Routine Maintenance
Oil, filters, fluids, and scheduled service to prevent costly breakdowns and extend engine life.
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Serving Santa Rosa & Sonoma County
Diesel Done Right. Performance That Lasts.
Your premier NorCal Ford Power Stroke, Dodge Cummins & Chevrolet Duramax truck specialist.
Expert diagnostics, repair, and performance service for light, medium, and heavy-duty diesel trucks.
Factory-level diagnostics
Light · Medium · Heavy duty
Honest, upfront pricing
5.0★
Google star rating
38+
Five-star reviews
9+
Specialized services
3×
Duty classes serviced
What We Do
Full-Service Diesel Care
From routine maintenance to complex performance diagnostics, we keep your rig running strong and pulling hard.
Engine Performance Diagnostics
Advanced scanning and testing to pinpoint power loss, fault codes, and drivability issues fast.
Learn moreFuel Injection & Injectors
Injection pump and injector diagnosis, service, and replacement for clean, efficient power delivery.
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Why Sonny's
Built on Trust, Backed by Expertise
Diesel Specialists
We live and breathe diesel — every truck that rolls in gets true specialist attention, not general-shop guesswork.
Fast, Accurate Diagnostics
Modern diagnostic tools mean less downtime — we find the real problem the first time and get you back on the road.
Honest & Upfront
Clear estimates and straight answers. We tell you what your truck needs — and what it doesn't.
All Duty Classes
Light, medium, and heavy-duty trucks — from your daily driver to your working fleet, we service them all.
Complete Repairs
Diagnostics, fuel systems, electrical, emissions, brakes, and turbo — one shop for the whole job.
Local & Reliable
Proudly serving Santa Rosa and Sonoma County drivers and businesses that depend on their trucks.
Reviews
Rated 5.0 by Local Drivers
“Great people and great service.”
“If you want great customer service, go to Sonny's.”
“If you need diesel work done, this is the place to go.”