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GM Genuine Parts Generator
OE
Pack of 1

GM Genuine Parts Generator

GM Part #42842358

ACDelco Part #42842358

MSRP$422.64*

GM Genuine Parts Alternators are designed, engineered, and tested to rigorous standards, and are backed by General Motors.

  • Newly manufactured as an exact replacement for your GM vehicle's original alternator
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors

Pack of 1

About this product

GM Genuine Parts Alternators are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These alternators provide power to the vehicle's electrical systems and charge the battery while the engine is running. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Warning WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

  • Newly manufactured as an exact replacement for your GM vehicle's original alternator
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • GM regularly updates production and service part designs to integrate new materials and technologies

Pulley Belt TypeSerpentine
Terminal Quantity3
Distance Between Mounting Feet5.45 in / 138.55 mm
Outside Pulley Diameter2.56 in / 65 mm
Case Circumference5.63 in / 143 mm
ClassificationOE
Drive End To Pulley 1st Groove Distance2.86 in / 72.74 mm
Pulley Groove Quantity5
Pulley IncludedYes
One Wire CapableYes
Mounting TypeFront Mount
Plug Type365
Decoupled Or Clutch PulleyYes
External Regulator IncludedNo
Case MaterialAluminum
Case ColorNatural
Plug Clock Rear View Main Mounting Ear at 6 O Clock1
Regulator TypeInternal
Ground TypeNegative
FinishUncoated
External Fan IncludedNo
AC Service TapNo
Fan TypeInternal
Rotation DirectionClockwise (Right)
Voltage12DC
Amperage Rating156A
Grade TypeStandard Replacement

24 Months/Unlimited Miles Limited Warranty for Parts (plus Labor if installed by a GM dealer)

Please visit our warranty page on Gmparts.com for full warranty details.

ModelBody StyleTrimYear(s)
CT5V Blackwing2025, 2026