05-13 GM Trucks/SUV's Includes Three Alternators - CAST

Triple Alternator Kit for 2005–2013 GM LS-Based Trucks & SUVs (Cast)

Includes:

• Triple Alternator Bracket Assembly
• Custom-Length Belt
• (3) Cast 8302400 Alternators

Unleash Maximum Charging Power

Built on the proven foundation of our dual alternator system, this all-new triple alternator kit delivers unmatched power, durability, and performance for high-demand applications. Engineered specifically for LS-based 2005–2013 GM trucks and SUVs, it’s the only system on the market that mounts all three alternators in a single plane across the top of the engine, offering superior aesthetics, efficiency, and heat management.

Precision Design, Maximum Grip

Unlike basic brackets that simply hold alternators in place, this system features strategically placed idler pulleys to optimize belt wrap and maximize grip under extreme electrical loads. Whether you’re running massive amplifiers, show-stopping lighting, or demo fans, you get no slip, no dust—just raw charging power.

Quick, Easy Belt Adjustments

Featuring our exclusive Square-Lock Adjuster Slot, tensioning your belt is as easy as loosening a single bolt with a socket. Slide, adjust, and lock—no more fighting with wrenches behind the bracket.

Real-World Proven

Tested under brutal daily conditions with 400A–600A+ loads, this kit has shown zero belt walk, zero belt dust, and zero contact issues. Even at wide-open throttle, belt chirp is nearly eliminated—only a minor chirp at worst during hard shifts from a dead stop.

Ideal for:

• High-power car audio systems
• Show builds with cooling fans and lighting
• Daily-driven vehicles needing serious amperage

Fitment Guide:

Note: Will not work on some Chevrolet Avalanches. Please contact customer service before trying to order.

Main Assembly Instruction Manual
File Name: INSTR-D300.pdf