Computer diagnostics
Your truck’s computers watch everything from the engine to the brakes. When something is off, they usually store a trouble code that points to where the problem is.
Signs you need it: the check engine light comes on, the truck feels sluggish, it isn’t running as smoothly as usual, or fuel economy has dropped. Ignoring early signs on a modern diesel usually means a bigger bill later.
What we do: connect diagnostic tools and software to read the codes and live data. A code tells us where to look, not what to replace. Our Red Seal technicians interpret the data and test until they find the root cause, whether that’s a sensor, an emissions control fault or something else.
Electrical diagnostics
Your truck’s wiring runs everything from the headlights and windows to critical engine functions.
Signs of trouble: you turn the key and nothing happens, headlights flicker, power windows quit, or the trailer lights act up. Corroded connections, chafed wires and failing parts cause most of these, and one fault can set off several symptoms.
What we do: trace the circuit with multimeters and circuit testers. We check voltage, find damaged wiring and blown fuses, and test alternators, starters and batteries. We test step by step instead of guessing, so the fix lasts.