The 4L60E has been produced since the early 90’s. While retaining the same basic gearing, it has undergone some design changes from time to time. It’s important to understand that when selecting a new internal or external wiring harness for it, since the harness didn’t stay the same for every year.
Make Sure the Harness Fits
Before committing to a parts purchase, make sure that the 4L60E Transmission harness that you are looking at fits. This can be easily achieved after you click on the one you are interested in buying, you’ll just add the vehicle you are working on in the box and it’ll tell you.
4L60E Internal Wiring Harness
If you aren’t sure what exact year your transmission is you can visit the 4L60E Identification page to help you out exactly what transmission. The internal harnesses are broken up into two groups, pre 2002 and post 2002. Make sure you are getting the right one before you check out.
1993-2002 4L60E Internal Wiring Harness
The first 4L60E used the same internal wiring harness for about 10 years. This harness fits 1993-2002 model years.
2003-2007 4L60E Internal Wiring Harness
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specification for fit, form, and function
4L60E External Wiring Harness
The external wiring harness for a 4L60E will need to be spliced into the main wiring harness. It’s not that difficult to do, just make sure that you solder it in and cover it with heat shrink.
- Real brand name components
- crimped with professional tooling
- secondary Locks installed and/or included where applicable