GM Genuine parts may ship in a GM Genuine or AcDelco box. The product will fit and function the same.
GM GENUINE 21566 Specifications
Coolant Level Indicator Port
No
Core Height (IN)
14.6
Core Height (MM)
370.78
Core Material
Aluminum
Core Row Quantity
1
Core Thickness (IN)
0.57
Core Thickness (MM)
14.53
Core Width (IN)
26.78
Core Width (MM)
680.23
Down Flow Or Cross Flow Type
Cross Flow
Engine Oil Cooler Included
No
Frame Included
Yes
Inlet Diameter (IN)
1.34
Inlet Diameter (MM)
34
Inlet Header Length (IN)
17.05
Inlet Header Length (MM)
433
Inlet Header Width (IN)
2.8
Inlet Header Width (MM)
71
Inlet Location
Top Right
Internal Engine Oil Cooler
No
Internal Transmission Oil Cooler
Yes
Mounting Hardware Included
No
Mounting Type
Pin
Outlet Diameter (IN)
1.34
Outlet Diameter (MM)
34
Outlet Header Length (IN)
17.05
Outlet Header Length (MM)
433
Outlet Header Width (IN)
3.5
Outlet Header Width (MM)
89
Outlet Location
Bottom Left
Radiator Cap Included
No
Tank Material
Plastic
Thermostat Included
No
Transmission Oil Cooler Distance between Fittings (IN)
11.5
Transmission Oil Cooler Distance between Fittings (MM)
292
Transmission Oil Cooler Fitting Diameter (IN)
0.47
Transmission Oil Cooler Fitting Diameter (mm)
12
Transmission Oil Cooler Fitting Gender
Female
Transmission Oil Cooler Fitting Type
Quick Connect
Transmission Oil Cooler Included
Yes
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.
Cooling System Maintenance | Tips & Tools