GM Genuine Parts Engine Oil Cooler
OE
Pack of 1

GM Genuine Parts Engine Oil Cooler

GM Part #40009478

ACDelco Part #40009478

MSRP$140.90*

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

  • Helps maintain proper engine oil operating temperatures
  • 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 Engine Oil Coolers are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These coolers are heat exchangers that help transfer heat to and from your vehicle's engine oil, the engine coolant, and ambient air. This helps keep the engine oil temperature within the designed operating range, which helps optimize engine efficiency and longevity. 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).

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  • Helps maintain proper engine oil operating temperatures
  • 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

Mounting Hardware IncludedNo
FinishAluminum
ColorNatural
Core MaterialAluminum
Length7 in / 176 mm
Width4 in / 114 mm
ClassificationOE
Inlet Outside Diameter1 in / 22 mm
Thickness5 in / 121 mm
Outlet Outside Diameter1 in / 22 mm
Core Row Quantity21
Tube IncludedNo
Core Tube Width3 in / 77 mm

Limited Lifetime Warranty for Parts (plus Labor if installed by a GM dealer)

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

Before purchasing and installing an engine oil cooler, make sure it is the correct fit for your vehicle.

  • Keep oil and filter changed at required intervals
  • Keep cooler line clamps tight to help prevent leaks
  • Keep cooler secure to help prevent contact wear damage
  • Regularly inspect engine oil cooler for signs of damage or wear, and replace them if signs of damage are found.

ModelBody StyleTrimYear(s)
Silverado 1500Crew Cab Pickup2025, 2026
Silverado 1500Extended Cab Pickup2025, 2026
Suburban2025, 2026
Tahoe2025, 2026

Frequently Asked Questions

Yes. Always consult the Vehicle Owner's Manual or an expert technician before making any repairs or adjustments.

Yes. Overheated oil loses its viscosity and may cause failure in internal engine components.

Yes. Make sure to use a soft brush, or low pressure water, to help prevent damage to the cooler core fins.