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Holley EFI

GM PWM Alternator Harness

Part # 558-475

For use with 2007+ PWM GM Alternators.

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GM PWM Alternator Harness

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Free Shipping on orders over $149*
$92.75
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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
  • 2007+ PWM GM alternators
  • Use with late model OEM alternators
  • Include detailed instructions for installation and 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
CategoryElectrical, Charging and Starting
Connector ColorBlack
Emission Code5
Grade TypePerformance
Part TypeAlternator Harness
Product TypeHarness
Sub CategoryAlternator / Generator and Related Components
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 - 199r12368.pdf
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Holley EFI
GM PWM Alternator Harness
For use with 2007+ PWM GM Alternators.
Part# 558-475
$92.75

*Free Shipping and 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.

GM PWM Alternator Harness
GM PWM Alternator Harness
$92.75