The Nations Starter Alternator XP Series 275 Amp alternator is a LARGE case alternator designed to fit all 2001-2005 Cadillac Deville and Seville cars with the 4.6L Northstar engine.

The original Denso alternators found on these trucks were rated at 150 amps and only make 100 amps at idle! The DC Power 275XP series alternator cranks out an astounding 190 Amps at IDLE! With this alternator you are gaining an incredible 90 amps of extra output, at idle, and 125 amps at cruising speeds! The 275 XP series alternator is the overall best performing alternator at idle we make, and produces an unbelievable 75% of its rated output at idle! If you need lots of power for a big system in your Cadillac, this is the meanest alternator you can get! There isn’t another alternator like this that will deliver this kind of output at ALL speeds! When you need all the power you can get for your car, especially at idle, this alternator is the best you can get!

All XP series Cadillac alternators have our exclusive USA made and super efficient, heavy duty stator windings that gives our alternators their incredible low speed output and also lets the alternator run much cooler than other stator windings and deliver unmatched performance!

With this alternator you have our guarantee that it will:

• The highest idle output alternator we make.


• Be a Direct Bolt on OEM fit with no modifications necessary for easy installation!


• Give you EXTREME performance at idle, 200 Amps!


• Is compatible with the PCM for worry free, NO trouble code installation.


• Built from 100% BRAND-NEW USA made parts!


• Fits ALL 4.6L Northstar V8 engines from 2001-2005


• Comes with Extreme duty rectifiers that feature an incredible TWELVE, 40 amp diodes in super efficient aluminum heat sinks for optimal current transfer and optimum heat dissipation under high heat, high output situations resulting in better outputs and longer life.


• The best High- Amp replacement alternator available anywhere, sold at a competitive price and backed up with a full 2 Year replacement warranty!