The Tuff Stuff 7127D is a 100 amp GM alternator on the Factory Cast PLUS platform. It uses a 12V, 1-wire self-exciting circuit and a single V-belt pulley, fitting GM accessory drives that run a V-belt. The aluminum case is left in a natural finish.
- Type: Alternator, Factory Cast PLUS
- Output: 100 amps, 12V
- Wiring: 1-wire self-exciting
- Pulley: single V-belt
- Case: aluminum, natural finish
- Application: GM
- Part number: 7127D
FAQ
What is the output of the 7127D?
It produces 100 amps at 12 volts.
Does the 7127D need an external regulator?
No. It is a 1-wire self-exciting alternator with the regulator built in.
What belt does this alternator use?
It uses a single V-belt pulley.

