07 5.3 & 4L60 into 84 1/2 ton Chevy
#1
On The Tree
Thread Starter
07 5.3 & 4L60 into 84 1/2 ton Chevy
Well plans changed and instead of getting the 4.8l I planned on I got a deal on an 07 LM7 5.3 & 4L60 w/ 7k miles from LKQ. Motor has full wiring harness, computer, all accessories, dual elect. fans, etc. I will have lots of issues but here are the first:
I am trying to not have to fork over another grand + for a custom harness. Looked in stickys, posts, etc trying to find some wiring diagrams/schematics on this motor. Any suggestions, books, etc? Any fairly cheap companies out there make a retrofit harness or modify this one? I need to save some $$$ here if I can.
Also I told them I needed the gas pedal and control module (DBW) for it. I got the pedal and the pedal harness but they said there was no control module there. There is a small, very thin module in the back of the engine harness. Could this be the control module for the pedal? I planned on getting an 03 motor and obviously they changed a few things from 03 to 07.
What about the return fuel line on this motor? I planned on using the C5 fuel filter/reg b/c I was told 03-up had a single fuel line w/ no return. Obviously that was wrong too. Do I need to keep the return line setup like it is? Do I need to run it from the engine back to the sender? Which filter should I run?
Thanks!
I am trying to not have to fork over another grand + for a custom harness. Looked in stickys, posts, etc trying to find some wiring diagrams/schematics on this motor. Any suggestions, books, etc? Any fairly cheap companies out there make a retrofit harness or modify this one? I need to save some $$$ here if I can.
Also I told them I needed the gas pedal and control module (DBW) for it. I got the pedal and the pedal harness but they said there was no control module there. There is a small, very thin module in the back of the engine harness. Could this be the control module for the pedal? I planned on getting an 03 motor and obviously they changed a few things from 03 to 07.
What about the return fuel line on this motor? I planned on using the C5 fuel filter/reg b/c I was told 03-up had a single fuel line w/ no return. Obviously that was wrong too. Do I need to keep the return line setup like it is? Do I need to run it from the engine back to the sender? Which filter should I run?
Thanks!
#2
TECH Resident
There are companies that will modify the harness you have, I know Current Performance will do it.
You do not need any extra modules for that year engine, just the engine computer and gas pedal.
There should be no return line on an '07, you should be able to use the returnless system like you had planned.
You do not need any extra modules for that year engine, just the engine computer and gas pedal.
There should be no return line on an '07, you should be able to use the returnless system like you had planned.
#3
Maybe you should PM or email Allen over at Nelson Performance. He does harness work and he's not too far from you(San Antonio). Even if you don't buy a harness from him, he could probably give you some good advice on what to do.
#4
On The Tree
Thread Starter
#5
TECH Regular
The plastic line is you evap line. It routes fuel tank vapors to the engine and that solenoid is pulsewidth modulated and lets the vapors in when the pcm tells it to.
#7
On The Tree
Thread Starter
I'm using an 87 Chevy FI sending unit. The vent line is for a 3/16" hose. The 'vapor' lione on this 5.3 is 3/8" line. Will it matter to the solenoid/computer if I mate the 3/16 line to the 3/8 line?
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#8
On The Tree
Thread Starter
Is this a return line or a vapor line?
Trying to find out what you guys have been running for this vent/vapor line? My engine's an '07 5.3 from a Silverado into 84 C10.
I'm using an 87 Chevy FI sending unit. The vent line is for a 3/16" hose. The 'vapor' lione on this 5.3 is 3/8" line. Will it matter to the solenoid/computer if I mate the 3/16 line to the 3/8 line?
I'm using an 87 Chevy FI sending unit. The vent line is for a 3/16" hose. The 'vapor' lione on this 5.3 is 3/8" line. Will it matter to the solenoid/computer if I mate the 3/16 line to the 3/8 line?