What we do

Semi Truck Repair & Custom Builds

Name: Emerald Fleet Services
Address: 15022 Puyallup St #101, Sumner, WA, 98390, US
Telephone: (206) 304-6870
Price range: $$

Repair that gets your truck back to earning, and custom work that makes it yours. Everything below is done by the same family-owned crew in Sumner — call for a straight answer and a fair quote.

Repair & service

Keep it on the road

The work that keeps an owner-operator's truck — or a whole fleet — earning: engine and transmission, emissions, and a mobile mechanic when the truck can't come to us.

Fleet based in Puyallup? See our fleet service in Puyallup.

Diesel Engine & Transmission Repair

Major repair done right the first time.

Heavy-duty diesel engine repair, rebuilds and semi truck transmission work in Sumner, WA — precision machine work and diagnostics that find the real fault.

Full engine teardown, inspection & rebuild
Complex driveability & electrical diagnostics
OEM-grade parts and precision machine work

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DPF Cleaning & Emissions Repair

Stay compliant. Stay out of derate.

DPF cleaning, diesel particulate filter service and emissions repair in Sumner, WA — regen faults, derates and aftertreatment codes diagnosed and fixed.

DPF cleaning, baking & flow testing
Diesel particulate filter diagnostics
Aftertreatment & DEF system repair

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Mobile Diesel Mechanic & Roadside

The diesel mechanic who comes to you.

Mobile truck repair across Greater Seattle — a diesel mechanic comes to your yard or the roadside for diagnostics and emergency repair, so you skip the tow.

On-site & roadside diesel diagnostics
Emergency mechanical repair at your location
Semi truck roadside assistance across Greater Seattle

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Custom builds

Build it the way you want it

Full frame-up builds, custom engine builds from 500 to 1,200 horsepower, engine swaps, custom air ride kits and custom flooring — all under one roof.

See the build gallery

Custom Semi Truck Builds

Frame-up builds, done under one roof.

Full custom semi truck builds in Sumner, WA — frame-up builds where the engine, air ride suspension, flooring, dash and finish work are all planned and built by one shop.

Frame-up teardown, prep and paint
Custom engine build or engine swap to match the build
Custom air ride suspension, plumbed and tuned
Custom cab and sleeper flooring
Custom dash, gauges and interior details
Final assembly, inspection and road testing

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500–1,200 HPBuild range, by application

Custom Engine Builds

500 to 1,200 horsepower, built for the job.

Custom heavy-duty diesel engine builds for semi trucks in Sumner, WA — from 500 to 1,200 horsepower depending on the application, built from the block up and matched to how the truck runs.

Complete custom engine builds from the block up
Power targets from 500 to 1,200 hp, matched to your application
Precision machine work and OEM-grade components

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Engine Swaps

New heart, same truck.

Semi truck engine swaps and engine replacement in Sumner, WA — remove the old engine, fit a new, rebuilt or custom-built one, and integrate everything so the truck goes back to work.

Complete engine removal and replacement
New, rebuilt or custom-built replacement engines
Mounts, cooling, exhaust and aftertreatment integration

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Custom Air Ride Kits

Ride height, ride quality — your call.

Custom air ride kits and air suspension work for semi trucks in Sumner, WA — designed, fitted and plumbed to your truck for ride quality, ride height and stance.

Custom air ride kit design and installation
Front and rear air suspension
Air management: tanks, valves, lines and controls

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Custom Flooring

Floors built to take the abuse.

Custom cab and sleeper flooring for semi trucks in Sumner, WA — sub-floor prep, replacement and custom finishes that stand up to years of boots, grease and weather.

Cab and sleeper floor replacement
Custom flooring materials and finishes
Sub-floor inspection and prep before the new floor goes down

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Two ways to get fixed

Shop precision, mobile flexibility

In our Sumner shop

A fully-equipped facility for major repairs, engine rebuilds, custom builds and complex diagnostics — the controlled environment serious heavy-duty work demands.

On-site & roadside

Mobile units that bring diagnostics and emergent repairs to your yard or the roadside, cutting towing time and getting drivers moving again fast.

Want to know more about who we are? Visit our about page or check our FAQ for answers to common repair questions.

Not sure which service you need?

Tell us the truck and the symptoms — we'll point you in the right direction and give you a fair quote.

(206) 304-6870 Request a Quote