Spectra CU677 Radiator

Spectra CU677 Radiator for GM Trucks

The Spectra CU677 radiator is a direct-fit cooling system replacement for select Chevrolet and GMC full-size trucks from 1988-1993. Built to meet the durability expectations associated with OE-style radiator construction, it is a practical choice for restoring stable engine temperature control in demanding truck applications.

• OE-style radiator construction for select Chevrolet and GMC trucks
• Fits applications with 20-3/4 in. between tanks
• Configured for transmission oil cooler and engine oil cooler use
• Radiator cap required
• Cross-references Spectra Premium CU677 for the same application

Fitment and Application Details

Fits 1988-1993 Chevrolet C1500, N/A; 1988-1993 Chevrolet C2500, N/A; 1988-1993 Chevrolet K1500, N/A; 1988-1993 Chevrolet K2500, N/A; 1988-1993 GMC C1500, N/A; 1988-1993 GMC C2500, N/A; 1988-1993 GMC K1500, N/A; 1988-1993 GMC K2500, N/A. Fits 1988-1991 Chevrolet C3500, N/A; 1988-1991 Chevrolet K3500, N/A; 1988-1991 GMC C3500, N/A; 1988-1991 GMC K3500, N/A.

This radiator is built for Chevrolet C1500, Chevrolet K1500, GMC C2500, and related GM truck platforms that use the listed tank spacing and cooler configuration. The Spectra CU677 part number is also referenced in aftermarket catalogs under CU677 for the same application.

What This Radiator Helps Address

• Overheating caused by a worn or leaking radiator
• Coolant loss from cracked tanks or aging core components
• Reduced cooling performance in trucks with towing or heavy-duty use
• Transmission cooling concerns on vehicles equipped with a transmission oil cooler
• Engine temperature instability in high-mileage Chevrolet and GMC trucks

Installation Notes and Quality

Verify the 20-3/4 in. between-tanks measurement before ordering, and confirm your vehicle uses both transmission oil cooler and engine oil cooler provisions. A radiator cap is required for this application and is not stated as included. Spectra Premium radiators are engineered with OE-level durability expectations in mind for consistent replacement performance.

Quality assurance is supported by Spectra Premium’s OE-style design approach and application-specific construction for the listed Chevrolet and GMC truck fitments.