High Output Alternator for Chevrolet SSR Trailblazer SS (2005-2006) 6.0L

Direct-Fit 250A High Output Alternator for 2005-2006 Chevrolet SSR, Trailblazer (GMT360/GMT368)

What it Does: The 250A High Output Alternator replaces the factory 145-amp charging unit on 2005-2006 Chevrolet SSR and Trailblazer SS models to eliminate electrical voltage drop under heavy accessory and idle loads.

The Stock Chevrolet SSR, Trailblazer Charging Limitation

Factory GM AD244 145-amp alternators struggle to maintain sufficient system voltage on LS2-equipped GMT360 and GMT368 platforms when supporting aftermarket audio, auxiliary lighting, or high-draw electric cooling fans. Under prolonged idle and engine bay heat soak, standard round-wire stators experience thermal resistance buildup, dropping output below 13.0 volts. This voltage depression leads to dimming instrument clusters, premature battery degradation, erratic sensor readings, and delayed starter cranking.

The Engineering Solution

Constructed with a heavy-gauge copper hairpin stator, this unit delivers an immediate 150 amps at idle and a sustained 250-amp peak output. The hairpin architecture dramatically decreases internal electrical resistance and manages thermal dissipation under heavy current demands. Equipped with dynamically balanced rotors, heavy-duty sealed bearings to withstand sustained high-RPM operation, and an internal solid-state voltage regulator, it maintains a steady 13.5 to 14.5 charging voltage. It bolts directly to the factory bracket and connects to the OEM harness plug without modification.

What's Included

• 1x 250 Amp High Output Alternator (Part # 8299)

Technical Specifications

Compatibility

• 2005-2006 Chevrolet SSR 6.0L V8
• 2006 Chevrolet Trailblazer SS 6.0L V8

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT360/GMT368 SSR, Trailblazer?

Yes, this is a direct fit for the 2005-2006 Chevrolet SSR and Trailblazer equipped with the LS2 6.0L V8 engine using OEM mounting positions.

Do I need to upgrade my factory wiring to run this 250A alternator?

While the unit plugs into the stock harness, upgrading the main battery charging lead and engine grounds to 1/0 or 4-gauge wire is strongly recommended to safely carry full 250-amp loads.

The Chevrolet Performance Caliber

Engineered for high-displacement GM muscle trucks and SUVs, this heavy-duty charging solution ensures sustained electrical stability whether running high-draw accessories in commuter gridlock or commanding full throttle on the track.