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5.3L into 86 C1500

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Old 07-18-2011, 08:30 PM
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Default 5.3L into 86 C1500

I have a 2002 Chevrolet Tahoe with a 5.3L that I will be using for a donor vehicle for my 1986 Chevrolet pickup, first off I want to make sure I get everything I will need from the donor vehicle I've removed the radiator, ECM, under hood fuse/power distribution box, fuel tank, I know I have to get the gas peddle anything else?
Old 07-18-2011, 09:54 PM
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Originally Posted by Atl_monte
I have a 2002 Chevrolet Tahoe with a 5.3L that I will be using for a donor vehicle for my 1986 Chevrolet pickup, first off I want to make sure I get everything I will need from the donor vehicle I've removed the radiator, ECM, under hood fuse/power distribution box, fuel tank, I know I have to get the gas peddle anything else?
Feul tank, lines, filter, air box, a/c setup, p/s pump, wiring harness, transmission...
Old 07-19-2011, 09:21 AM
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Originally Posted by superbean
Feul tank, lines, filter, air box, a/c setup, p/s pump, wiring harness, transmission...
Will the fuel tank actually bolt onto the 1986 Chevy truck? how much of the wiring harness do I need? I disconnected and left the engine harness on the engine but there were a couple other harnesses pluged int othe fuse/power distribution box
Old 07-19-2011, 01:23 PM
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I don't believe its a direct bolt in, modifications will need to be made.
Old 07-20-2011, 08:38 PM
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Originally Posted by superbean
Feul tank, lines, filter, air box, a/c setup, p/s pump, wiring harness, transmission...
got all that weel all but the fuel lines which I'll try to get tomorrow, what about the driveshaft my 86 had an TH400 trans/ 327 sbc drivetrain previous to this conversion
Old 07-21-2011, 08:00 PM
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Originally Posted by Atl_monte
got all that weel all but the fuel lines which I'll try to get tomorrow, what about the driveshaft my 86 had an TH400 trans/ 327 sbc drivetrain previous to this conversion
Feul lines you will have to switch to a hardline or high pressure feul line. Drive shaft can more than likely stay unchanged unless you mount the motor back really far.
Old 07-22-2011, 05:52 PM
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Removing wiring removed the fuse box/power distribution box I know I need the harness white the black plug(engine harness) the warness with the green plug appears to be for the lights shouldn't need that, what about the harnesses with the red plug and the one white the white plug?
Old 07-22-2011, 06:00 PM
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I don't think my my drivetrain is FBW would I still need the peddle
Old 07-23-2011, 02:37 PM
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you will need the cable, pedal travel should be comparable but it is a couple bolts so might as well take it off in case you do need it.
Old 07-24-2011, 02:27 PM
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Will I need to get my computer reflashed? still looking for an to the following

Originally Posted by Atl_monte
Removing wiring removed the fuse box/power distribution box I know I need the harness white the black plug(engine harness) the warness with the green plug appears to be for the lights shouldn't need that, what about the harnesses with the red plug and the one white the white plug?
Old 07-24-2011, 03:30 PM
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U can buy the painlesswire on summit bro
Old 07-25-2011, 03:22 PM
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The red plug appears to be the brake system harness
Old 07-27-2011, 08:27 AM
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The white plug appears to contain the cruise control harness and the cabin dianogstic port which Si believe is all need from the harness with the white plug but this harness is quite difficult to remove
Old 07-27-2011, 08:28 AM
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Will I need to get the ECM reflagged for this transplant?
Old 07-27-2011, 09:51 PM
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ecm will need to be reflashed to turn off vats, rear o2 sensors etc
Old 08-07-2011, 11:11 AM
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who do I send it out to for reflashing?
Old 10-04-2011, 09:42 PM
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I noticed some LSx conversion motor mounts state that they move the drivetrain forward1" and some dont would it be nescecary to move the location in this install?
Old 10-07-2011, 02:42 PM
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For example most ppl use this mount Trans-Dapt Performance Products 4595 - Trans-Dapt Performance Engine Swap Motor Mounts which sets the engine back 1" but most ppl running this mount also run an older style transmission, I plan to run the 4L60 and not sure if I require that set back
Old 05-30-2012, 06:17 PM
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I know its been a minute but finally getting back around to this project



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