A-Premium 12V 105A Alternator for GM Trucks & SUVs — 6-Groove Pulley, Clockwise Rotation, 4-Pin

The A-Premium 12V 105A alternator is a direct-replacement, clockwise-rotation charging unit with a 6-groove pulley designed for select GM trucks and SUVs that use a 4-pin electrical connector.

This remanufactured alternator matches factory specifications for voltage, amperage and pulley configuration to restore charging performance on compatible vehicles. It’s engineered to be a straightforward swap for owners and mechanics who need a reliable replacement that fits vehicles listed in the fitment details. Confirm the part number and your vehicle’s connector type before ordering to ensure proper compatibility.

Will this alternator fit my truck or SUV?

Compatibility depends on model year, engine application and connector style. This unit fits many Chevrolet and GMC full-size trucks and SUVs from late-1990s through mid-2000s, but only vehicles using a 4-pin electrical connector. Double-check the reference numbers and your vehicle’s connector type prior to purchase.

• Fits select Chevrolet: Silverado 1500/2500 (1999–2004), Silverado HD models (2001–2005), Avalanche 1500/2500 (2002–2004), Suburban/Tahoe (2000–2004).
• Fits select GMC: Sierra 1500/2500 (1999–2004), Sierra HD 2001–2003, C3500HD and Sierra HD/3500 (2001–2005), Yukon/Yukon XL (2000–2005).
• Also for Cadillac Escalade 2002–2004, Escalade ESV/EXT 2003–2004 and van models Astro/Express and Safari/Savana 2001–2004 where specified.
• Not compatible with 2-pin connectors or certain 1500-series 2005+ models—verify before purchase.

What electrical and mechanical specs should I expect?

This alternator provides 12 volts and 105 amps output with a clockwise rotation and a 6-groove pulley. It uses four electrical terminals and is supplied new, meeting the listed reference numbers for cross-checking. These specs ensure matching belt alignment and output for systems designed around a 6-rib pulley and 105A charging capacity.

• Voltage: 12V — compatible with standard automotive electrical systems.
• Output: 105A — suitable for factory electrical loads on listed models.
• Rotation: Clockwise (CW) — matches OEM rotation direction.
• Pulley: 6-groove — compatible with 6-rib serpentine belts.
• Terminals: 4-pin connector — confirm your vehicle uses a 4-pin plug.

How do I verify part compatibility and install this alternator?

Start by comparing the part numbers and connector count to your existing alternator. Use the reference numbers provided to cross-check compatibility, inspect the pulley groove count and wiring plug, and if in doubt, consult a repair manual or a professional installer. Installation typically involves disconnecting the battery, removing the drive belt, unbolting the old alternator, swapping over any brackets or sensors, and reconnecting wiring.

• Reference numbers: 8247N, 8247, 112850, 10480388, 10464438, 19244727, 8273, 8291.
• Inspect your alternator: confirm 4-pin connector and 6-rib pulley alignment.
• Basic install steps: disconnect battery, remove belt, unbolt old unit, install new alternator, reconnect wiring and belt tension.
• Seek professional help if unsure about electrical testing or mounting brackets.

Who is this for? This A-Premium alternator is aimed at DIY mechanics, independent repair shops and fleet owners who need a direct-fit replacement for late-1990s to mid-2000s GM full-size trucks and SUVs that accept a 4-pin, 6-groove, clockwise alternator. It’s a practical option when you want a unit that matches OEM mounting, pulley and electrical specifications and is backed by a one-year unlimited-mileage guarantee from A-Premium.