TYC 20-5174-00 Headlight Assembly - Left

TYC Headlight Assembly for Cadillac DeVille

This TYC headlight assembly is a direct-fit exterior lighting replacement for the 1997-1999 Cadillac DeVille, left side. Built with a plastic lens and plastic housing, it uses halogen bulbs and includes both high beam and low beam bulbs for a complete lighting service on the driver side.

Key Features

• Fits 1997-1999 Cadillac DeVille, left
• TYC Regular product line headlight assembly
• Halogen bulb type with bulbs included
• High beam bulb included: halogen
• Low beam bulb included: halogen
• Plastic lens and plastic housing
• SAE/DOT compliant
• Other side reference: 20-5173-00

Product Details

The TYC 20-5174-00 is a left headlight assembly for Cadillac DeVille models from 1997 through 1999. It is built for halogen lighting systems and follows the TYC Regular line, which focuses on OE-style replacement fitment for exterior lighting applications. The assembly is SAE/DOT compliant and uses plastic construction for both the lens and housing. For buyers searching for a 1997 Cadillac DeVille left headlight assembly, a 1998 Cadillac DeVille halogen headlamp, or a 1999 Cadillac DeVille driver-side headlight replacement, this part number 20-5174-00 matches the listed application.

This part cross-references Cadillac 16526199 and Partslink GM2502165 for the same application.

Common Reasons to Replace

• Cracked or cloudy headlight lens
• Dim or uneven forward lighting
• Moisture intrusion in the headlamp housing
• Failed halogen bulb or worn reflector performance
• Restoring proper driver-side lighting on a Cadillac DeVille

Installation Notes and Tips

Verify the vehicle is equipped with halogen lighting before ordering. This assembly is listed for the left side only, and the opposite side reference is 20-5173-00. Confirm connector and mounting points against the original headlamp before installation on your Cadillac DeVille. The part number 20-5174-00 is the key reference for matching the correct driver-side unit.

Quality Assurance

This TYC headlight assembly is SAE/DOT compliant and built as a replacement lighting component for the specified Cadillac DeVille applications. The TYC Regular line is positioned as a practical OE-style replacement option for exterior lighting service.