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    Closed May 24th. No phone or email services during this time.

  • Standard order lead time for STANDALONE WIRING HARNESSES is estimated to be 9-11 weeks from date of purchase.

    Need is sooner? Give us a call to discuss expediting. Limited slots available.

    All other items typically ship within 3-5 business days unless specified otherwise.

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Home > Gen IV LS / Vortec Harnesses > Speartech Complete Harness Packages

Speartech Complete Harness Packages

All pricing shown is for our default harness layout which is a 42" long harness that originates off the passenger side rear head. Custom layouts are available for an additional fee. Call to order a custom layout harness.
If you're looking for a one-stop shop for your harness and its components, then buying a complete harness package from Speartech is the way to go.

Our harness packages include:
  • Speartech standalone wiring harness
  • Programmed Engine Control Module (ECM)
  • Programmed T42 Transmission Control Module (TCM) (if applicable)
  • Electronic Throttle Control (ETC) Pedal
We offer harness packages to those looking for a complete package to get up and running easily, at a discounted rate compared to buying each part separately.

We have been in the business for over 20 years perfecting the process of LSx harness building to ensure an accurate fit, quality appearance, and trouble-free operation. All harnesses are built in house, on an actual engine and test ran with a GM Tech 2 diagnostic scan tool hooked up to ensure proper functionality before shipping.



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