GM Genuine parts may ship in a GM Genuine or AcDelco box. The product will fit and function the same.
GM GENUINE 20837 Specifications
Core Height (IN)
15.004
Core Height (MM)
381.1
Core Material
Aluminum
Core Row Quantity
1
Core Thickness (IN)
0.9252
Core Thickness (MM)
23.5
Down Flow Or Cross Flow Type
Cross Flow
Engine Oil Cooler Fitting Diameter (IN)
0.787
Engine Oil Cooler Fitting Diameter (MM)
20
Engine Oil Cooler Fitting Gender
Female
Engine Oil Cooler Included
Yes
Engine Oil Cooler Number of Plates
4
Engine Oil Cooler Type
PLATE
Inlet Diameter (IN)
1.311
Inlet Diameter (MM)
33.3
Inlet Header Length (IN)
16.5158
Inlet Header Length (MM)
419.5
Inlet Header Width (IN)
2.9764
Inlet Header Width (MM)
75.6
Integral Engine Oil Cooler
Yes
Integral Transmission Oil Cooler
Yes
Mounting Type
Brackets and Pins
Oil Cooler Fittings Distance Apart (IN)
11.5
Oil Cooler Fittings Distance Apart (mm)
292
Outlet Diameter (IN)
1.555
Outlet Diameter (MM)
39.5
Outlet Header Length (IN)
16.5158
Outlet Header Length (MM)
419.5
Outlet Header Width (IN)
2.9764
Outlet Header Width (MM)
75.6
Outlet Location
Lower right
Tank Material
Plastic
Transmission Oil Cooler Distance between Fittings (IN)
11.496
Transmission Oil Cooler Distance between Fittings (MM)
292
Transmission Oil Cooler Fitting Diameter (IN)
0.625
Transmission Oil Cooler Fitting Diameter (mm)
15.875
Transmission Oil Cooler Fitting Type
Quick Connect
Transmission Oil Cooler Included
Yes
Transmission Oil Cooler Plate Quantity
4
Transmission Oil Cooler Type
PLATE
Width (MM)
818.7
Drain Cock Not Included
The radiator is the heart of a vehicle's cooling system. So, when it comes to replacing a worn radiator, you need a product that will match the original factory part in fit, form and function.
Superior fin waves provide a higher heat transfer
Lightweight; the radiators have a positive heat transfer to weight ratio
Corrosion-resistant aluminum core makes GM OE Radiators long lasting
Manufactured to GM OE specification for fit, form, and function
Service Tip: If you are experiencing unexplained or reoccurring radiator core leaks, or notice dark spots on your failed radiator core, test your coolant for Electrolysis. If detected, correct the source of the problem before replacing your failed radiator to prevent repeat failure.
Measurement Guide
Cooling System Maintenance | Tips & Tools
Without regular maintenance, cooling system components will degrade and fail prematurely, which can lead to costly engine damage. Protect your engine with simple preventative maintenance:
Completely drain and flush the system using Cooling System Flush prior to installation. Flushing the system is critical to prevent system contamination and failure.
Consider replacing the Radiator Hoses (and Hose Clamps), Thermostat and Radiator Cap as part of routine preventative maintenance. System contamination can cause these parts to degrade and fail over time, which can lead to severe engine damage from overheating.
Refill radiator with fresh Coolant / Antifreeze according to the volume and formula specified in your Owner's Manual. Inspect levels and condition every year.