Frequently Asked Questions
Everything fleet managers, owner-operators, and drivers ask us most — about our repairs, shop and mobile service, hours, service area, and how to get started.
Services & Repairs
What types of trucks and engines do you work on?
We specialize in heavy-duty commercial trucks and diesel engines — the tractors, straight trucks, and fleet vehicles that businesses depend on. Our technicians focus on commercial diesel equipment, from major engine work to emissions systems and roadside repairs.
Do you perform complete engine rebuilds?
Yes. We handle complete heavy-duty engine rebuilds and major repair in our Sumner facility — full teardown, inspection, precision machine work, and reassembly with OEM-grade components, backed by complex diagnostics.
Can you service DPF and emissions systems?
Absolutely. We provide DPF cleaning and flow testing, aftertreatment and DEF diagnostics, forced regen and derate resolution, and EGR/SCR/sensor repair to keep your trucks compliant and out of derate.
Do you handle diagnostics and electrical problems?
Yes. We run complex driveability and electrical diagnostics either in the shop or on-site, pinpointing the real problem before any parts are ordered so you're not paying to guess.
Can you set up a preventive maintenance schedule for my fleet?
We can. Scheduled preventive maintenance is the single biggest lever on uptime — it turns surprise breakdowns into planned service. We keep records on your trucks so issues get caught early and fleet planning gets easier each season.
Shop & Mobile Service
Do you offer mobile or roadside repair?
Yes. Our mobile units bring diagnostics and emergent repairs to your yard or the roadside across the Greater Seattle area, cutting towing time and getting drivers moving again fast.
What should I do if my truck breaks down on the road?
Call us at (206) 304-6870. Tell us where you are, what you're running, and the symptoms. If the truck can't make it to the shop, we'll work to get a mobile unit to you and get you the fastest path back on the road.
Shop service or mobile — which is right for my repair?
Major work like engine rebuilds is best handled in our Sumner shop, where we have the equipment and controlled environment for it. Diagnostics and emergent repairs can often be done on-site. Call us and we'll point you to the right option.
Location, Hours & Service Area
Where is Emerald Fleet Services located?
We're located at 15022 Puyallup St #101, Sumner, WA 98390.
What are your hours?
Our hours are Monday – Friday 9:00 AM – 5:00 PM, Saturday 10:00 AM – 3:00 PM, Sunday Closed. For roadside breakdowns, call first and we'll get you the fastest available help.
What areas do you serve?
We're based in Sumner, WA and serve the Greater Seattle area and the wider South Sound, including Sumner, Puyallup, Tacoma, Fife, Auburn, Kent, Federal Way, Renton, Seattle, Bellevue. If you run commercial trucks in the region, we can help.
Getting Started
How do I get a quote?
Call us at (206) 304-6870 or send a message through our contact form. Tell us the truck, the symptoms, and your timeline, and we'll respond with a straight answer and a fair quote.
Are you really family-owned?
Yes. Emerald Fleet Services is family-owned and operated. When you call, you deal with the people who own the shop and stand behind the work — not a corporate service desk.
Do you work with fleets and owner-operators?
Both. We work with fleet managers, owner-operators, and commercial drivers — whether you run one truck or manage a whole fleet, our focus is keeping you on the road and earning.
How can I reduce my fleet's downtime?
Stay ahead of failures with preventive maintenance, get fast and accurate diagnostics, and use mobile service to avoid unnecessary tows. Every decision we make is built around getting your trucks back to work quickly.
Still have questions?
Call us or send a message — we'll give you a straight answer about your truck and a fair quote.