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Old 03-09-2009, 03:58 PM   #1
oldgmc
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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.
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Old 03-09-2009, 09:29 PM   #2
Captkaos
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Re: Installing a rear tank sending unit question

You only need 3 on a carb setup. Fuel, return, Purge
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1991 R3500 SRW CrewCab
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Last edited by Captkaos; 03-09-2009 at 09:30 PM. Reason: I can't add.
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Old 03-10-2009, 07:35 AM   #3
mainermikeyd
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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
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Old 03-10-2009, 09:11 AM   #4
Captkaos
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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
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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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