Refresh with the BESTfit Manual Window Regulator for Peterbilt 300 Series, a durable, superior replacement designed to restore smooth, manual window operation in a range of Peterbilt models, including 330 (1995-2005), 335 (2005-2010), 357 (1987-2007), 375 (1988-1995), 377 (1988-2000), 378 (1988-2007), and 379 (1987-2007). It's engineered with a factory-style plug and requires use of your truck's square-notched crank (not included), offering a direct-fit solution that helps bring worn window systems back to reliable performance. Sold individually, select either driver or passenger side, this regulator includes a warranty against defects in workmanship and material from the date of purchase. Replacing original equipment with this part can help maintain proper cab comfort and ease of use without the complexity of power window systems, and checking your truck's specific model compatibility before ordering ensures the proper fit for your application.