70 LWB that I want to use your conversion kit to move it from a LWB to a SWB and add the C-Notch kit. If I end up lowering the truck 5 1/2 inch’s how close will the tank be off the ground? If there a better tank to use when lowering the truck? Does this tank hang lower then the rear bumper?
We have this exact conversion on our Project Eighteen8 we built last summer. You will have no ground clearance issues with the tank once the truck is lowered and shortend. As a mater of fact, our video on YouTube shows us installing the tank on Eighteen8 AFTER it was already shortened and lowered, so you will be able to see the answer to your question. Here’s a link to the video https://www.youtube.com/watch?v=NQ33sH3unFA
Does the sending unit that comes whit it work for a tbi engine?
1960-66 comes with a 30 ohm sending unit. The 67-72 comes with a 90 ohm. There are no provisions for a pump so you’ll have to run an external pump. Hopefully this helps but if you have additional questions please give us a call.
I have a 1966 suburban carryall and would like to upgrade the gas tank to a larger one with internal fuel pump and return inlet for a fuel injection conversion I am planning. Do you have a tank that could be used for this purpose?
Unfortunately we do not have a larger tank for that specific purpose. Please give us a call to discuss this. The aluminum 63-72 truck gas side fill tank could possibly work for your application, but it would be best to call & we can figure out the best options for you.
I have a 1968 Long Bed stepside Truck. The top fill tank I received from you seems to have a conflict with a frame cross member behind the original rear end. The cross member seems to be removable since it is not as rigid as the frame rails. Is this usual in this instillation? If frame cross member is removed is there any significant problem that may occur.
The spare tire crossmember needs to be removed for installation and will not affect the rigidity of the frame rails.
What are the dimensions of the tank?
26″ wide (side to side), 13″ deep (top
to bottom and 17″ long (front to rear). 21 gallon capacity.
On a side fill how far does the tank hang below the bottom of the frame?
Hangs down approximately 7″-8″ below the frame rails.
Got a 66 C10 pickup. Would like to replace present gas tank with one to go under the bed. Will these tanks work? And which would be better- side fill or bed fill?
We offer several options for converting to a rear mount gas tank. You can give us call at 800-977-2767 and we can discuss the specific differences.
I have already purchased the under-bed tank (pt. #GTPDS66) several years ago and was unable to see any possible mounting configuration that would not interfere with the bed cross member directly beneath the wooden floor of my ’66 short-wide. I even stacked 2″ spacer blocks between the frame rail and the tank flange to lower the tank. No-Go. short of approaching a competent welder to refabricate the overall depth of the tank, I am totally stymied. Any help would be appreciated.
You will need to take a section out of the interfering bed cross sill to allow the gas tank to seat against the bottom of the frame so the straps will connect. If you need assistance, give us a call at 800-977-2767.
Will this tank fit on a 1969 G20 Sportvan?
Not sure we can help with this one, but let us know if you find out.
how will the sending unit wire connect to existing original wire?
You can just extend the existing wire from below the cab to the new sending unit behind the rearend.
are you able see the tank hanging after install from behind the vehicle?
Yes, it is visible from behind. Our aluminum tanks are only 9″ deep and provide additional ground clearance.
on my 1967 chevy pickup , I was wondering if I install the 67-72 suburban gas tank if you can see it hanging down from behind the vehicle?
Yes, it can be view below the rear bumper. The tank was not designed for max ground clearance, if that is needed I would recommend one of our aluminum tanks. They measure only 9″ deep.
I bought a tank for my 72 c10 this weekend but the straps don’t seem right. Is it possible I got the wrong straps in my box?? They are a L shape black strap
We only offer one length of straps. If you need assistance, give us a call at 800-977-2767
What size is the rubber hose for the fill neck
2″ diameter fuel hose is required.
Hi there,
Do you have the measurements of the tank?
26″ wide (side to side), 13″ deep (top
to bottom and 17″ long (front to rear). 21 gallon capacity.
I bought the top fill tank with fuel sender and mounting kit. I am just wondering what the small tube on the side is for. Thanks in advance.
It is a vent tube for expelling gas during fuel fill/sloshing. Connect a hose to it and mount it as high as possible with a loop to prevent fuel spilling during acceleration/cornering.
Dose the sending unit have the wiring kit with it or would i have to run wires to it.
You will need to extend the existing wires from the back of the cab to the new sending unit.
70 GMC LWB, After I installed the tank, I’m having problems getting fuel to the engine. What did I do wrong/not doing?
Ross, give our tech dept a call at 800-977-2767 and we will try to figure it out together.
I have a 1970 pickup truck the item description mentioned side fill only! Can it be mounted to any side? I need to mount it to the left side
The side fill spout is not interchangeable. It comes out the driver side, at the top radius.
I just ordered your 64-65 Chev. Long bed too Short bed conversation kit is there anything else I need with this tank?
No, the two kits are independent of each other. Each will work perfect for your application.
do you have instructions on installing it in a 1970 C-10? The straps i have seem to be wrong and I am trying to see if there is a step i am missing.
Hi Scott, Please give us a call so we can help you figure this out.