OEM vs Aftermarket APU Service Parts: Which Is Better for Your Truck? Choosing between OEM and aftermarket service parts for your truck’s auxiliary power unit (APU) can impact performance, warranty coverage, and cost. This guide compares these two options, helping you make an informed decision that keeps your fleet running reliably and efficiently. Read more at https://truckacparts.wordpress.com/2025/11/21/oem-vs-aftermarket-apu-service-parts/ #oemapuparts #oemparts #aftermarketparts #apuparts #carrierapu #automotiveguide