Replacement Alternator 12V for Chevy Express 2500

Car alternator replacement restores stable 12V charging power to help fix hard starts, battery warning lights, and dimming electronics. Built for OE-style fitment on select Chevrolet and GMC vehicles, it connects to factory wiring and mounts for a clean install. A 6-groove pulley supports steady, non-slip drive up to 6000 RPM, while an aluminum housing and pure copper flat coil help manage heat and conductivity for dependable daily use.

• Fits select Chevrolet Express 2500 (2018–2019) and GMC Savana 2500 (2018–2019) engines listed in specs


• Delivers efficient 12V DC output to support ignition, lighting, audio, and onboard electronics


• Maintains grip with a 6-groove pulley designed for stable drive up to 6000 RPM


• Resists heat with copper coils and an aluminum housing plus cooling fan for better dissipation


• Replaces multiple OE reference numbers for easier cross-check before purchase

If your vehicle shows low-charge symptoms—slow cranking, flickering lights, warning indicators, or intermittent accessory issues—this alternator replacement is a direct way to restore charging performance without guesswork. Match your engine and OE reference number list before ordering, then install using existing factory connections for a straightforward swap. Keep a spare on hand for fleet or work vans to reduce downtime and stay ready for the next start. Grab yours today.

• Output: 12V DC


• Pulley: 6-groove; up to 6000 RPM


• Material: Aluminum housing; pure copper flat coil


• Dimensions: 6.1 x 6.5 x 6.5 in (155 x 165 x 165 mm)


• Weight: 12.8 lb (5.8 kg)


• Vehicle fitment (examples): Chevrolet Express 2500 2018–2019 V6 4.3L / V8 6.0L; GMC Savana 2500 2018–2019 V6 4.3L / 6.0L


• OE reference numbers: 23487088, 23487089, 84143542, 84143543, TN1042119110, TN104211-9110, TN1042119720