Description:

Upgrade your GM truck’s electrical system with the powerful combination of the Mechman 24-Volt Alternator and their Dual Bracket Kit for 1999-2013 GM 4.8L/5.3L/6.0L engines. The 24 Alternator is engineered for continuous-duty high output, and easy integration. The Dual Bracket kit complements this perfectly by providing a heavy-duty, zinc-coated bracket assembly with all necessary spacers and idlers, designed to perfectly align dual alternators on GM Vortec mounts to minimize belt wear and preserve access to power steering service points. Together, they deliver a turnkey solution for off-grid systems, auxiliary power setups or high-demand truck applications—offering seamless compatibility, robust construction and real-world reliability.

24-Volt Alternator | D202-8237080-24V

This alternator provides adaptive charging control and simplified integration. The GM Vortec-style frame provides easy fitment in multiple aftermarket bracket applications.

The 24V alternator delivers dependable high-output power for auxiliary power systems and performance builds. Designed for continuous-duty operation, it provides reliable charging under demanding conditions. 

• Fits: GM Vortec & Duramax trucks as well as aftermarket dual bracket kits designed for GM Vortec alternators.
• Direct-Fit Design: GM Vortec mount ensures compatibility with many factory and aftermarket brackets.
• High-Output Capability: Built to deliver continuous amperage for 24V systems.
• Reliable Performance: Stand-alone alternator with built-in voltage regulation set at 28 V for consistent system charging.
• Simple Control: Can be turned on and off using either a 12-volt or 24-volt ignition source.
• Includes: Alternator & H124 Harness
• Complete Kit: Designed for simple integration into 24-volt charging systems.
  Perfect for light commercial, auxiliary, and custom 24-volt power applications.
• Complete Kit: Alternator, regulator, and accessories for plug-and-play installation.

Popular applications for 24 volt systems include:

• Charging off-grid 24 volt solar battery banks
• Heavy-duty trucks and equipment
• RV house bank charging
• DIY off-grid power generation
• Industrial equipment
• Mobile electric air conditioning and refrigeration

⚠️ Customer Responsibility: It is critical that the customer confirms the generic profile matches their battery requirements. Refer to the image below and your battery manufacturer’s specification sheet before installation. Mechman will not be responsible for issues caused by a mismatch.

Bracket Kit:

After years of research and revisions, and thousands of miles of real-world testing, Mechman is proud to offer the most complete and functional dual alternator system available for 1999-2013 GM LS truck engines. This kit is designed with function and durability in mind with maximum belt rap, and perfect belt alignment for minimized belt slip and belt fatigue. We have also engineered the system such that you still have easy access to your power steering pump reservoir for fluid service. These kits come complete with alternator(s) and belt to take all the guess work out of the installation. Our highly detailed color instructions ensure a quick install, possible with standard hand tools. Mechman dual alternator kits include 6-phase series alternators, featuring massive twin rectifiers with 12 huge diodes for maximum durability in daily driven vehicles.

Note: This kit is intended for use with your factory alternator only in its original spot. The belt included has been appropriately sized for this.

Fitment Guide:

File: INSTR-H124.pdf