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Old 03-04-2008, 11:37 PM   #1
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Exclamation 4L60E to 4L80E Wiring Swap

Edited: all info on this post..





How to swap wires.

Transmission connector:



Remove cover:




Remove white end:



Small knife works good to bend the lil grey clip back to remove the ends:




Put the white piece back on, the grey cover, and your finished, that easy.




After all that work,,, i think this 2004 harness is already a 80E harness
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2000 ECSB Silverado-LQ4/Isky 215/4L80E/KBRacing S475
13.9@104 5psi
12.9@113 ~ 5-25psi on cooper AT3's


Oil Filter Part Numbers
NGK Spark Plug Info
4L60E-4L80E Wiring Swap
GM Fluid Capacities
What Gear Ratios Do I Have?
E-fan Harness 101

Last edited by nonnieselman; 09-29-2009 at 09:17 PM.
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Old 03-05-2008, 12:29 AM   #2
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The 60e has 13 wires in the connector..





The 80e has 11 wires in the connector..






I put both the pics together so it does look like removing 2 wires and moving one of them should do the trick.. i just need a diagram of a 80E to verify.

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-Jonathan

2000 ECSB Silverado-LQ4/Isky 215/4L80E/KBRacing S475
13.9@104 5psi
12.9@113 ~ 5-25psi on cooper AT3's


Oil Filter Part Numbers
NGK Spark Plug Info
4L60E-4L80E Wiring Swap
GM Fluid Capacities
What Gear Ratios Do I Have?
E-fan Harness 101
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Old 03-05-2008, 09:29 AM   #3
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Mine - 04 Crew Cab Silverado 2500 | 6.0L | 4L80e | 4wd | L92 heads/intake | 1-7/8 LTs
Wife's - 2011 GMC Yukon XL 5.3 | 6 speed
My old Silverado 6.0L swap <---Video - Click it !
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Old 03-05-2008, 08:10 PM   #4
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anybody??? TTT
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-Jonathan

2000 ECSB Silverado-LQ4/Isky 215/4L80E/KBRacing S475
13.9@104 5psi
12.9@113 ~ 5-25psi on cooper AT3's


Oil Filter Part Numbers
NGK Spark Plug Info
4L60E-4L80E Wiring Swap
GM Fluid Capacities
What Gear Ratios Do I Have?
E-fan Harness 101
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Old 03-07-2008, 02:17 AM   #5
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Ttt.....
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-Jonathan

2000 ECSB Silverado-LQ4/Isky 215/4L80E/KBRacing S475
13.9@104 5psi
12.9@113 ~ 5-25psi on cooper AT3's


Oil Filter Part Numbers
NGK Spark Plug Info
4L60E-4L80E Wiring Swap
GM Fluid Capacities
What Gear Ratios Do I Have?
E-fan Harness 101
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Old 03-09-2008, 02:41 PM   #6
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What you said looks correct for your model year. Don't think you have to bother pulliing # 42 Red as there will be nothing connected to it on the trans side anyway. Just move the #79 Blue to #2 Red.

Or you could just pull pins S (WHT) and U (BRN) at the trans connector, move the BRN wire to the S position, and leave the white disconnected (or put it in the now unused U position for safekeeping).

Plus you will require the additional AT ISS sensor connected to pins 22 and 23 of your red PCM connector. Pin A to Pin 22, Pin B to Pin 23.

Let us know how it works out.

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Last edited by DrX; 03-09-2008 at 03:24 PM.
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Old 03-09-2008, 04:24 PM   #7
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thanks DrX!!!
ill try that and post up what happens... saves me $160
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-Jonathan

2000 ECSB Silverado-LQ4/Isky 215/4L80E/KBRacing S475
13.9@104 5psi
12.9@113 ~ 5-25psi on cooper AT3's


Oil Filter Part Numbers
NGK Spark Plug Info
4L60E-4L80E Wiring Swap
GM Fluid Capacities
What Gear Ratios Do I Have?
E-fan Harness 101
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Old 03-17-2008, 08:09 AM   #8
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this should be a sticky somewhere.. it works on my 2000.. I can't confirm what other year models it works on though..
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-Jonathan

2000 ECSB Silverado-LQ4/Isky 215/4L80E/KBRacing S475
13.9@104 5psi
12.9@113 ~ 5-25psi on cooper AT3's


Oil Filter Part Numbers
NGK Spark Plug Info
4L60E-4L80E Wiring Swap
GM Fluid Capacities
What Gear Ratios Do I Have?
E-fan Harness 101
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Old 03-17-2008, 08:25 AM   #9
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Good to hear!

The PCM pin positions will be a little different for newer trucks with the Blue and Green connectors. But if you swap the pins at the trans connector it will be the same procedure. The speed sensor will be connected to pins 22 and 23 of the Green connector.
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Old 03-17-2008, 08:58 AM   #10
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pretty cool . . . . haven't seen anyone else do this.
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Mine - 04 Crew Cab Silverado 2500 | 6.0L | 4L80e | 4wd | L92 heads/intake | 1-7/8 LTs
Wife's - 2011 GMC Yukon XL 5.3 | 6 speed
My old Silverado 6.0L swap <---Video - Click it !
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Old 03-17-2008, 08:58 AM
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