Spectra Premium CU2423 Radiator with Transmission Oil Cooler – Chevy Silverado, GMC Sierra & Cadillac Escalade

Benefits of Multi-Louvered Radiator Fins

Improved Air Contact: Multi-louvered fins are designed to increase interaction between moving air and the radiator’s heat-transfer surfaces.

Efficient Cooling: The fin design supports heat dissipation within the available radiator core area.

Factory-Style Performance: The radiator is engineered to meet the cooling requirements of compatible original-equipment applications.

Low-Speed Cooling Support: When paired with properly functioning cooling fans, the radiator can dissipate heat during traffic and extended idling.

Highway Operation: Adequate airflow through the radiator helps maintain appropriate coolant temperatures during normal driving.

Actual cooling performance depends on the condition of the complete cooling system, including the water pump, thermostat, fan assembly, coolant, and airflow path.

Integrated Transmission Oil Cooler (TOC)

Automatic transmissions generate heat during normal operation.

That heat can increase during towing, hauling, stop-and-go driving, and sustained operation under load.

Excessive transmission fluid temperatures can accelerate fluid degradation and contribute to transmission wear.

The Spectra Premium CU2423 includes an integrated transmission oil cooler for compatible vehicles.

Why Transmission Cooling Matters

Temperature Management: The cooler helps transfer heat between transmission fluid and the engine cooling system.

Factory-Style Integration: Supports compatible vehicles originally equipped with radiator-based automatic-transmission cooling.

Convenient Replacement: Allows the original transmission cooler circuit to connect to the replacement radiator when the fittings match.

Reliable Operation: Proper transmission fluid temperature management supports long-term transmission performance.

Important Transmission Cooler Considerations

Before installation, verify:

• Transmission cooler fitting sizes.
• Cooler line connection types.
• Original radiator configuration.
• Factory transmission cooling equipment.
• Compatibility with any external auxiliary transmission cooler.

Do not assume all GM trucks use identical transmission cooler connections.

No Engine Oil Cooler (EOC): Why This Matters

One of the most important specifications of the Spectra Premium CU2423 is that it does not include an integrated engine oil cooler.

This makes it different from the Spectra Premium CU2370 radiator, which is advertised with both transmission and engine oil cooling provisions.

What Is an Engine Oil Cooler?

An engine oil cooler helps manage engine oil temperature by transferring heat away from the oil.

Some GM trucks and SUVs use a radiator-integrated engine oil cooler, while others use different cooling arrangements or do not require one.

When Is the CU2423 the Correct Choice?

The CU2423 is intended for compatible vehicles that require:

• A 34-1/16-inch radiator core.
• An integrated transmission oil cooler.
• No radiator-integrated engine oil cooler.
• The corresponding factory mounting and hose configuration.

Important: If your original radiator has engine oil cooler connections, do not substitute the CU2423 without confirming an approved alternative cooling arrangement. Eliminating a required engine oil cooler can compromise engine oil temperature management.

Spectra Premium CU2423 Technical Specifications

Measurement note: The 18-7/16 × 3-1/8-inch dimensions describe the inlet and outlet headers, not the radiator hose inlet and outlet diameters. Confirm the complete radiator dimensions before ordering.

Chevrolet Silverado Radiator Replacement

The Chevrolet Silverado is one of the most widely used full-size pickup trucks in North America.

Whether used for daily driving, work duties, or towing, the Silverado depends on a properly functioning cooling system.

The Spectra Premium CU2423 is associated with selected Silverado applications requiring a 34-1/16-inch radiator core, an integrated transmission cooler, and no radiator-integrated engine oil cooler.

Silverado Fitment Considerations

Radiator selection may vary depending on:

• Model year.
• Engine displacement.
• Transmission type.
• Factory towing package.
• Engine oil cooler equipment.
• Transmission cooler configuration.
• Radiator core dimensions.
• Cooling fan and shroud arrangement.

Verify the vehicle’s original radiator specifications before ordering.

GMC Sierra Radiator Replacement

The GMC Sierra shares many mechanical components with corresponding Chevrolet Silverado models.

However, radiator compatibility is not universal across all engines, transmissions, and model years.

The Spectra Premium CU2423 is designed for selected GMC applications requiring the appropriate core dimensions and transmission cooler configuration.

Benefits for GMC Sierra Owners

A properly fitted OE-style replacement radiator can help:

• Restore cooling system reliability.
• Replace leaking or restricted factory components.
• Maintain factory hose and mounting arrangements.
• Preserve compatible transmission cooling connections.
• Reduce the risk of overheating caused by a deteriorated radiator.

Confirm the original radiator part number and cooling package before purchasing.

Cadillac Escalade Radiator Replacement

The Cadillac Escalade combines full-size GM truck engineering with luxury features and V8 performance.

Its cooling system must support normal driving, extended highway travel, and demanding operating conditions.

The Spectra Premium CU2423 is associated with selected Cadillac applications that use the corresponding radiator configuration.

Escalade Cooling System Considerations

Before ordering, verify:

• Original radiator core width.
• Upper and lower hose connections.
• Transmission cooler fittings.
• Presence or absence of an engine oil cooler.
• Cooling fan and shroud compatibility.
• Radiator mounting locations.

Because Cadillac Escalade cooling systems vary across model years and engine configurations, VIN-specific fitment verification is essential.

Additional GM Truck and SUV Applications

The CU2423 radiator designation is associated with selected full-size GM truck and SUV cooling system configurations.

Depending on the exact vehicle and original equipment, related application families may include:

• Chevrolet Silverado.
• Chevrolet Tahoe.
• Chevrolet Suburban.
• Chevrolet Avalanche.
• GMC Sierra.
• GMC Yukon.
• GMC Yukon XL.
• Cadillac Escalade.

Fitment warning: These are application families to verify, not a guarantee that the Spectra Premium CU2423 fits every model or year. Confirm fitment through the manufacturer’s catalog using the vehicle’s year, make, model, engine, and original radiator configuration.

Spectra Premium CU2423 vs. CU2370: What’s the Difference?

The CU2423 and CU2370 are both associated with GM truck and SUV radiator applications, but they have an important cooling system difference.

Which Radiator Should You Choose?

Choose the CU2423 when your vehicle’s verified factory radiator configuration requires a transmission oil cooler but no integrated engine oil cooler.

Choose the CU2370 when your vehicle’s verified factory radiator configuration requires both an integrated transmission oil cooler and an integrated engine oil cooler.

Do not select a radiator based on core width alone.

The correct cooler configuration is essential for proper installation and operation.

OE-Style Drop-In Installation

The Spectra Premium CU2423 is engineered for direct replacement in compatible vehicles.

Its OE-style design is intended to match factory mounting locations, hose routing, and cooling system connections.

Advantages of Direct-Fit Construction

Factory Mounting Compatibility: Designed to use the original radiator mounting arrangement where specified.

Correct Cooling System Integration: Intended to work with compatible factory hoses, cooling fans, and shrouds.

Transmission Cooler Compatibility: Provides integrated cooler connections for the appropriate applications.

Included Accessories: The supplied accessory pack helps support installation.

Reduced Fabrication: A correctly matched radiator should not require custom brackets or major modifications.

The exact contents of the accessory pack should be confirmed before installation.

How to Replace a Spectra Premium CU2423 Radiator

Replacing a radiator on a GM truck or SUV can be a manageable project for experienced DIY mechanics.

However, procedures vary by vehicle, engine, transmission, and cooling system configuration.

Step 1: Allow the Engine to Cool

Park the vehicle on a level surface and allow the engine to cool completely.

Never remove a radiator cap or pressurized coolant reservoir cap while the cooling system is hot.

Step 2: Drain the Cooling System

Position a suitable drain pan beneath the radiator.

Drain the coolant according to the factory service procedure.

Inspect the coolant for corrosion, contamination, or debris.

Step 3: Remove the Original Radiator

Disconnect the upper and lower radiator hoses.

Remove the cooling fan shroud and any components obstructing radiator removal.

Disconnect the transmission cooler lines using the appropriate procedure.

Remove the radiator mounting hardware.

Carefully lift the original radiator from the engine compartment.

Step 4: Compare the Replacement Radiator

Before installation, compare the Spectra Premium CU2423 with the original.

Verify:

• Radiator core dimensions.
• Overall radiator dimensions.
• Mounting bracket locations.
• Upper and lower hose connections.
• Cooling fan and shroud clearance.
• Transmission cooler fittings.
• Absence of engine oil cooler connections.
• Pressure-control configuration.

Do not force the radiator into position if the mounting points or hose connections do not match.

Step 5: Install the Spectra Premium Radiator

Position the replacement radiator into the factory mounting area.

Confirm that the radiator sits securely and that the mounting points align correctly.

Install the appropriate mounting hardware and supplied accessories.

Step 6: Reconnect Transmission Cooler Lines

Reconnect the transmission cooler lines using the correct fittings and procedures.

Inspect the lines for corrosion, damage, or leaks.

Do not overtighten fittings or use incompatible adapters.

Step 7: Reconnect Radiator Hoses

Reconnect the upper and lower radiator hoses using suitable clamps.

Inspect the hoses for cracking, swelling, or deterioration.

Replace damaged hoses before refilling the cooling system.

Step 8: Refill and Bleed the Cooling System

Refill the system using coolant appropriate for the engine and model year.

Follow the factory coolant filling and air-removal procedure.

Trapped air can interfere with coolant circulation and cause overheating.

Step 9: Verify Cooling System Operation

Start the engine and monitor coolant temperature.

Confirm that the thermostat opens and the cooling fans operate correctly.

Inspect all radiator hose connections and transmission cooler fittings for leaks.

After the engine cools, recheck coolant level and mounting hardware.

Check transmission fluid level according to the applicable service procedure.

Common GM Truck and SUV Radiator Problems

A radiator replacement may be necessary when the original cooling system develops leaks, restrictions, or physical damage.

Cracked Radiator End Tanks

Repeated heating and cooling cycles can weaken aging radiator components.

Restricted Cooling Passages

Corrosion, contamination, and deposits can reduce coolant flow.

Leaking Radiator Seals

Aging seals can allow coolant to escape from the radiator assembly.

Damaged Cooling Fins

Bent or clogged fins can restrict airflow and reduce heat transfer.

Transmission Cooler Leaks

A damaged internal cooler can allow fluid leakage and, in some failures, cross-contamination between coolant and transmission fluid.

Cooling Fan Problems

A malfunctioning fan clutch, electric fan, relay, or control system can reduce airflow through the radiator.

Thermostat or Water Pump Failure

A faulty thermostat or water pump can cause overheating even when the radiator is functioning properly.

Before replacing components, inspect the complete cooling system and identify the underlying cause.

Complete Your GM Cooling System Maintenance

When replacing the radiator, consider inspecting related components.

Radiator Hoses: Replace hoses showing cracks, swelling, or deterioration.

Thermostat: Verify correct operation and replace it when necessary.

Water Pump: Inspect for coolant leaks, bearing noise, and other signs of failure.

Cooling Fans: Confirm proper operation and adequate airflow through the radiator.

Radiator Cap: Verify the correct pressure rating for the cooling system.

Coolant: Use a coolant formulation appropriate for the engine and model year.

Transmission Cooler Lines: Inspect for leaks, corrosion, and damaged fittings.

Transmission Fluid: Check the fluid level and condition according to the vehicle manufacturer’s procedure.

Explore additional Chevrolet, GMC, and Cadillac cooling components at Pro Street Online.

Is the Spectra Premium CU2423 Radiator Worth It?

For GM truck and SUV owners seeking a reliable replacement radiator, the Spectra Premium CU2423 offers several practical advantages.

Its high-density multi-louvered cooling fins, integrated transmission oil cooler, and OE-style construction make it a strong option for compatible factory cooling systems.

This radiator may be particularly useful for owners who:

• Need to replace a leaking factory radiator.
• Drive a compatible Chevrolet Silverado or GMC Sierra.
• Own a compatible Cadillac Escalade.
• Want to maintain factory-style cooling performance.
• Need integrated transmission cooling.
• Do not require a radiator-integrated engine oil cooler.
• Prefer a direct-fit replacement over a universal radiator.
• Want a radiator designed for dependable daily operation.

Proper fitment remains the most important consideration.

Confirm the vehicle’s original radiator specifications and cooler configuration before purchasing.

Restore Your GM Truck Cooling System with Spectra Premium at Pro Street Online

Whether you’re maintaining a high-mileage Silverado, replacing a leaking GMC Sierra radiator, or restoring cooling system reliability in a Cadillac Escalade, dependable engine cooling is essential.

The Spectra Premium CU2423 Radiator with TOC, Without EOC combines a 34-1/16-inch core, high-density multi-louvered cooling fins, an integrated transmission oil cooler, and OE-style installation in a practical replacement package.

Designed for compatible GM truck and SUV applications, this radiator offers an effective way to restore factory cooling performance and maintain reliable vehicle operation.

Shop Spectra Premium radiators, Chevrolet and GMC cooling components, transmission cooling parts, and replacement radiators at www.ProStreetOnline.com.