COVID-19 Update: Our website offers seamless ordering anytime, and with the exception of business critical personnel, the majority of our customer service, call center sales staff marketing and related support are officially connected and working from home as of Monday, March 30, 2020. Like most fulfillment centers, you’ll likely experience some delays in shipping, as our Warehouse team is running at reduced capacity. We are continuing to take extra precautions with additional cleaning and sanitization in our fulfillment center. With the new government guidelines in place, we hope to be back to normal sometime in May. For additional details, click here. Show More… Show Less…
  • As seen on
Scroll to Top


Wiring Harness, Internal Regulator Conversion, 1963-72 GM

Vehicle Specific fits 16 models
18 Reviews
Part# 27555
You Save $4.96
In Stock
available for immediate delivery

Convert your external regulator to internal

This harness is necessary when converting to an internally regulated alternator.


WARNING: This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

Vehicle Fitment

Make & Model Year Range Application Details
Buick Riviera 63-76
Buick Skylark 64-72
Cadillac Calais 54-64
Cadillac DeVille 54-72
Cadillac Eldorado 54-72
Cadillac Fleetwood 54-72
Cadillac Series 62 54-64
Cadillac Series 65 54-64
Chevrolet Chevelle 64-72
Chevrolet Corvair 65-69 Corvair
Chevrolet El Camino 64-72
Chevrolet Monte Carlo 70-77
Oldsmobile Cutlass 64-77
Pontiac GTO 63-70
Pontiac LeMans 63-70
Pontiac Tempest 63-70
  • Have a Question? Chat with an Expert or Call 1‑800‑243‑8355
    Mon-Fri 7:30am-5pm | Sat 10am-3pm PT Experts are currently offline
  • Low Prices. Price Match Guarantee
  • Car Part Experts. We know car parts
  • Guaranteed Fitment. 100% factory accurate
  • Superior Selection. Largest selection of in-stock parts

Reviews (18)

Wiring Harness, Internal Regulator Conversion, 1963-72 GM
M&H Wiring Harness, Internal Regulator Conversion, 1963-72 GM