Frequently Asked Questions About Peterbilt 389 Roof Trim

Will this roof trim fit my specific year model Peterbilt 389?

Most aftermarket roof trim pieces are designed to fit Peterbilt 389 models from 2008 to present. However, there can be slight variations between model years, particularly in the cab roof radius and mounting hole patterns. We recommend checking your existing trim measurements or contacting us with your VIN to ensure proper fitment. Pre-2008 models may require modification or different trim pieces entirely.

What's the difference between stainless steel and chrome-plated roof trim?

Stainless steel roof trim (typically 304-grade) offers superior durability and won't rust, peel, or flake over time. It has a brushed or polished finish that's slightly less reflective than chrome. Chrome-plated trim provides a mirror-like finish but requires more maintenance and can eventually show wear, especially in harsh weather conditions. Stainless steel costs more upfront but typically lasts the lifetime of your truck, while chrome may need replacement every 5-7 years depending on exposure.

Do I need to drill new holes to install roof trim, or will it use existing mounting points?

Most quality roof trim kits are designed to use your truck's existing mounting holes from the factory trim. However, some custom or wider trim styles may require drilling additional holes. Always test-fit the trim before removing adhesive backing or drilling. If your truck came without factory trim, you'll need to drill mounting holes following the manufacturer's template. We recommend having a professional installer handle this to avoid cab damage.

How difficult is it to remove old roof trim and install new pieces?

Removal typically takes 1-2 hours and involves carefully prying off the old trim and cleaning adhesive residue with a heat gun and adhesive remover. Installation of new trim takes another 1-2 hours. The main challenges are reaching all mounting points safely, properly aligning multi-piece trim sets, and ensuring a weather-tight seal. Most customers with basic mechanical skills can complete this job with standard hand tools, though a second person makes alignment much easier.

What trim styles and widths are available for the Peterbilt 389?

Standard roof trim comes in 2-inch, 3-inch, and 4-inch widths, with 3-inch being the most common OEM replacement. Styles include flat trim, curved/bubble trim, and trim with integrated LED light cutouts. Some trim features additional accent grooves or beveled edges. Cab extender trim is also available for trucks with factory or aftermarket sleeper extensions. Match your trim width to your existing visor and side trim for a cohesive appearance.