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Xmas Gift Idea 2005-2006 Gmc Envoy 5.3l 250-320-370-400amp High Output Alternator Satisfaction Guaranteed [zLE3jn5k]

$57.99 $185.99 -69%

Fitment: This is a direct fit high-output alternator for the 2005-2006 GMC Envoy 5.3L. Being a direct fit, this alternator fits directly into your stock alternator location. Plug: This high-output alternator comes with a factory style plug so that yo

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Xmas Gift Idea 2005-2006 Gmc Envoy 5.3l 250-320-370-400amp High Output Alternator Satisfaction Guaranteed [zLE3jn5k]

Fitment:

This is a direct fit high-output alternator for the 2005-2006 GMC Envoy 5.3L. Being a direct fit, this alternator fits directly into your stock alternator location.

Plug:

This high-output alternator comes with a factory style plug so that your OEM plug will plug directly into the alternator. Therefore, with an OEM style regulator, it will have a factory voltage set point.

NOTE: If you require charging at a certain voltage setpoint, we offer a selection of different voltage regulators that you will need to purchase with the alternator for it to be installed. View our Regulator Options Here.

Pulley:

This alternator also comes with a smaller pulley, which causes it to spin faster than a larger pulley. This can help the alternator produce its maximum output. With a smaller pulley, it is required to install a 1/2" - 1" shorter belt.

See this Blog Article for assistance in finding the correct shorter belt.

Big 3 Wiring:

When Upgrading to a High-Output Alternator, it is required to upgrade your wiring with the Big 3 Wiring Upgrade Kit. It is recommended to use 1/0 100% copper wires for the upgrade. Our Big 3 Wiring Upgrade Kit is 10% off with a purchase of a JS Alternator; use code BIG3DISCOUNT at checkout.

Learn Why The Big 3 Wiring Upgrade Kit is Required for All High Output Alternators

What Our Customers Say

January 18, 2026

Absolutely no complaints!

A very functional and truly intelligent design.

- Julie K..

January 18, 2026

Absolutely no complaints!

The performance is really exceptional.

- Andrew N..

January 18, 2026

Absolutely no complaints!

It's a great product, and I truly love it.

- Ruby Y..

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