Conversions & Swaps LSX Engines in Non-LSX Vehicles
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5.3L into 86 C1500

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Old Jul 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?
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Old Jul 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...
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Old Jul 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
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Old Jul 19, 2011 | 01:23 PM
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I don't believe its a direct bolt in, modifications will need to be made.
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Old Jul 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
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Old Jul 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.
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Old Jul 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?
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Old Jul 22, 2011 | 06:00 PM
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I don't think my my drivetrain is FBW would I still need the peddle
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Old Jul 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.
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Old Jul 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?
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Old Jul 24, 2011 | 03:30 PM
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U can buy the painlesswire on summit bro
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Old Jul 25, 2011 | 03:22 PM
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The red plug appears to be the brake system harness
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Old Jul 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
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Old Jul 27, 2011 | 08:28 AM
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Will I need to get the ECM reflagged for this transplant?
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Old Jul 27, 2011 | 09:51 PM
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ecm will need to be reflashed to turn off vats, rear o2 sensors etc
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Old Aug 7, 2011 | 11:11 AM
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who do I send it out to for reflashing?
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Old Oct 4, 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?
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Old Oct 7, 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
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Old May 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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