Did these trucks have dual fuel tanks? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bobs409 · 04-29-2003, 08:35 AM

I was crawling around under my 71 C-20 yesterday and found an old fuel line running back to where the spare would be mounted. It just ends and is plugged up and the other end goes under the cab floor and stops. Was there ever a gas tank on these in that location? maybe dual tanks??? The truck has the tank behind the seat. The box has been changed so no way of knowing if there was ever a filler in that.

mtdave2 · 04-29-2003, 08:44 AM

not back that far. they did have saddle tanks in the front of the bed on each side.

bpmcgee · 04-29-2003, 09:53 AM

Is it possible someone put a blazer tank in there at one time for a spare tank? That would be about the right location -- just behind the rear axle.

Brian

bobs409 · 04-29-2003, 02:53 PM

The brackets holding the line to the frame look factory though. The line itself looks factory bent. The front part of the line ends where the other line comes down through the cab.

I have no history on this truck so im clueless.

Maybe I can get some digital pics later

**Joesjunk** · 04-30-2003, 12:31 AM

Yes, you could have had an auxillary fuel tank option code "NL2". Here is an option sticker with it listed. It was on the drivers side in front of the rear tire.

Longhorn Man · 04-30-2003, 12:35 AM

But nothing stock way back there though.

04-30-2003, 03:44 AM

See it makes me wonder too. I had a saddle tank on the drivers side, in front of the rear wheel. But I can switch to what tank I want to use from inside of the cab. Its a black switch that next to the door and seat. Did they make it only on one side or did they only come on both sides?

bobs409 · 04-30-2003, 08:28 AM

This line goes all the way back and points right to where the spare would be. Im taking the box off today if all goes well so I should be able to get some pics. The line is rusted badly like it was on there since 1971! LOL It had what appears to be factory clips holding it in. (I could be wrong)

While it may have been added (I doubt it) it sure looks stock to me. There's nothing else custom on this truck so I can't imagine someone adding a Blazer tank, then removing it later.

There's no auxillary tank listed on my label either.

bobs409 · 05-01-2003, 02:21 PM

Here's what the line looks like. Notice the clip. It has these running all along and the line is bent nicely. If someone added this, they did a nice job. But...what the heck happened to the tank? (im assuming it was a gas tank)

I did notice another oddity. There are old pop rivets running all around the gas filler hole on the cab. (found under some bodyfiller)

Im starting to think that someone did have a Blazer tank in there but it was removed by someone else later on. Maybe a crude patch over the filler hole???

Truck had the tank behind the seat when I bought it.

Hmmm. What year Blazer tanks would fit this? Im starting to consider going that way with it.

bpmcgee · 05-01-2003, 02:27 PM

The 69-72 blazers all used the same tank -- a 21 gallon tank that fit between the frame rails right there and hung down about 3 inches.

I think that people are getting these tanks (poly versions of these are the best, IMHO), and putting them in their trucks. It should be a pretty simple installation -- there's just two straps that hold it up against the frame.

Brian

73stepside · 05-01-2003, 06:31 PM

my truck has the saddle tanks on both sides. they haven't been used in some time and are rusted. it has the switch next to the seat also. gonna take them out but the bolts are rusted to the tank and won't break free. i also have the flapper doors in the side of the bed. which are covered in oklahoma red dirt which won't come off easy. my set up is an add on from the dealer i believe. can't find anything on my optoins sticker. anyone know the code for this?

edited for additional info

JREs69er · 05-02-2003, 03:36 AM

I'm with 73Stepside, I also have 3 tanks. 1 on each side in front of the rear wheels and 1 behind the seat. Looks pretty stock to me. Will check the option sheet to see if it shows up for aux tanks.

JREs69er · 05-02-2003, 03:50 AM

I'm with 73Stepside, I also have 3 tanks. 1 on each side in front of the rear wheels and 1 behind the seat. Looks pretty stock to me. Will check the option sheet to see if it shows up for aux tanks.

04-29-2003, 08:35 AM	#1
bobs409 1969 Custom 30 wrecker Join Date: Sep 2001 Location: Pottsville, Pa Posts: 2,611	Did these trucks have dual fuel tanks? I was crawling around under my 71 C-20 yesterday and found an old fuel line running back to where the spare would be mounted. It just ends and is plugged up and the other end goes under the cab floor and stops. Was there ever a gas tank on these in that location? maybe dual tanks??? The truck has the tank behind the seat. The box has been changed so no way of knowing if there was ever a filler in that. __________________ Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10

04-29-2003, 08:44 AM	#2
mtdave2 newly minted old timer Join Date: Dec 1999 Location: Hudson WI Posts: 3,520	not back that far. they did have saddle tanks in the front of the bed on each side. __________________ ____________________________________________ 72 c20 longhorn 65k org miles and counting! 69 k10 Suburban

04-29-2003, 02:53 PM	#4
bobs409 1969 Custom 30 wrecker Join Date: Sep 2001 Location: Pottsville, Pa Posts: 2,611	The brackets holding the line to the frame look factory though. The line itself looks factory bent. The front part of the line ends where the other line comes down through the cab. I have no history on this truck so im clueless. Maybe I can get some digital pics later __________________ Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10

04-30-2003, 12:31 AM	#5
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,698	Yes, you could have had an auxillary fuel tank option code "NL2". Here is an option sticker with it listed. It was on the drivers side in front of the rear tire. Attached Images __________________ 72 3/4t Custom Deluxe 402/auto 66k Original paint 71 3/4t 4x4 Custom Deluxe 10k original miles Original paint 71 3/4t Cheyenne 402 70k original paint 72 3/4t 4x4 Custom deluxe 72 3/4t 4x4 Custom deluxe 91k original paint 72 Cheyenne/30 Dually 69 Camaro SS396 4-speed 13 GMC 2500HD Duramax I bought new 05 Jeep Wrangler "Willys Edition" 12k miles (I bought new) 85 3/4 ton 4x4 Scottsdale 33k miles original paint 86 1 ton 4x4 SRW Silverado 454 restored 80 1 ton 4x4 SRW Silverado 9,434 original miles!! original paint 95 GMC 1 ton dually 4x4 my dad bought new 95 GMC 3/4 ton 4x4, regular cab 454, 31k original miles 2002 2500HD 4x4 regular cab 6.0L 67k miles 2002 2500HD 4x4 regular cab 8.1L 28k miles 2003 GMC 2500HD 4x4 regular cab Diesel 93k miles 67-72 Parts for sale

04-30-2003, 08:28 AM	#8
bobs409 1969 Custom 30 wrecker Join Date: Sep 2001 Location: Pottsville, Pa Posts: 2,611	This line goes all the way back and points right to where the spare would be. Im taking the box off today if all goes well so I should be able to get some pics. The line is rusted badly like it was on there since 1971! LOL It had what appears to be factory clips holding it in. (I could be wrong) While it may have been added (I doubt it) it sure looks stock to me. There's nothing else custom on this truck so I can't imagine someone adding a Blazer tank, then removing it later. There's no auxillary tank listed on my label either. __________________ Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10

04-29-2003, 09:53 AM	#3
bpmcgee Registered User Join Date: Mar 2003 Location: Northern Illinois Posts: 2,181	Is it possible someone put a blazer tank in there at one time for a spare tank? That would be about the right location -- just behind the rear axle. Brian

04-30-2003, 12:35 AM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	But nothing stock way back there though.

04-30-2003, 03:44 AM	#7
Linus00014 Guest Posts: n/a	See it makes me wonder too. I had a saddle tank on the drivers side, in front of the rear wheel. But I can switch to what tank I want to use from inside of the cab. Its a black switch that next to the door and seat. Did they make it only on one side or did they only come on both sides?

05-01-2003, 02:21 PM	#9
bobs409 1969 Custom 30 wrecker Join Date: Sep 2001 Location: Pottsville, Pa Posts: 2,611	Here's what the line looks like. Notice the clip. It has these running all along and the line is bent nicely. If someone added this, they did a nice job. But...what the heck happened to the tank? (im assuming it was a gas tank) I did notice another oddity. There are old pop rivets running all around the gas filler hole on the cab. (found under some bodyfiller) Im starting to think that someone did have a Blazer tank in there but it was removed by someone else later on. Maybe a crude patch over the filler hole??? Truck had the tank behind the seat when I bought it. Hmmm. What year Blazer tanks would fit this? Im starting to consider going that way with it. Attached Images __________________ Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10

05-01-2003, 02:27 PM	#10
bpmcgee Registered User Join Date: Mar 2003 Location: Northern Illinois Posts: 2,181	The 69-72 blazers all used the same tank -- a 21 gallon tank that fit between the frame rails right there and hung down about 3 inches. I think that people are getting these tanks (poly versions of these are the best, IMHO), and putting them in their trucks. It should be a pretty simple installation -- there's just two straps that hold it up against the frame. Brian

05-01-2003, 06:31 PM	#11
73stepside Registered User Join Date: Feb 2002 Location: Moore OK 73160 Posts: 974	my truck has the saddle tanks on both sides. they haven't been used in some time and are rusted. it has the switch next to the seat also. gonna take them out but the bolts are rusted to the tank and won't break free. i also have the flapper doors in the side of the bed. which are covered in oklahoma red dirt which won't come off easy. my set up is an add on from the dealer i believe. can't find anything on my optoins sticker. anyone know the code for this? edited for additional info __________________ 04 GMC Sierra RCSS 70 CST LWB 04 HD Sportster 1200 Custom Last edited by 73stepside; 05-02-2003 at 04:11 AM.

05-02-2003, 03:36 AM	#12
JREs69er Registered User Join Date: Apr 2003 Location: Romeoville, IL Posts: 75	Gas tanks I'm with 73Stepside, I also have 3 tanks. 1 on each side in front of the rear wheels and 1 behind the seat. Looks pretty stock to me. Will check the option sheet to see if it shows up for aux tanks.

05-02-2003, 03:50 AM	#13
JREs69er Registered User Join Date: Apr 2003 Location: Romeoville, IL Posts: 75	Gas tanks I'm with 73Stepside, I also have 3 tanks. 1 on each side in front of the rear wheels and 1 behind the seat. Looks pretty stock to me. Will check the option sheet to see if it shows up for aux tanks.



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