EGR DIESEL DURAMAX SPECIALISTS
When dealers give up, we get to work. Expert diesel repair, honest diagnosis, and real results — for residential and commercial trucks that have to run.
BUILT ON
HONESTY.
DRIVEN BY
EXPERTISE.
Eli Grijalva built EGR Diesel around one principle: fix it right the first time, at a price that doesn't leave you bleeding. No dealer markup, no unnecessary upsells, no runaround.
Located in Fontana, CA, we specialize exclusively in diesel trucks — particularly Duramax-powered rigs. Residential and commercial customers across Southern California trust us for everything from routine maintenance to full engine rebuilds.
Duramax Specialists
We live and breathe Duramax. LB7, LLY, LBZ, LMM, LML, L5P — we know every generation, every common failure, every fix. This isn't a side service. It's all we do.
"Had an issue that the dealer couldn't fix. Came here and couple hours later problem solved."
OUR SERVICES
From a diagnostic scan to a full engine rebuild — we handle everything your diesel needs to stay on the road.
Diesel Engine Repair
Full engine diagnostics and repair on diesel-powered trucks. We fix what others can't diagnose.
Duramax Specialist
Deep expertise in every Duramax generation. LB7 injector failures to LML fuel system issues — we've seen it all.
Transmission Service
Allison and other diesel-spec transmissions. Fluid service, diagnostics, and full rebuild capability.
Diagnostics
Advanced scan tools and hands-on expertise to pinpoint the real problem fast. No guessing, no parts-throwing.
General Maintenance
Oil service, fuel filters, coolant flush, belt and hose inspection. Keep your diesel running at peak performance.
Diesel Truck Rebuilds
Full engine rebuilds done right. When you need the power back and nothing less than a full job will do.
WHAT THEY SAY
"Eli is the man. Diagnosed and fixed my duramax in short order. Very honest and great prices. He got me back on the road quickly."
"Eli and his team are simply the best. Very knowledgeable, professional, and most importantly honest. They specialize on duramaxes."
"Eli is one of the best guys out here in SoCal. Knows what he's doing and only produces quality work. Very reasonable prices."
"Great friendly owner and service. If you own a diesel truck, this is your best bet for knowledgeable, friendly service at a great price."
"Had an issue that the dealer couldn't fix. Came here and couple hours later problem solved."
YOUR TRUCK
CAN'T WAIT.
Diesel problems don't fix themselves. Call Eli today and get straight answers, fair prices, and your truck back where it belongs — on the road.
CONTACT & HOURS
Fontana, CA 92335