Skip to main content
Spring Cleaning Sale - Big Savings!
Motor Life Events Community Support
ASK OUR EXPERTS
1-866-464-6553
Holley EFI

GM PWM ALTERNATOR HARNESS

For use with 2007+ PWM GM Alternators

Part # 558-475

GM PWM ALTERNATOR HARNESS

In Stock
Free Shipping on orders over $150*
$67.60
Add to Wishlist
5

Emissions

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

See Emissions Details

Also Bought

Plug and play Holley EFI alternator harnesses for late model engines with Pulse Width Modulated alternators. This includes most 2007+ GM engines and most 2005+ Ford engines.

Features:

  • Plug and play with Holley EFI and Terminator X Main Harnesses
  • Designed for use with Late Model OEM alternators
  • Include detailed instructions for software configuration

About Holley EFI

Find standalone EFI for LS, Coyote, Hemi and more at Holley.com. From engine swapping to managing up to 4000 horsepower, we have a solution for every project!

Brand Holley EFI
Emission Code5
Product TypeHarness
UPC090127142301
Part Number558-475
5

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.
Instructions for Part# 558-475

*Free Shipping & Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

Some parts are not legal for use in California or other states with similar regulations.