Part #: 12578

Remy 12578 Alternator

Premium Remanufactured
⚙️ 14 vehicles fit this part
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Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Premium Remanufactured
🚗Fitment: Chevrolet, GMC, and Isuzu, Colorado, Canyon, i-280, and i-350
🔄Easy Returns — Return within 60 days for a full refund
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Reliable Alternator for Chevrolet, GMC, and Isuzu Vehicles

The Remy Premium Remanufactured Alternator 12578 is designed to restore your vehicle's charging system with dependable performance. Engineered for select Chevrolet Canyon, Colorado, GMC Canyon, Colorado, and Isuzu i-280 and i-350 models, this alternator meets strict remanufacturing standards to ensure consistent power delivery.

  • 100 Ampere output for stable electrical performance
  • Internal fan type for efficient cooling
  • Remanufactured to original equipment specifications
  • Includes pulley for straightforward installation
  • Clockwise rotation direction compatible with specified vehicles
  • 12 Volt system with internal voltage regulator
  • OE Manufacturer: Valeo

About the Premium Remanufactured Product Line

The Premium Remanufactured line by Remy offers alternators that have been carefully rebuilt to meet or exceed original equipment standards. This process includes thorough inspection, replacement of worn components, and testing to ensure reliable operation. The 12578 alternator benefits from this rigorous remanufacturing process, providing a cost-effective alternative to new parts without compromising quality.

Product Details and Specifications

This Remy alternator features a 100 amp amperage rating suitable for the electrical demands of Chevrolet Canyon, Colorado, GMC Canyon, Colorado, and Isuzu i-280 and i-350 models. The internal fan design helps maintain optimal operating temperatures, while the internal voltage regulator ensures consistent voltage output. The included pulley and clockwise rotation direction match the original equipment setup, simplifying replacement and ensuring compatibility.

Common Applications and Issues Addressed

  • Restores charging system functionality in Chevrolet, GMC, and Isuzu trucks
  • Replaces alternators with insufficient amperage output
  • Solves battery drainage caused by faulty voltage regulation
  • Addresses overheating issues due to fan failure
  • Resolves pulley or rotation direction mismatches in replacement parts

Installation Notes and Tips

Before installation, verify vehicle compatibility with Chevrolet Canyon, Colorado, GMC Canyon, Colorado, or Isuzu i-280 and i-350 models. Ensure the alternator's clockwise rotation and included pulley match your vehicle's original specifications. Disconnect the battery prior to removal and installation to prevent electrical shorts. Use proper torque settings on mounting bolts and confirm all electrical connections are secure for optimal performance.

Quality Assurance and Warranty

The Remy Premium Remanufactured Alternator 12578 undergoes comprehensive testing to meet original equipment standards. Manufactured by Valeo, this alternator is built to provide reliable service life. Warranty coverage details should be confirmed with the distributor or installer, as they may vary by region.

BrandRemy
Part Number12578
PositionPremium Remanufactured
Amperage Rating100
Fan TypeInternal
New or RemanufacturedRemanufactured
OE ManufacturerValeo
Pulley IncludedYes
Rotation DirectionClockwise
Voltage (V)12
Voltage Regulator TypeInternal

This part fits 14 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2006ChevroletColorado3.5LL5N/A100 Amps, fits various alternator models.; Premium Remanufactured
2006ChevroletColorado2.8LL4N/A100 Amps, fits various alternator models.; Premium Remanufactured
2006GMCCanyon2.8LL4N/A100 Amps, fits various alternator models.; Premium Remanufactured
2006GMCCanyon3.5LL5N/A100 Amps, fits various alternator models.; Premium Remanufactured
2006Isuzui-2802.8LL4N/A100 Amps, fits various alternator models.; Premium Remanufactured
2006Isuzui-3503.5LL5N/A100 Amps, fits various alternator models.; Premium Remanufactured
2005ChevroletColorado3.5LL5N/A100 Amps, fits various alternator models.; Premium Remanufactured
2005ChevroletColorado2.8LL4N/A100 Amps, fits various alternator models.; Premium Remanufactured
2005GMCCanyon2.8LL4N/A100 Amps, fits various alternator models.; Premium Remanufactured
2005GMCCanyon3.5LL5N/A100 Amps, fits various alternator models.; Premium Remanufactured
2004ChevroletColorado3.5LL5N/A100 Amps, fits various alternator models.; Premium Remanufactured
2004ChevroletColorado2.8LL4N/A100 Amps, fits various alternator models.; Premium Remanufactured
2004GMCCanyon2.8LL4N/A100 Amps, fits various alternator models.; Premium Remanufactured
2004GMCCanyon3.5LL5N/A100 Amps, fits various alternator models.; Premium Remanufactured

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

15831639897241516097241516SG10S039SG10S049SG10S051

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.