Dorman 692-056 sending unit fitting help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**kev2809** · 03-03-2022, 05:36 PM

5.3 engine with return style rail

this is the sending unit.. Dorman 692-056 which is listed for an 88 chevy truck (suburban). the big line on the left looks like it runs to the fuel tube that has the fuel cap. 2nd line (big line) is the feed line that runs to the fuel filter, then to big line on the fuel rail. 3rd line is the return line, small fuel line on the rail runs to this. 4th line on the end is just a vent hose?

also trying to see how to connect an-6 hose to these lines. will be using the stock fuel filter. are the threads on that 16mmx1.5?

**kev2809** · 03-03-2022, 05:37 PM

actual pictures.

**truckdude239** · 03-03-2022, 05:40 PM

i cut mine and used compression style to an fittings when i did mine

**kev2809** · 03-03-2022, 05:59 PM

dang that was fast...lol

exactly what i was thinking. i seen your posts about it but wasnt sure if it was the same sender or if there are AN fittings that thread to these without cutting them off.

do you know what size the tubes are so i know which compression AN fittings to get? i measured with my crappy caliper and got .37 for the big one...which looks like a 3/8 tube? other one says .30 but the closest looks like a .31 which would be 5/16 for the smaller one?

ls1nova71 · 03-03-2022, 06:51 PM

3/8 for the feed line and 5/16 for the return.

**kev2809** · 03-03-2022, 07:43 PM

thats what i was coming up with too. ok great...thanks!

i will add the an-6 to tube fittings to the cart...1 of each!

03-03-2022, 05:36 PM	#1
kev2809 low n' slo Join Date: Mar 2009 Location: rosenberg, texas Posts: 5,134	Dorman 692-056 sending unit fitting help 5.3 engine with return style rail this is the sending unit.. Dorman 692-056 which is listed for an 88 chevy truck (suburban). the big line on the left looks like it runs to the fuel tube that has the fuel cap. 2nd line (big line) is the feed line that runs to the fuel filter, then to big line on the fuel rail. 3rd line is the return line, small fuel line on the rail runs to this. 4th line on the end is just a vent hose? also trying to see how to connect an-6 hose to these lines. will be using the stock fuel filter. are the threads on that 16mmx1.5? Attached Images __________________ 67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____\|__\|__\__ ,.,,,.,.,,.,\|_O _______ O_]

03-03-2022, 05:37 PM	#2
kev2809 low n' slo Join Date: Mar 2009 Location: rosenberg, texas Posts: 5,134	Re: Dorman 692-056 sending unit fitting help actual pictures. Attached Images __________________ 67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____\|__\|__\__ ,.,,,.,.,,.,\|_O _______ O_]

03-03-2022, 05:40 PM	#3
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,217	Re: Dorman 692-056 sending unit fitting help i cut mine and used compression style to an fittings when i did mine Attached Images __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

03-03-2022, 05:59 PM	#4
kev2809 low n' slo Join Date: Mar 2009 Location: rosenberg, texas Posts: 5,134	Re: Dorman 692-056 sending unit fitting help dang that was fast...lol exactly what i was thinking. i seen your posts about it but wasnt sure if it was the same sender or if there are AN fittings that thread to these without cutting them off. do you know what size the tubes are so i know which compression AN fittings to get? i measured with my crappy caliper and got .37 for the big one...which looks like a 3/8 tube? other one says .30 but the closest looks like a .31 which would be 5/16 for the smaller one? __________________ 67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____\|__\|__\__ ,.,,,.,.,,.,\|_O _______ O_] Last edited by kev2809; 03-03-2022 at 06:19 PM.

03-03-2022, 06:51 PM	#5
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	Re: Dorman 692-056 sending unit fitting help 3/8 for the feed line and 5/16 for the return. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

03-03-2022, 07:43 PM	#6
kev2809 low n' slo Join Date: Mar 2009 Location: rosenberg, texas Posts: 5,134	Re: Dorman 692-056 sending unit fitting help thats what i was coming up with too. ok great...thanks! i will add the an-6 to tube fittings to the cart...1 of each! __________________ 67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____\|__\|__\__ ,.,,,.,.,,.,\|_O _______ O_]



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