In Cab Fuel Tank Question? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**67 cst swb** · 02-20-2006, 05:40 PM

Whats the difference in a EEC tank and a NON-EEC tank? And do all 71-72's have an EEC tank?
I have a local person needing a in-cab tank, I have several 67-68 tanks, but no 71-72's. I know there are the same size and mount the same, but don't know the EEC difference. I told him he might need to change the sender/outlet piece back to his orig. (his tank leaks) But are there other differences?
Thanks for any input...

BubbaGreen · 02-20-2006, 06:15 PM

The EEC stands for Evaporative Emission Control (I think) and the main differences are the EEC tank has an extra line that allows the fumes in the tank to be "vented" to a charcoal canister just under the battery in the 71/72 models. Not 100% sure, but I would think you could use the EEC tank in place of the NON-EEC by just capping those lines. There is a vent loop in the passenger side B-Pillar for the EEC tank that prevents the fuel from being siphoned out of the tank. If those lines are capped, you would definately want to use a vented gas cap.

**67 cst swb** · 02-21-2006, 10:15 AM

So, If his truck has the EEC tank, Can he use a 67-68 non-EEC tank if he replaces the sender/pick-up tube assy? Can a 67-68 non-EEC tank replace a 71-72 EEC tank?

BubbaGreen · 02-21-2006, 10:30 PM

I am rather sure it can be...does your state require any kind of "state inspections" Aside from that, you could effectively cap off the charcoal canister at that point as well. Shouldn't be an issue what so ever as far as the truck is concerned.

**67 cst swb** · 02-22-2006, 01:46 PM

No state inspection here... OK cool,... I'll give him the tank I got. It should work fine..
Thanks everyone...

RyanG · 02-25-2006, 05:07 PM

I know it is off topic from the main situation here, but I thought maybe some one might know. A question for who ever can help me out. My gas guage needle goes all the way to the left and just stays there. No idea why.

BubbaGreen · 02-25-2006, 06:59 PM

bad gauge, no +12V to side of gauge, fuel sense wire shorted to ground, float in gas tank sank

02-20-2006, 05:40 PM	#1
67 cst swb Senior Member Join Date: Nov 2001 Location: Rapid City, SD Posts: 2,281	In Cab Fuel Tank Question? Whats the difference in a EEC tank and a NON-EEC tank? And do all 71-72's have an EEC tank? I have a local person needing a in-cab tank, I have several 67-68 tanks, but no 71-72's. I know there are the same size and mount the same, but don't know the EEC difference. I told him he might need to change the sender/outlet piece back to his orig. (his tank leaks) But are there other differences? Thanks for any input... __________________ My Trucks: 1967 Chevrolet Short Wide Box 327 TH350 9" w/3.90 gears paint will be White - Current Project 1967 Chevrolet Custom LWB 283 TH400 3.73 Posi, no-AC, no-PS, no-PB, bench-seat, small-window - mostly orig driver 1967 Chevrolet CST LWB originally a 327 TH400 3.73 Posi AC PS PB, had Buddy Buckets, Small Window - parts truck 1967 Chevrolet CST LWB, 283 MT 3.73 had Buddy Buckets, Panoramic Window - parts truck 2001 Chevrolet 3500 2WD Crew Cab Dually 8.1L Allison White Last edited by 67 cst swb; 02-20-2006 at 05:41 PM.

02-20-2006, 06:15 PM	#2
BubbaGreen Senior Member Join Date: Mar 2001 Location: Cedar Park, TX Posts: 686	Re: In Cab Fuel Tank Question? The EEC stands for Evaporative Emission Control (I think) and the main differences are the EEC tank has an extra line that allows the fumes in the tank to be "vented" to a charcoal canister just under the battery in the 71/72 models. Not 100% sure, but I would think you could use the EEC tank in place of the NON-EEC by just capping those lines. There is a vent loop in the passenger side B-Pillar for the EEC tank that prevents the fuel from being siphoned out of the tank. If those lines are capped, you would definately want to use a vented gas cap. __________________ 71 Chevy C-10 SWB Fleetside RamJet-350/4L60e & Compushift/3.73Posi See it at www.prismnet.com/~grzanich

02-21-2006, 10:15 AM	#3
67 cst swb Senior Member Join Date: Nov 2001 Location: Rapid City, SD Posts: 2,281	Re: In Cab Fuel Tank Question? So, If his truck has the EEC tank, Can he use a 67-68 non-EEC tank if he replaces the sender/pick-up tube assy? Can a 67-68 non-EEC tank replace a 71-72 EEC tank? __________________ My Trucks: 1967 Chevrolet Short Wide Box 327 TH350 9" w/3.90 gears paint will be White - Current Project 1967 Chevrolet Custom LWB 283 TH400 3.73 Posi, no-AC, no-PS, no-PB, bench-seat, small-window - mostly orig driver 1967 Chevrolet CST LWB originally a 327 TH400 3.73 Posi AC PS PB, had Buddy Buckets, Small Window - parts truck 1967 Chevrolet CST LWB, 283 MT 3.73 had Buddy Buckets, Panoramic Window - parts truck 2001 Chevrolet 3500 2WD Crew Cab Dually 8.1L Allison White

02-21-2006, 10:30 PM	#4
BubbaGreen Senior Member Join Date: Mar 2001 Location: Cedar Park, TX Posts: 686	Re: In Cab Fuel Tank Question? I am rather sure it can be...does your state require any kind of "state inspections" Aside from that, you could effectively cap off the charcoal canister at that point as well. Shouldn't be an issue what so ever as far as the truck is concerned. __________________ 71 Chevy C-10 SWB Fleetside RamJet-350/4L60e & Compushift/3.73Posi See it at www.prismnet.com/~grzanich

02-22-2006, 01:46 PM	#5
67 cst swb Senior Member Join Date: Nov 2001 Location: Rapid City, SD Posts: 2,281	Re: In Cab Fuel Tank Question? No state inspection here... OK cool,... I'll give him the tank I got. It should work fine.. Thanks everyone... __________________ My Trucks: 1967 Chevrolet Short Wide Box 327 TH350 9" w/3.90 gears paint will be White - Current Project 1967 Chevrolet Custom LWB 283 TH400 3.73 Posi, no-AC, no-PS, no-PB, bench-seat, small-window - mostly orig driver 1967 Chevrolet CST LWB originally a 327 TH400 3.73 Posi AC PS PB, had Buddy Buckets, Small Window - parts truck 1967 Chevrolet CST LWB, 283 MT 3.73 had Buddy Buckets, Panoramic Window - parts truck 2001 Chevrolet 3500 2WD Crew Cab Dually 8.1L Allison White

02-25-2006, 05:07 PM	#6
RyanG Registered User Join Date: Feb 2006 Location: Gilbert, Az Posts: 180	Re: In Cab Fuel Tank Question? I know it is off topic from the main situation here, but I thought maybe some one might know. A question for who ever can help me out. My gas guage needle goes all the way to the left and just stays there. No idea why.

02-25-2006, 06:59 PM	#7
BubbaGreen Senior Member Join Date: Mar 2001 Location: Cedar Park, TX Posts: 686	Re: In Cab Fuel Tank Question? bad gauge, no +12V to side of gauge, fuel sense wire shorted to ground, float in gas tank sank __________________ 71 Chevy C-10 SWB Fleetside RamJet-350/4L60e & Compushift/3.73Posi See it at www.prismnet.com/~grzanich



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