Dorman 1590373 Headlight Assembly - Front Left

OE-Style Headlight Replacement

This Dorman headlight assembly is a direct replacement for the original front left lamp on select Chevrolet, GMC, and Buick vehicles. Built to match stock fit, appearance, and function, Dorman 1590373 supports a clean repair for drivers replacing a damaged or worn headlamp.

Compatible With 2006-2009 Chevrolet Trailblazer, front left; 2006-2009 GMC Envoy, front left; 2006-2007 Buick Rainier, front left; 2006 Chevrolet Trailblazer EXT, front left; and 2006 GMC Envoy XL, front left.

• OE-style replacement headlight assembly for the front left position
• Halogen bulb technology with high beam and low beam function
• Clear lens, clear bulb color, and clear housing for a stock-like appearance
• 12-volt electrical design with 60W high beam wattage and 13 amp rating
• Street legal and supplied with bulbs
• Polycarbonate lens material for everyday road use
• Reverse-engineered to match the original headlight on specific vehicles

Detailed Product Overview

Dorman 1590373 is a replacement headlight assembly engineered for vehicles that need a front left lighting repair without returning to the dealership. It is designed around the original equipment layout for the 2006-2009 Chevrolet Trailblazer, 2006-2009 GMC Envoy, 2006-2007 Buick Rainier, 2006 Chevrolet Trailblazer EXT, and 2006 GMC Envoy XL. The halogen bulb design, clear lens, and stock-style housing help restore proper forward lighting and maintain the factory look. This part cross-references OE numbers 15866069 and 15899035 for the same application.

Common Repair Uses

• Cracked or broken front left headlight housing
• Clouded or damaged lens affecting nighttime visibility
• Failed halogen headlamp assembly
• Restoring proper beam output after collision damage
• Replacing a worn OE-style lamp on Trailblazer, Envoy, or Rainier models

Installation Notes and Tips

Verify the vehicle’s front left headlight configuration before installation and compare the connector, mounting points, and lamp style to the original assembly. Because mounting hardware is not listed, reuse existing hardware as needed. Confirm bulb and electrical connections are secure before road testing the lighting pattern.

Quality Assurance

Dorman replacement lighting parts are built to match the original part’s fit and function on the listed applications. Part number 1590373 is intended as a direct OE-style replacement for the specified vehicles and positions.