All services
Diagnostics
The step before anything gets replaced. I find the cause, then tell you what it will take.

Check engine light diagnosis
Read, traced to a cause and explained in plain terms.
Noises, rattles and vibrations
Driven and listened to until I know which part is talking.
Leak tracing
Oil, coolant or fluid followed back to where it actually starts.
Will-not-start diagnosis
Worked through in order so I am not guessing at parts.
Drivability complaints
Hesitation, stalling or rough running, checked while it is happening.
Fault explained before repair
You hear what failed and why before I touch anything.
Not sure which of these you need?
Describe the vehicle and what is bothering you about it. That is usually enough to work out the rest.