Ly6 4l80e - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Blazerowner** · 07-30-2014, 12:22 PM

I have a chance to purchase an Ly6 with a 4l80e and have some questions. First I'm new to this so I'm posting a few pics and want to see what you all think. First on the wiring harness I know the large box is the ECM but what is the small box in the left hand corner. Also most of the plugs work on the tranny but there is one missing what is it for? There is no pedal but I figure I can get one later but what years work and does it matter if I am having a company redo the harness?

**Blazerowner** · 07-30-2014, 12:23 PM

Have to post one pic a time for some reason.

**Blazerowner** · 07-30-2014, 12:24 PM

Pic3

**Blazerowner** · 07-30-2014, 12:25 PM

Pic4

**Blazerowner** · 07-30-2014, 12:27 PM

The 4l80e should bolt right up right?

clinebarger · 07-30-2014, 09:09 PM

Quote:

Originally Posted by Blazerowner

I have a chance to purchase an Ly6 with a 4l80e and have some questions. First I'm new to this so I'm posting a few pics and want to see what you all think. First on the wiring harness I know the large box is the ECM but what is the small box in the left hand corner. Also most of the plugs work on the tranny but there is one missing what is it for? There is no pedal but I figure I can get one later but what years work and does it matter if I am having a company redo the harness?

The small Module is The Transmission Control Module (TCM), T42 TCM to be exact, 4L60E & 4L80E used this TCM with different OS's of course. The Trans, Harness & Flexplate look correct.

**Blazerowner** · 07-31-2014, 12:41 PM

He wants 2700 shipped and claims they both have under 10k miles. Seems to be decent for what people ask on ebay but with a 6l80. He says he doesn't know what year the harness is out of which worries me. Everywhere I look people say make sure the parts are from the same year or same truck.

07-30-2014, 12:22 PM	#1
Blazerowner Senior Member Join Date: Apr 2006 Location: Yuba City, Ca Posts: 1,939	Ly6 4l80e I have a chance to purchase an Ly6 with a 4l80e and have some questions. First I'm new to this so I'm posting a few pics and want to see what you all think. First on the wiring harness I know the large box is the ECM but what is the small box in the left hand corner. Also most of the plugs work on the tranny but there is one missing what is it for? There is no pedal but I figure I can get one later but what years work and does it matter if I am having a company redo the harness? Attached Images __________________ Kirk 72 Blazer CST 4wd highlander 66 Nova

07-30-2014, 12:23 PM	#2
Blazerowner Senior Member Join Date: Apr 2006 Location: Yuba City, Ca Posts: 1,939	Re: Ly6 4l80e Have to post one pic a time for some reason. Attached Images __________________ Kirk 72 Blazer CST 4wd highlander 66 Nova

07-30-2014, 12:24 PM	#3
Blazerowner Senior Member Join Date: Apr 2006 Location: Yuba City, Ca Posts: 1,939	Re: Ly6 4l80e Pic3 Attached Images __________________ Kirk 72 Blazer CST 4wd highlander 66 Nova

07-30-2014, 12:25 PM	#4
Blazerowner Senior Member Join Date: Apr 2006 Location: Yuba City, Ca Posts: 1,939	Re: Ly6 4l80e Pic4 Attached Images __________________ Kirk 72 Blazer CST 4wd highlander 66 Nova

07-30-2014, 12:27 PM	#5
Blazerowner Senior Member Join Date: Apr 2006 Location: Yuba City, Ca Posts: 1,939	Re: Ly6 4l80e The 4l80e should bolt right up right? Attached Images __________________ Kirk 72 Blazer CST 4wd highlander 66 Nova

07-31-2014, 12:41 PM	#7
Blazerowner Senior Member Join Date: Apr 2006 Location: Yuba City, Ca Posts: 1,939	Re: Ly6 4l80e He wants 2700 shipped and claims they both have under 10k miles. Seems to be decent for what people ask on ebay but with a 6l80. He says he doesn't know what year the harness is out of which worries me. Everywhere I look people say make sure the parts are from the same year or same truck. __________________ Kirk 72 Blazer CST 4wd highlander 66 Nova



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