Dorman 1591016 Headlight Assembly - Left

OE-Style Left Headlight Assembly

This Dorman headlight assembly is a direct replacement for select Chevrolet full-size trucks and SUVs. It is built to match the original headlight’s look, fit, and function for a lower-cost repair option, with clear lens styling and halogen lighting.

Compatible with 2003-2004 Chevrolet Avalanche 1500, left, w/Decor Package; 2003-2004 Chevrolet Avalanche 2500, left, w/Decor Package; 2003-2004 Chevrolet Silverado 1500, left; 2003-2004 Chevrolet Silverado 2500, left; 2003-2004 Chevrolet Silverado 2500 HD, left; 2003-2004 Chevrolet Silverado 3500, left; and 2003 Chevrolet Silverado 1500 HD, left.

• Brand: Dorman
• Part number: 1591016
• Left-side headlight assembly
• Clear lens with plastic housing and plastic lens
• Halogen bulb technology
• Bulbs included
• Street legal: Yes
• 12.8-volt electrical specification
• Reverse-engineered to match the stock headlight on specific vehicles

Detailed Product Overview

Dorman 1591016 is a replacement headlight assembly engineered for the left side of select Chevrolet Avalanche and Silverado models. It is designed to follow the original equipment shape and mounting points so the lamp aligns with the factory front-end design. The clear lens and halogen setup support standard exterior lighting performance for daily driving and road use.

This part cross-references TYC 20-6386-90 for the same application. If you are searching for a 2003 Chevrolet Silverado 1500 HD left headlight assembly or a 2004 Chevrolet Avalanche 1500 left headlight assembly, this Dorman unit provides a direct-fit replacement path. The Dorman 1591016 part number is also useful when comparing OE-style replacement options for 2003-2004 Chevrolet Silverado and Avalanche trucks.

Common Problems This Part Can Address

• Cracked or damaged headlight lens
• Cloudy or worn exterior lighting appearance
• Failed or dim halogen headlight output
• Water intrusion from a compromised lamp housing
• Mismatch after collision repair or front-end replacement

Installation Notes and Tips

Verify left-side fitment before ordering, especially on 2003-2004 Chevrolet Avalanche models with the Decor Package. Confirm the vehicle’s original lamp style, connector condition, and bulb type before installation. Transfer any vehicle-specific wiring or aiming adjustments as needed during replacement.

Quality Assurance

This Dorman replacement headlight assembly is reverse-engineered to match the stock headlight on the listed vehicles. It is built for street-legal use and supplied with bulbs included for a complete lighting replacement on the specified application.