Diesel Technician II
Posted Aug 18, 2026 · We last checked this listing on Oct 6, 2026
Likely interview questions for this role
Written from this job description, not a generic list. Each one notes what the interviewer is really checking.
About your past
This role expects 80 percent productivity. How do you keep your hours efficient on a job?
What they are checking: Whether they understand flat-rate productivity and organize their work to hit it.
Tell me about a time you found a problem during a PM that the customer did not know about.
What they are checking: Whether they spot additional repairs and explain them in a way that helps the customer.
Tell me about a mistake you made on a repair and how you handled it.
What they are checking: Whether they own errors honestly, since a hidden mistake on a truck can become a safety issue.
What OEM training or engine classes would help you grow, and why?
What they are checking: Whether they are motivated to keep learning and moving toward advanced diagnostic work.
What would you do
You are partway through a repair and realize you need help. What do you do?
What they are checking: Whether they ask for help at the right time rather than guessing or wasting hours.
A customer's truck must be back on the road today, but the repair needs a part we do not have. What do you do?
What they are checking: Whether they communicate options with the service manager and customer instead of just stopping work.
About the work
Walk me through a preventive maintenance service you would perform on a Class 8 truck.
What they are checking: Whether they have truly mastered PM work, which the Technician II level expects without supervision.
A truck comes in with an intermittent check engine light. How do you diagnose it?
What they are checking: Whether they follow a logical diagnostic process using software and testing instead of throwing parts at it.
How do you diagnose a brake problem on an air brake system?
What they are checking: Whether they understand air brake systems, which are a safety-critical part of heavy-duty work.
What diagnostic software and tools have you used on heavy-duty trucks?
What they are checking: Whether they are comfortable with modern electronic diagnostics, not just mechanical work.
How do you document your work on a repair order?
What they are checking: Whether they write clear complaint, cause and correction notes that support billing and warranty.
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Practice this out loudThe full job description
As published by FleetPride.