Installing a rear tank sending unit question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

oldgmc · 03-09-2009, 03:58 PM

I will be installing a rear tank (75 Blazer or similar) In my 79 K35. I have a great link someone here sorry I forget who sent it. Question is my original set up had 2 - 20 gal side tanks had a 3 outlet sender and the vent was on the tank next to the filler. Do I need a 3 or 4 outlet sending unit with new tank. The truck being a one ton does not need emissions like a canister ,egr or cats. From what I can tell the blazer tank has the vent line on the sending unit.
The sending unit is expensive so I want to get the correct one
Thanks

**Captkaos** · 03-09-2009, 09:29 PM

You only need 3 on a carb setup. Fuel, return, Purge

mainermikeyd · 03-10-2009, 07:35 AM

Oldgmc could you take some pics of your install an such, I also am considering to install a blazer tank, would be interested in your progress, THANKS

**Captkaos** · 03-10-2009, 09:11 AM

This is my how-to for the Blazer install I did about 10 years ago.
http://www.captkaoscustoms.com/blazertank.html

03-09-2009, 03:58 PM	#1
oldgmc Registered User Join Date: Oct 2006 Location: nj Posts: 54	Installing a rear tank sending unit question I will be installing a rear tank (75 Blazer or similar) In my 79 K35. I have a great link someone here sorry I forget who sent it. Question is my original set up had 2 - 20 gal side tanks had a 3 outlet sender and the vent was on the tank next to the filler. Do I need a 3 or 4 outlet sending unit with new tank. The truck being a one ton does not need emissions like a canister ,egr or cats. From what I can tell the blazer tank has the vent line on the sending unit. The sending unit is expensive so I want to get the correct one Thanks Last edited by oldgmc; 03-09-2009 at 03:58 PM.

03-09-2009, 09:29 PM	#2
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: Installing a rear tank sending unit question You only need 3 on a carb setup. Fuel, return, Purge __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com Last edited by Captkaos; 03-09-2009 at 09:30 PM. Reason: I can't add.

03-10-2009, 07:35 AM	#3
mainermikeyd Registered User Join Date: Sep 2008 Location: Limington, ME Posts: 290	Re: Installing a rear tank sending unit question Oldgmc could you take some pics of your install an such, I also am considering to install a blazer tank, would be interested in your progress, THANKS __________________ Once a Marine Always a Marine OOH-RAH GM Fanatic 1982 K20 4" Rancho lift 350cid, edelbrock performer intake 1405 carb, hedman headers, TH350, " Wheres the MUD!!!!!!!!!!" 1986 c30 camper special 454, th400 (for sale) 1984 K10 Big Ten (project) needs motor 1984 C10 355, 700r4, (project) needs shortbox bed

03-10-2009, 09:11 AM	#4
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: Installing a rear tank sending unit question This is my how-to for the Blazer install I did about 10 years ago. http://www.captkaoscustoms.com/blazertank.html __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com



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