I need a wiring diagram for a TBI that came out 87 chevy 3/4 ton truck that I'm putting in to my 72 chevy truck 4x4. I have the harness from the 87 and computer but want to make sure I'm hooking everything up right.

https://www.google.com/search?q=chevy+c20+silverado+dual+fuel+tank+wiring

dual tank wiring - The 1947 - Present Chevrolet & GMC ...

67-72 Chevy Trucks http://67-72chevytrucks.com > vboard > showthread
Feb 22, 2007 - I wiring scheme for a stock dual tank setup is as follows: On the fuel tank selector valve: Pink/Black = Right Tank Sending Unit. Pink/White = ...

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1987 R20 Dual Tank wiring

73-87 Chevy Trucks http://forum.73-87chevytrucks.com > smforum Mar 8, 2020 - Unless the factory switch has been unplugged or repurposed, it is connected through four wires to 12-volt power via the fuel pump relay (tan/wht) ...

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In the link

https://www.google.com/search?q=5.7+liter+engine+chevy+1995+chevy+350+tbi+vacuum+line+diagram

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https://books.google.com/books?id=rUmRmpaOyLIC&pg=PA162&lpg=PA162&dq=87+chevy+454+crankshaft+position+sensor+location&source=bl&ots=bGi2T6mTsZ&sig=ACfU3U337cRsZ77uqDcRbxycw8RdrMxrSQ&hl=en&sa=X&ved=2ahUKEwij182Ar9D0AhUZjYkEHUmYAD0Q6AF6BAgvEAM#v=onepage&q=87%20chevy%20454%20crankshaft%20position%20sensor%20location&f=false

Probly bad ground or pressure regulator on rail..chec for vacuum. Computr may not h recognizn engine..then ya need a reflash

your request is for two generations of c-10 - 67 -- 72 are as follows
Yahoo Image Search Results Page 67 72 Chevy Wiring Diagram and these are 73 - 87 courtesy of 73-87chevy trucks,com
Complete 73 87 Wiring Diagrams

PDF]1980 service manual - 73-87ChevyTrucks.com. Classic ...

www.73-87chevytrucks.com/.../ST_330_80_1980_Chevrolet_Light_Tru...

Wiring diagrams for 1980 trucks are contained in a separate Wiring. Diagram Booklet.... Some of these service operations require the use of tools specially designed .... 1-1/2 Ton. 2-3/4 Ton. 3-1 Ton. 4-1/2 Ton (W/HDSusp). Fig. 0A-3-Vehicle Identification Number ... Right Hand Side of Cylinder Block at Rear of Distributor.

HEI Distributor Pickup Coil Test - YouTube

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images for wiring diagram for 350 chevy 1980
Complete 73-87 Wiring Diagrams - 73-87chevytrucks.comforum.73-87chevytrucks.com/smforum/index.php?topic=11766.0Apr 8, 2009 - 1 post - ‎1 authorHere are the complete wiring harness schematics for the 73-87 series. These are HUGE jpgs so you may want to save and print them off.[PDF]1980 Chevy - 73-87ChevyTrucks.com. Classic Chevy ...www.73-87chevytrucks.com/.../ST_330_80_1980_Chevrolet_Light_Tru...1980 Chevrolet Passenger Car and Light Duty Truck Unit Repair (Overhaul). Manual.Wiring diagrams for 1980 trucks are contained in a separate Wiring. Diagram Booklet...... 8-Cylinder Gasoline Engine Code is (305, 350, 400. CID) Located ...

Hey Shane , sorry you cant get the whole diagram that would be a lot of pages , you can narrow your search and go to ( images of wiring diagrams ) and include vehicle info

GM trucks are prewired foe 4 wire trailer harness go to Autozone or other parts house and you can buy a direct plug in harness. GM just tapes the connector around the rear area near bumper on the harness.

on a vehicle that old the wires are brittle start at the injector and check for cracked or broken wire in the harness

I know from Experience on Rebuilding my Chevelle www.PainlessWiring.com has everything that you need for this Conversion.