The Nations Starter AlternatorAD-270 SP series alternator fits all 1999-2006 Chevy Silverado pickup trucks with the 4.3L V6, and 4.8L, 5.3L, 6.0L Vortec V8 engines, as well as the 6.6L Duramax diesel engine. It is one of the best performing high output alternator upgrades for the underpowered stock charging system. It has no trouble handling high current demand accessories such as: extra lighting, snow plows, winches, high performance car audio systems, inverters, and televisions etc.

The Problem:

The original alternator that came with the vehicle was rated at 105 amps. However, this alternator only provides 70 amps at idle which is barely enough for your stock electrical system, let alone add on accessories.

The Nations Starter Alternator Solution:

The Nations Starter Alternator 270 amp SP series alternator allows for the vehicle to have 180 amps at idle versus the stock output, which will adequately provide your vehicle the power it needs most. At cruising speeds, the alternator will provide 270 amps of current for accessories you may want to run in your vehicle. Our alternators aren't just overwound stock alternator casings rebadged as "high output" alternators. Instead of following the competition and trying to squeeze the most our of a stock unit, we engineered our own large case alternator that weighs 6 pounds heavier than the stock 105 amp alternator. Unlike an over-wound stock alternator, our special AD series alternator is capable of safely producing large amounts of current for long periods of time without failure for increased peace of mind.

Questions?  Call 1-888-334-2632