Duramax trucks have earned a reputation for doing a little bit of everything well.
They're comfortable enough for a family road trip, capable enough to tow heavy, and dependable enough to put miles on every day.
From routine maintenance and diagnostics to major repairs and performance upgrades, our team helps keep Duramax powered Chevrolet and GMC trucks ready for whatever comes next.
Check engine lights, intermittent concerns, electrical faults, drivability issues, and warning messages all start with proper diagnostics and testing.
From fuel contamination and injector concerns to fuel pressure faults and drivability issues, we diagnose and repair Duramax fuel system problems properly before recommending parts replacement
Loss of power, turbocharger faults, vane position codes, boost leaks, and drivability concerns can all affect performance
Cooling system concerns can quickly become costly repairs. We diagnose coolant leaks, water pump failures, thermostats, radiators, and overheating concerns
Oil leaks can originate from several different locations. We identify the source of the leak and recommend the appropriate repair before replacing parts unnecessarily
We diagnose and repair DEF, DPF, SCR, NOx sensor, and emissions-related concerns on modern Duramax trucks
Not every engine concern requires a complete replacement. Our team performs the testing needed to identify the root cause and help you make an informed decision. From oil consumption and cooling system concerns to major engine failures and replacements, we'll help you determine the best option for your truck
From worn ball joints and tie rods to steering concerns, uneven tire wear, vibrations, and suspension wear, our team helps keep your truck driving safely and handling properly. Whether your truck is stock, used for towing, or equipped with aftermarket suspension components, we'll identify the root cause and recommend the repairs needed to keep it performing its best
Fuel system upgrades, turbos, suspension components, towing upgrades, and supporting modifications designed around your truck's intended use and goals
Modern Chevrolet and GMC trucks rely heavily on electronics and communication networks. We diagnose wiring, sensor, module, and electrical concerns before replacing part
Oil changes, fuel filters, transmission services, coolant flushes, differential services, and mileage based maintenance designed to keep your truck reliable.
Knox Performance Diesel and Off Road
126 South Park Street, Killeen, Texas 76541, United States