My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Tuff Stuff Performance 7127D GM Alternator 100 Amp 1-Wire 3-Wire Universal

(GMC G2500 1979-85, 1987, K1500 1979-85, C1500 1979-85, K2500 1979-85, Jimmy 1973-85, C3500 1979-85, K2500 Suburban 1979-85, K3500 1979-85 + 130 more models)

Manufacturer

Picture for manufacturer Tuff Stuff Performance

Part Number

7127D
20 reviews
Sale Price

$140.75

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Tuff Stuff Performance 7127D is a high-output 100-amp alternator designed for GM-style applications. Featuring a durable as-cast finish, this alternator combines classic styling with modern performance for street rods, muscle cars, and custom builds.

Key Features:

  • 100-amp output provides reliable power for stock and modified electrical systems
  • Internal voltage regulator eliminates the need for external regulation components
  • Dual wiring capability: functions as either 1-wire (self-exciting) or traditional 3-wire configuration
  • GM-style mounting and pulley configuration for universal fitment
  • As-cast finish offers authentic appearance for period-correct restorations
  • Compact design fits tight engine bay spaces

The 1-wire capability simplifies installation by eliminating the need for an ignition wire connection—the alternator self-excites once engine RPM reaches approximately 1200. The 3-wire option allows traditional wiring for applications requiring charging at idle or dash-mounted warning lights. This versatile alternator is an excellent upgrade for vintage GM vehicles and custom applications requiring dependable charging performance.

Products specifications

Fits

GMC G2500 1979-85, 1987, K1500 1979-85, C1500 1979-85, K2500 1979-85, Jimmy 1973-85, C3500 1979-85, K2500 Suburban 1979-85, K3500 1979-85, C15/C1500 Pickup 1973-74, Safari 1985, C2500 1979-85, K1500 Suburban 1979-85 + 126 more models

Finish

As Cast

Warranty

Y

MULTIPLE PACKAGES

N

SHIPPING RESTRICTIONS

N

WARRANTY DESCRIPTION

Limited 1 Year

Prop 65

WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Amperage

100 AMP

Website easy to navigate

Great price

I hope that the copper gaskets really seal.

Easy

A few clicks, input some info and the part is on the way! Great so far!

Quick delivery.

Great prices

This is the first time I ordered from Autoplicity. Very good experience overall. The prices are the best I can find anywhere online. It was shipped very quickly, and I received my item just in time before my trip. Thanks!

I ordered my K&N cold air intake order number 17133<br>From autoplicity for almost half price compared to other sites online. I will continue my purchases here n stop my searches elsewhere. And delivery time is fast!

ALL SHOPPING SHOULD BE THIS EASEY

Ordered the Auto Ventshade Ventvisor Deflector 4 pc. (Model 94856) for my 2000 Toyota Camry XLE. Was easy to install with no tools, just use the included strong double sided adhesive tape. Instructions that came with it could've been more detailed on where exactly to install the ventshade as I had to remove them tediously, realizing I had to put them a little higher. Also, there seems to be an unsightly gap between the front and back windows. Works as designed. Satisfied with product. Fast shipping by Autoplicity.

Quick and easy, with good price

Smooth process thus far

Good And Quick

I ordered a windshield wiper fluid reservoir. It came on time and was the product I needed. It fit perfectly and works great.

very good price and prompt shipping. good choice of merchindise<br>to chose from. helpful in finding the correct item.

GREAT PRICES FAST SHIPPING WILL UPDATE ONCE PRODUCT ARRIVES

So far so good!

Shopping was quick and painless. Also the prices are very competitive.

Best Price i could find for some nice foglamps. easily navigable website.

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy