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Grit dog

Black Diamond, WA

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Joined: 05/06/2013

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Posted: 05/20/20 02:14pm Link  |  Quote  |  Print  |  Notify Moderator

Ben, imma do some reading on the tank switches. I recall them failing back in the day but. Never personally dealt w one yet.
Very interesting.
Plus the Fuel gauge works great, reads both tanks but as soon as it comes off full, it bounces constantly with the tank sloshing. Both senders act the same.

I may pick your brain on the tank switches once I understand what your saying bout energized and fall back.
I will bulletproof the fuel system in the near future. I’m sure all the hoses etc underneath are 35 years old.

"Yes Sir, Oct 10 1888, Those poor school children froze to death in their tracks. They did not even find them until Spring. Especially hard hit were the ones who had to trek uphill to school both ways, with no shoes." -Bert A.



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Posted: 05/20/20 06:37pm Link  |  Quote  |  Print  |  Notify Moderator

Love that truck! I have always liked older Chevy trucks. Remember the show “The fall guy.” Lol anyway I looked for a clean square body in the past but came up with the 69 C10 and was hooked. Hence bought that and enjoyed it ever since.... congrats!

A truck, a camper, a few toys, but most importantly a wonderful family.

ford truck guy


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Posted: 05/20/20 07:17pm Link  |  Quote  |  Print  |  Notify Moderator

Grit dog wrote:

ford truck guy wrote:

Thats 1 awesome looking Chebby. ! ! Love it..They just don't make that like that anymore . .

I had an "80" step side... almost identical colors..

Only issue I ever had was the selinoide that switched the gauge from passenger tank to drivers tank kept failing..... caused me to run dry once or twice

Good Luck and Happy tinkering

I missed a silver 76 K10 stepside I woulda bought a couple weeks ago. Beautiful trucks.

Yea they are... I can still picture mine... big roll bar in the back.... big KC Highlights mounted up top.. loved that truck.......

Me-Her-the kids
2020 Ford F350 SD 6.7
2020 Redwood 3991RD Garnet


Surrey, B.C.

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Joined: 11/26/2005

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Posted: 05/20/20 08:23pm Link  |  Quote  |  Print  |  Notify Moderator

Wow, what a great find! Keep your gas card handy, buddy! [emoticon]

2013 Ram 3500 Megacab DRW Laramie 4x4, 6.7L Cummins, G56, 3.73, Maximum Steel, black lthr, RAM 20k sliding hitch, Retrax, Linex, and a bunch of options incl. cargo camera
2008 Corsair Excella Platinum 34.5 CKTS fifth wheel with winter package & disc brakes



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Joined: 03/16/2008

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Posted: 05/20/20 08:29pm Link  |  Quote  |  Print  |  Notify Moderator

MetalGator wrote:

Now that's a good looking truck!

A bit dated though


The Great State of Texas

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Joined: 02/12/2011

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Posted: 05/20/20 09:13pm Link  |  Quote  |  Print  |  Notify Moderator

Grit dog wrote:

FishOnOne wrote:

Yep.... that’s when Chevy designed good looking trucks. I had a 87 with a tbi 350.

Missed a 1/2 ton 87 TBI a couple weeks ago. Same condition with a really bad black paint job. TBI and OD would have been nice as our boys daily driver.
Oh well this truck is meaner!

LOL... And it has the exact same steering wheel as my '92 Chevy truck.

'12 Ford Super Duty FX4 ELD CC 6.7 PSD 400HP 800ft/lbs
"Built Ford Proud"
'16 Sprinter 319MKS "Wide Body"


Eastern Idaho

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Posted: 05/20/20 10:14pm Link  |  Quote  |  Print  |  Notify Moderator

I had a K-30 SRW 4X4 with a 6.2L. Mine had that lighter blue on the top and dark blue at the bottom. I loved the truck. I put 225K on it, should have never sold it. They didnt make them any better Dana 60 up front, 14 bolt in the rear, 205 gear drive transfer case, TH400 auto tranny. I had dreams of finding another and putting a Dmax and a Allision in it. Hard to find a SRW K-30 in those years.

2020 Chevy 3500 CC 4X4 DRW D/A
2013 Fuzion 342
2011 RZR Desert Tan
2012 Sea Doo GTX 155
2018 Chevy 3500HD CC LB SRW 4X4 D/A
2015 Chevy Camaro ZL1


SF BayArea

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Posted: 05/21/20 11:29am Link  |  Quote  |  Print  |  Notify Moderator

Know this before you dig in, so you'll know what to look for

Tank switch is a single pole, double throw

When the switch relay coil is NOT energized, the valve has one tank line opened to the carb.

When the switch relay coil is energized, the valve switches to the other tank

Electrical gremlins had my dash fuse blow often...after...buddy who owns a speed shop build a custom 350 (Edelbrock Performer dual plane intake, Performer 4 barrel {should have kept the quad, liked it better}, 280 cam, 3 angle grind SS valves, ported/polished/CC matched/flowed heads, shotpeened anything ferris, forged rods, TRW pistons and a few other things forgot) and had his wife's cousin (who couldn'd get a job anywhere else put it in...he shorted and blew the fusable every so often the dash fuse would blow

First time...took a while to find the right fuse...there after, knew...but it would blow the spare quickly

Since the un-energized tank was empty, no fuel

Learned to use the energized tank, run it dry...then switch to the un-energized tank and drive home with no dash lights

-Ben Picture of my rig
1996 GMC SLT Suburban 3/4 ton K3500/7.4L/4:1/+150Kmiles orig owner...
1980 Chevy Silverado C10/long bed/"BUILT" 5.7L/3:73/1 ton helper springs/+329Kmiles, bought it from dad...
1998 Mazda B2500 (1/2 ton) pickup, 2nd owner...
Praise Dyno Brake equiped and all have "nose bleed" braking!
Previous trucks/offroaders: 40's Jeep restored in mid 60's / 69 DuneBuggy (approx +1K lb: VW pan/200hpCorvair: eng, cam, dual carb'w velocity stacks'n 18" runners, 4spd transaxle) made myself from ground up / 1970 Toyota FJ40 / 1973 K5 Blazer (2dr Tahoe, 1 ton axles front/rear, +255K miles when sold it)...
Sold the boat (looking for another): Trophy with twin 150's...
51 cylinders in household, what's yours?...


San Diego Ca

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Joined: 12/22/2004

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Posted: 05/21/20 01:39pm Link  |  Quote  |  Print  |  Notify Moderator

I had to once replace the tank valve on my Bronco. I used a Pollack valve which both switches the fuel as well as the sending unit. Something like this although I think I bought it straight from Pollack at the time. Link

If the valve ever fails I'll buy another as it has worked for many years for me.

Edit, I just noticed that the valve I linked is listed as 3 port, but there are two ports for returning fuel to the tanks. So the picture is of an efi switching valve but the description is for a carbureted valve which would not have a return line. Just saying be sure to get the correct part if you replace.

2001 Suburban 4x4. 6.0L, 4.10 3/4 ton
2005 Jayco Jay Flight 27BH
1986 Coleman Columbia Popup.


Northern Nevada

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Joined: 07/04/2016

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Posted: 05/21/20 02:14pm Link  |  Quote  |  Print  |  Notify Moderator

Nice truck. Better get some new gas credit cards.
When you start pulling, all of that lift and big tires can cause some problems.

* This post was edited 05/23/20 08:16am by ppine *

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