vorteciroc

Electrical Connector Information for LSx (Gen-III/ IV SBC) Transmission (4L60E/ 4L65E/ 4L70E) Swaps.
(4L80E/ 4L85E Transmission Electrical Connectors will not be discussed in this Thread).

The 4L60E/ 4L65E/ 4L70E Family of Transmissions uses 3 different types of external Electrical Connections.
All of which received revisions/ updates and changes over the 20-Years of Production, and nearly another 10-Years Post-Production.

The First type is the "Main Electrical Connector".
This Connection is located on the Passenger Side of the Transmission Case, passes through the Case, and is responsible for all Internal Electrical Connections.
The Male Connector and Female Connector, that make-up the "Main Electrical Connector" can be seen in the Image below:

More information regarding the "Main Electrical Connector" will follow later in this Thread.



The Second type of external Electrical Connection, is the Vehicle Speed Sensor/ Transmission Output-Shaft Speed Sensor Electrical Connector.
On 2-Wheel Drive Vehicles, this Electrical Connection and Sensor are found within the Transmission Tail-Housing.
On 4-Wheel Drive Vehicles, this Electrical Connection and Sensor are found within the Transfer-Case Assembly.
The 2 Images below show the 2-Wheel Drive VSS location, and the Electrical Connector for it:


More information regarding the Vehicle Speed Sensor/ Transmission Output-Shaft Speed Sensor Connector, will follow later in this Thread.



The Third and Last type of external Electrical Connection, is the Neutral-Safety/ Park Neutral Position (and Reverse-Range Illumination) Switch Assembly Connectors.
The Neutral-Safety/ Park Neutral Position (and Reverse-Range Illumination) Switch Assembly is located on the Driver Side of the Case at the Selector-Shaft/ Linkage Connection.
The 3 Images below, show the Neutral-Safety/ Park Neutral Position (and Reverse-Range Illumination) Switch Assembly... and corresponding Electrical Connectors:



More information regarding the Neutral-Safety/ Park Neutral Position (and Reverse-Range Illumination) Switch Assembly Connectors, will follow later in this Thread.



From the time of the Original 4L60E Product release (In 1992 for the 1993 Model-Year) to the Current Products available (2022)...
There were many revisions/ updates and changes that would affect the appearance, the Part-Numbers, and the function of all of these Electrical Connectors.


I will be going over the 3 different types of External Electrical Connection...
and all of the changes that have occurred over the last 30-Years.
This will cover Appearance, Function, and Terminal Pin-out changes.

vorteciroc

The Main Electrical Connection uses Delphi Sealed Micro-Pack 100W 20-Way Electrical Connectors.


The Male Connector is a Case Pass-Through Connector...
As shown in the Image below:



and is part of the Internal Wiring-Harness for the Transmission:



The Female Connector is part of the Power-Train Wiring-Harness, that extends under the Vehicle to the Transmission.
Shown in the Image below:

vorteciroc

Most people, as well as the Members here...
Are more likely to spend time working with the Female Connector (of the Main Electrical Connection) than the Male Connector.
Obviously this is due to the fact that the Female Connector is external to the Transmission...
and the Male Connector is internal/ inside the Transmission.



For this reason, I will be going over the Female Connector first...
Again, this is a Delphi Sealed Micro-Pack 100W 20-Way Female Connector.
As shown in the Image below:




The next Image below, is of the Female Connector, in the form of a replacement Pigtail Assembly.
This Image shows the Original appearance of the 12-Wire Female Connector at the time of Initial 4L60E Release (In 1992 for the 1993 Model-Year):




This Connector used a Dark-Grey Colored Body, with a Green Colored TPA:



The Multi-Cable Seals could be Brown, or Green, or White, or even a Translucent skin-tone Color that was referred to as "Natural":



The Connector would most of the time also use a Black Conduit-Clip, where the Convoluted Conduit meets the Connector Body:


When Multi-Cable Seals that were used, that had more Holes than needed...
Blue Colored Terminal Dummy-Plugs would be installed to seal the unused Holes om the Multi-Cable Seal:




The following Part-Numbers are for the FIRST version of the FEMALE Main Electrical Connector that uses 12-Terminals:

-Connector Body with 12-Way Multi-Cable Seal Delphi: #12160492 (Obsolete, Discontinued and Replaced by New Part).
-TPA Delphi: #12160494 (Active, Current, However Color has been Changed from Green to Light-Grey/ White).
-Terminals Delphi: #12084912 (Obsolete, Discontinued and Replaced by New Part).
-Terminal Dummy-Plugs Delphi: #12129557 (Active, Current).
-Conduit Clip Delphi: #12176394 (Active, Current).



The FEMALE 12-Way Connector Pinout is shown below, as if looking at the FACE of the Connector...


NOT the back-side of the Connector, where the Multi-Cable Seal is located.



The GREEN Pin-Locations are where Terminals are installed... Black shows unused Pin-Locations:


The 12-Terminal Pin-Out was used for the 1993 and 1994 Model Years, with the appearance/ Colors shown for the Female Connector in this Post.



In 1995 a 13TH Terminal was added at the "U" Location (It was used for the addition of the PWM TCC Solenoid).
The 1995 through 2002 Model Years would use this 13-Terminal Pin-Out, with the appearance/ Colors shown for the Female Connector in this Post.


The following Part-Numbers are for the FEMALE Main Electrical Connector that uses 13-Terminals:

-Connector Body with 13-Way Multi-Cable Seal Delphi: #12160493 (Obsolete, Discontinued and Replaced by New Part).
-TPA Delphi: #12160494 (Active, Current, However Color has been Changed from Green to Light-Grey/ White).
-Terminals Delphi: #12084912 (Obsolete, Discontinued and Replaced by New Part).
-Terminal Dummy-Plugs Delphi: #12129557 (Active, Current).
-Conduit Clip Delphi: #12176394 (Active, Current).


From 2003 on, the Female Connector would change...

vorteciroc

It is very common for GM, ACDelco, and Delphi Parts to have their corresponding Part-Numbers changed, merged, or discontinued after a long period of time.
As such, many of the Original Part-Numbers for the Parts discussed here... have either changed, merged, or been discontinued.
I will be using current Part-Numbers for current Parts, and some Part-Numbers for Research/ History purposes ONLY.


The appearance of the Female Connector remained the same until the Early-2000s.
Around the 2003 Model Year, the appearance of the Female Connector would change to look as the Current Version does Today.


Current Updated appearance (2022):





This Connector used a Light-Grey/ White Colored Body, with a Light-Grey/ White Colored TPA:





The Multi-Cable Seals are most often a Light-Grey/ White Color:






The Connector would use a Light-Grey/ White Color Conduit-Clip:

When Multi-Cable Seals that were used, that had more Holes than needed...
Blue Colored Terminal Dummy-Plugs would be still be used:





The following Part-Numbers would be used (TODAY) to create a CURRENT version of the FEMALE Main Electrical Connector that uses 12-Terminals.
(NOTE: The more modern versions of the 4L60E, do NOT use 12-Way Connectors anymore... They use either 13, 15, or 17-Way versions):

-Connector Body with 14-Way Multi-Cable Seal Delphi: #13603407 (2 Holes need to be Plugged, so that 12 Terminals can be used).
-TPA Delphi: #12160494 (Color has been Changed from Green to Light-Grey/ White).
-Terminals Delphi: #15359002.
-Terminal Dummy-Plugs Delphi: #12129557
-Conduit Clip Delphi: #12110725




For the 13-Terminal Version of this Connector, all the same Parts (that are shown above) are used as the 12-Terminal Version less one Plug.

For both the 15-Terminal and 17-Terminal Versions, the Multi-Cable Seal needs to be replaced.



Delphi: #12191762 is the Multi-Cable Seal that can be used for 15-Terminal and 17-Terminal Versions.
It is a Multi-Cable Seal with all 20 Terminal Locations OPEN... Just plug-off the unused holes.
Additional Terminal Dummy-Plugs (Delphi: #12129557) would also be used.
Also try Part-Number 12034413; it is a taller Plug that I like better than the other Plug Posted.



The Delphi Sealed 20-Way Micro-Pack 100W Series Connection-System is a much larger System (Many more Connector Versions and Parts) than what was just used for the 4L60E Transmission.
This Connector Series was used for many different GM Electronic Automatic Transmissions starting in the 1990s and through the 2010s.
This Connector Series was for GM Corporate Front-Wheel Drive Trans-Axles, Rear-Wheel Drive Transmissions, as well as some of the Allison Model Transmissions.



Some Transmission Model examples are GM: 4T40E, 4T45E, 4T60E, 4T65E, 4T80E, 4T85E, 4L60E, 4L65E, 4L70E, 4L80E, 4L85E...
Allison: 1000 and 2000...
As well as several more Models that I have not mentioned...
The C5 and C6 Corvette Torque-Tube System also had there own dedicated Versions of the Delphi Sealed 20-Way Micro-Pack 100W Series Connectors.




The Female (External) Connector Bodies were produced in several different Versions and in different Colors.
Examples:




The Multi-Cable Seal for the Female (External) Connector Bodies, were produced in almost 30 different Versions and Colors.
Examples:




The TPA for the Female (External) Connector Bodies were produced in several different Versions (some in different Key-Ways) and in different Colors.
Examples:




There were also many different Terminal Location Pin-out Designs...
Different amounts of Terminals used (from 11 Terminals used, up to 20 Terminals used) and with the Terminals arranged in different Designs.
Examples:


The Image above does not show much Detail (Sorry I am not permitted to show more)...
However there are over 30 Different Pin-out Arrangements (15 of them are in the Image above).



Lastly, there were different Accessories used; like Terminal Dummy-Plugs, and different Conduit-Clips used.
Examples:

vorteciroc

As stated earlier, there are a few different Connector Pin-out arrangements for the different Model-Years of the 4L60E/ 4L65E/ 4L70E Transmission Family.


The GREEN Pin-Locations are where Terminals are installed... Black shows unused Pin-Locations.
The Pin-out arrangement for the 1993 and 1994 Model-Years is shown below (also shown in the Previous Post #2):





The Pin-out arrangement for 1995 through 2005 Model-Years, remains the same as the 1993 and 1994 Version...
But with the addition of 1 Terminal at Location: "U".

The use of Terminal Location "U" was for the addition of the PWM Control TCC Solenoid.
Pin-out arrangement for the 1995 through 2005 Model-Years is shown below:





The Pin-out arrangement for 2006 through 2008 Model-Years, remains the same as the 1995 through 2005 Version...
But with the addition of 2 Terminal Locations: "K" and "V".

The use of Terminal Locations "K" and "V" are for the addition of the Turbine Speed Sensor/ Input Speed Sensor (ISS).
Pin-out arrangement for the 2006 through 2008 Model-Years is shown below:





The Pin-out arrangement for 2009 and Newer Model-Years, is completely different from all previous Versions.
Pin-out arrangement for the 2009 and Newer Model-Years is shown below:


Sorry for the blank Chart/ Diagram... I am still working on it.
A completed Chart/ Diagram will be available soon.



Part of the reason that the Pin-out/ Terminal arrangements changed through the different Model-Years...
Is due to the Transmission Internal Wiring-Harnesses changing.
Parts and/ or Technology improvements also were reason for changes to have occurred.

vorteciroc

The Male Connector is a Case Pass-Through Connector, and part of the Transmission Internal Wiring-Harness.
Again, this is a Delphi Sealed Micro-Pack 100W 20-Way Male Connector.



Just as the Female Connector was produced for many different Model Transmissions...
in many different Versions, and in many different Color Combinations...
So was the Male Connector.


The Image below shows 3 of the 4 different Male Connectors (Bodies and TPAs) that were produced in 4 different Colors:






The next Image shows some of the different Versions of the TPAs produced.
Below shows some of the TPA Colors that were produced, out of the more than 30 Versions made to date:






It is important to know that the Internal Wiring-Harnesses changed several times through the Model-Years.
The Different Versions are:
-1993.
-1994.
-1995.
-1996 through 2002.
-2003 through 2005.
-2006 through 2008.
-2009 and Up.




From the first Model-Year (1993) of the 4L60E/ 4l65E/ 4L70E, through 2002...
The Male Connector appeared as in the Image Below:



As in the Image above; the Male Connector used a Dark-Grey Colored Body, and a TPA that is Colored Dark-Green and White.
A Green Colored O-Ring Seal also goes around the outside of the Connector Body.


The Part Numbers for the Male Connector are as follows:
-Connector Body Delphi: #12160781 (Active, Current).
-TPA Delphi: #12146394 (Active, Current, However Color has been Changed from Dark-Green and White to Tan/ Brown and White).
-Terminals Delphi: #12160551 (Active, Current).
-Seal O-Ring (Connector to Transmission Case) Delphi: #12129390 (Active, Current).





The Internal Wiring-Harnesses that used the Version of Male Electrical Connector in the 2 Images above were:
-1993 (a 1-Year ONLY Version).
-1994 (a 1-Year ONLY Version).
-1995 (a 1-Year ONLY Version).
-1996 through 2002.



At this time I do not have Images of the different Internal Wiring-Harness that were used from the 1993 Model-Year, through the 2002 Model-Year...
Except for the Version of the 1996 through 2002 Internal Wiring-Harness.
The other Versions, that I do not have Images for, are discontinued...
and the Aftermarket Versions of those Internal Wiring-Harness do not appear like the Original Versions did from Delphi.



The 1996 through 2002 Version of the Internal Wiring-Harness, is GM/ ACDelco: #24298353.
It is shown in the Image below:









For the 2003 Model-Year; the appearance of the Female Electrical Connector would change in color (to Light-Grey/ White).
Shown in the Image below, the New color (Light-Grey/ White) on the Left, and the previous color (Dark-Grey) on the Right:





The Male Connector also made the same Color change as the Female Connector.
The Image below shows the Male Connector Body Color to be Light-Grey/ White, Delphi: #13510422 (and NO longer Dark-Grey):



The TPA for this Version of the Male Connector also changed.
The previous Version of the TPA (Delphi: #12146394, Dark-Green with White Colors) was not used for this Version of the Male Connector.
Instead a New TPA was used, Delphi: #12146748 ...and had Medium-Green with Light-Green Colors.
The Image below shows the TPA used for this Version of the Male Connector:


As in the 2 Images above, the 2003 through 2005 Version of the Male Connector uses the Part Numbers which follow:
-Connector Body Delphi: #13510422 (Discontinued, Light-Grey/ White Color).
-TPA Delphi: #12146748 (Discontinued, Medium-Green with Light-Green Colors).
-Terminals Delphi: #12160551 (Active, Current).
-Seal O-Ring (Connector to Transmission Case) Delphi: #12129390 (Active, Current).



The Internal Wiring-Harness that used this Version of Male Electrical Connector in the 2 Images above was:
-2003 through 2005.


The 2003 through 2005 Version of the Internal Wiring-Harness, is GM/ ACDelco: #24234280.
It is shown in the Image below:

vorteciroc

For the 2006 Model-Year; the appearance of the Male Electrical Connector would change again.
This time, to the Color Black.


The Image below shows the Black Color Male Connector Body, Delphi: #13510422 (and NO longer Light-Grey/ White):




The TPA for this Version of the Male Connector actually changed back to the Original Part used...
However, the Color of this TPA was no longer produced in the Dark-Green and White Color.
The new Color for this TPA would be Tan/ Brown and White (but keep the same Part-Number as when it was Dark-Green and White).


The Image below shows this TPA (Delphi: #12146394) in the Early Color on the Left, and the Newer/ Late Color on the Right:




The Image below shows this TPA, as it is used for this Version of the Male Connector:




As in the 3 Images above, the 2006 through 2008 Version of the Male Connector uses the Part Numbers which follow:
-Connector Body Delphi: #15443076 (Discontinued, Black Color).
-TPA Delphi: #12146394 (Active, Current, However Color has been Changed from Dark-Green and White to Tan/ Brown and White).
-Terminals Delphi: #12160551 (Active, Current).
-Seal O-Ring (Connector to Transmission Case) Delphi: #12129390 (Active, Current).


The Internal Wiring-Harness that used this Version of Male Electrical Connector in the 3 Images above was:
-2006 through 2008.


The 2006 through 2008 Version of the Internal Wiring-Harness, is GM/ ACDelco: #24234121.
It is shown in the Image below:






For the 2009 Model-Year; the appearance of the Male Electrical Connector would change again.
This time, to the Color Blue.


The Image below shows the Blue Color Male Connector Body, Delphi: #13539169 (and NO longer Black):




The TPA for this Version of the Male Connector actually remained the same as the last Version of the Male Connector (Black, Delphi: #15443076).
The Tan/ Brown and White Color TPA is again Delphi: #12146394... and is shown again in the Image below:




As in the 2 Images above, the 2009 and Up Version of the Male Connector uses the Part Numbers which follow:
-Connector Body Delphi: #13539169 (Discontinued, Blue Color).
-TPA Delphi: #12146394 (Active, Current, However Color has been Changed from Dark-Green and White to Tan/ Brown and White).
-Terminals Delphi: #12160551 (Active, Current).
-Seal O-Ring (Connector to Transmission Case) Delphi: #12129390 (Active, Current).


The Internal Wiring-Harness that used this Version of Male Electrical Connector in the 3 Images above was:
-2009 and Up.


The 2009 and Up Version of the Internal Wiring-Harness, is GM/ ACDelco: #24237980.
It is shown in the Image below:

vorteciroc

I was not going to bother to include this, but o...well.
There is also one other (Rare/ Odd-Ball) Version of the Main Connector to go over.
Most likely you will never ever see it...


It was a very short lived Version (that was used for 1 to 2 Years) in C/K Trucks that had a 4L60E with a Hybrid-Electric 5.3L Engine.
This Version of the 4L60E Family Transmission, required the addition of an Electric-Pump.
The Electric-Pump would be in the Sump, to Pump the ATF when the Engine was off (in Hybrid-Electric Mode).


This Power-Train option was quickly replaced with a purpose-built Auto-Transmission (2ML Series: 2ML70) for Hybrid-Electric use for the 2007 Model Year.
The 2ML70 Automatic Transmission was a Partnership-Collaboration between GM, BMW, Chrysler, and Mercedes/ Daimler.
GM's previous Venture/ Collaboration with ZF Transmission for the GM 6L Family was quite successful (GM, Ford, BMW, VW/ Audi, Etc)...
and decided to go the route of another Collaboration for the 2ML70 Transmission.


The Image below shows the Male Connector Body Color to be Light-Grey/ White (the same as I have Posted earlier).
However the TPA, and the Pin-Out are unique to this Version of this Connector.
The TPA is a Yellow with Orange Color... and this Version uses 15-Terminals (NOT the same as the previous 15-Terminal Pin-Out):



As in the Image above, this Version of the Male Connector uses the Part Numbers which follow:
-Connector Body Delphi: #13510422 (Discontinued, Light-Grey/ White Color).
-TPA Delphi: #------------- (Discontinued, Yellow with Orange Color).
-Terminals Delphi: #12160551 (Active, Current).
-Seal O-Ring (Connector to Transmission Case) Delphi: #12129390 (Active, Current).



This Version uses a different 15-Terminal Pin-Out than previously seen.
The Pin-out arrangement for this Version is shown below:




This Version of the Internal Wiring-Harness, is GM/ ACDelco: #24241821.
It is shown in the Image below:




TBC... I am still hunting down Part Numbers, and Service Information.

vorteciroc

As I have previously mentioned in this Thread...

It is very common for GM, ACDelco, and Delphi Parts to have their corresponding Part-Numbers changed, merged, or discontinued after a long period of time.
As such, many of the Original Part-Numbers for the Parts discussed here... have either changed, merged, or been discontinued.

This further causes Fake/ Phony, Imitation Parts, that are Inferior (and at times even Un-Safe) to be produced.
Because some of the Electrical Connectors, that we have discussed...
are either discontinued/ unavailable or have had their appearance changed (does not look exactly like the Original Part)...
Plenty of "Knock-Off" or Cheap-Imitation Connector Parts exist.

The Image below shows a Terrible Chinese Phony Connector, that I have come across many times:


Often these Phony Parts will not fit-together properly, will leak ATF through the Connector, or may cause an Electrical-Short.
Just be careful of some of these Parts (many of which will claim to be "Original") when trying to save as much Money as possible.

vorteciroc

The VSS (Vehicle Speed Sensor) Connectors will be next...

QwkTrip

iTrader: (22)

This thread is awesome! Thank you for taking time to do this. I'm trying to absorb it and learn.

fuchs

Yeah, I'd like to thank you as well. This is some really good info in this thread. It actually took me quite a while to find out about the differences in 13 / 15 / 17 pin transmission layouts. I've been unfortunate to receive a 17-pin 2009+ transmission when I ordered a transmission for my swap, but maybe I could add some to the thread once it's bolted in and working.

vorteciroc

...Still in progress, Sorry.






NOTE:
Many Delphi Connectors are offered with a Pre-Installed Adhesive.
The Purpose of the Adhesive is to make the Electrical Connection Sealed, and Nigh-Permanent.
The Two Connectors above are offered with Adhesive, or without...
Each Version (pertaining to use of Adhesive) has a different corresponding Part-Number.

Most all Vehicles produced with this Style PNP-Switch, will have these Two Connectors installed with Adhesive.
Many unknowing People have attempted to remove these Connectors from the PNP-Switch... Only to break the Switch and Connectors.
Use of a Heat-Gun, has shown to often allow the removal of these Connectors without damage.

vorteciroc

TBC...

QwkTrip

iTrader: (22)

I actually just re-read it yesterday for new info.
It is appreciated!

QwkTrip

iTrader: (22)

For all the transmission shift solenoid valves (pins A, B, S), does the ECM switch to ground or switch to +12V ?

https://documents.holley.com/techlib...10555rev16.pdf

Holley has a problem with their pinout designations in the EFI wiring manual and I'm trying to figure out what is correct. The list of ECM J4 pinouts on Page 8 doesn't match the list of J4 pinouts in the trans wiring diagram on Page 41. They've got all the custom outputs jumbled up. Page 8 definitions would have the ECM switching to ground. Page 41 definitions would have the ECM switching to +12V. I have a feeling page 41 definitions are wrong and I need to substitute the Custom Output definitions from Page 8.

I have visually verified wire color codes match the 558-405 harness, except my harness doesn't have the J4-20 (orange wire, Sensors +5V reference) as shown in the schematic on Page 41.

QwkTrip

iTrader: (22)

I think I figured it out. Went into the software and set my ECM type to Dominator and turned on the trans config. Then looked at pin maps. Page 8 is correct and the harness schematic on Page 41 is wrong.

vorteciroc

Unless something has changed, Holley ONLY produces one J4 PCM Connector Harness for all Model-Years of the 4L60e/ 65E/ 70E, and 4L80E...
The Original Wiring for those 4 different Transmissions, between 1990 through 2012/ 2013; is NOT all the same.

I have never purchased or used one the Those Holley Harnesses for the Transmissions...
Maybe they expect you to re-Pin the Harness to fit your needs, dependent on which Model and Year Unit is being used.

QwkTrip

iTrader: (22)

We're all getting the power to do that with awesome threads like this.

vorteciroc

I can't believe that Holley gets away with Retailing Transmission Harnesses (Holley EFI) for $235.00 - $265.00.

Making them from scratch, I can not see myself charging more than $125.00 - $135.00 (at least to the Members here).
I have thought about selling my own Harness for Holley EFI (instead of having to do the installation as well).

LOL... It would be like a permanent 50% OFF Sale for Holley EFI Harnesses!

QwkTrip

iTrader: (22)

How much current passes through Pin E of the 20-way connector? This is the On/Off/Crank Voltage.
I have a Holley transmission harness and want to rip out the Holley fuse holder and relay and run wire from my own power source.

vorteciroc

This varies depending on the Internal-Harness, and Solenoids used (Model-Year and Sub-Model of Transmission).

Not very much though... 2.500A - 4.000A Continuous (Peak = 5.500A).
The terminals are ONLY rated for a Maximum Continuous Ampacity of 7.500 Amperes.


Holley EFI Transmission Harness...
YUUUUUCCCCCK!

QwkTrip

iTrader: (22)

Thank you!

Yeah, tell me about it. It's like a salvage job seeing what I can keep.

rhensley540

So idk what the **** I’m doin lmao. And I bought a trans thinking I got a good deal but got a feeling I’m screwed. I bout a 13 pin trans and I have a 17 pin trans. All this sounded like Chinese too me and looking for a answer maybe?

vorteciroc

Well I am not really certain what exactly is the issue that you have...
You really did not include any pertinent information.
What is the Year, Make and Model of your Vehicle?

I hate to assume, but based on your Post, I do not really have any choice...
You have a Vehicle that uses a 4L60E/ 65E/ 70E Family Transmission with a 17-Terminal Electrical Connector?
Now you purchased a 4L60E/ 65E/ 70E Family Transmission with a 13-Terminal Electrical Connector?

Does any of that sound correct?
Vehicles that have a Transmission with the 17-Terminal Version, can NOT use an Earlier Model Year Transmission with a 13-Terminal Connector...
Unless making multiple changes to the Vehicle.

rhensley540

09 Chevy Silverado 1500 and yea that sounds about right. I’ve heard you could use a 15 pin to a 17 pin but with the jump it had between it wouldn’t work.

rhensley540

What kind of changes would have to be made?

vorteciroc

The 2009 and Up Transmission differ from the Earlier Transmissions with the following:

-use a Pre-2009 Valve-Body and Manual-Valve.
-use a Pre-2009 External Transmission Wiring Harness.
-use a Pre-2009 Internal Transmission Wiring Harness.
-use a Fluid pressure manifold/ switch assembly.
-use a 3-2 Control Solenoid.
-use the Pre-2009 Manual Selector Shaft, Rooster-Comb, and Internal Parking Linkage.
-use an External Park/ Neutral and Reverse lights switch assembly.
-use External Wiring for the above Switch Assembly.
-use a PCM/ TCM for Pre-2009 Transmission.

signguy62

Great information. I have a question though. When it comes to transmission connections on the actual engine harness, are there any differences between a 2wd harness and a 4wd harness?
Will a 99-02 Silverado DBC harness from a 2wd, work for a 4wd setup?
Thanks!

vorteciroc

Two Wheel Drive and Four Wheel Drive Units can interchange the Wiring, as long as they fall within the Model Year groupings that I established earlier in this Thread.