Peterbilt 579, 389 & 587 Aftermarket Parts Guide: Save 40-60% Over Dealer Prices

The Peterbilt Premium: Why Aftermarket Parts Make Sense

Peterbilt trucks command a loyal following — and premium pricing to match. Owner-operators and fleets who run Pete's know the quality, but they also know the cost. OEM Peterbilt parts carry some of the highest markups in the industry, making aftermarket alternatives not just attractive, but essential for controlling operating costs.

This guide covers the most popular Peterbilt models — the 579, 389, and 587 — and explains how to find the right aftermarket parts that deliver OEM fit and finish at a fraction of the cost.

Peterbilt 579: The Modern Workhorse

The 579 is Peterbilt's flagship aerodynamic highway tractor, competing directly with the Freightliner Cascadia and Kenworth T680. Introduced in 2012 and updated significantly in 2021, the 579 has become Peterbilt's volume seller.

Key Parts for the 579

• Headlights: The 579 uses a distinctive swept-back headlight design. Pre-2021 and 2021+ models use different assemblies. Aftermarket options run well below OEM — see current pricing.
• Chrome Bumpers: The 579's three-piece bumper design allows individual section replacement. Center, left, and right pieces are available separately, saving money when only one section is damaged.
• Mirrors: Heated, power-adjustable mirror assemblies cost far less aftermarket than at the dealer — see current pricing.
• Grilles: The 579 grille is a signature styling element. Chrome and painted options available.

Peterbilt 389: The Classic Icon

The 389 is the traditional long-nose Peterbilt that defines "classic trucking." Popular with owner-operators who value style and presence on the road. The 389 uses conventional round headlights that are among the most replaced parts in the Peterbilt lineup. Chrome accessories — bumpers, visors, exhaust stacks, and trim pieces — are a massive aftermarket category for the 389.

Peterbilt 587: The Efficient Alternative

The 587 was Peterbilt's first aerodynamic model, now largely replaced by the 579 in new production. However, thousands remain in active service, and parts demand remains strong. The 587 shares some components with the 579 but uses a distinct headlight design and bumper configuration. Always verify your specific model year when ordering.

Peterbilt Parts: What Fits What?

Cross-compatibility between Peterbilt models is limited compared to other brands. The 579, 389, and 587 each have unique exterior designs, meaning headlights, bumpers, and grilles are model-specific. Mirrors and some interior components may cross between models within the same generation. Always verify fitment by model, year, and configuration.

Chrome Upgrade Kits

Peterbilt owners are some of the biggest chrome buyers in trucking. Aftermarket chrome bumpers, grille surrounds, mirror covers, and door handle covers let you maintain that show-truck look without the show-truck price tag. EverTrust carries a full range of chrome accessories for all three models.

Shop Peterbilt aftermarket parts now — free shipping.

Related Guides

• Cross-Reference Part Number Guide
• Complete Buying Guide
• Cascadia Fitment Guide
• T680/T880 Compatibility Guide

Related: Peterbilt 389 grille assembly | Peterbilt 389 headlight housing