Se habla español — We speak Spanish.

Diesel & Auto Repair in Moore, TX — I-35

24-hour drop-off is available for emergency and wrecker drop-offs; please arrange the gate code with the shop.

Certified Diesel is your Moore, TX shop for honest, dependable diesel and auto repair. We serve trucks, fleets, Class 8 and commercial vehicles, passenger vehicles, and American and import gas engines. Expect clear diagnostics, thoughtful communication, and fair pricing.

BRANDS WE SERVICE

Cummins • Power Stroke • Duramax • Caterpillar • MaxxForce • Paccar • Detroit Diesel • American & import gas engines

SERVICES

• Diesel diagnostics & repair

• • Fuel systems and injectors

• • Brakes, A/C and electrical

• • Pickup, fleet and Class 8 / commercial service

• • General auto repair

• • Honest estimates, with photos when useful

•  Class 8 semis, fleet trucks and trailers

• Parameter Changes

• Speed limits, idle shutdown, cruise and PTO settings adjusted with dealer-level software for most heavy-duty and light-duty diesels.

• Forced Regens & Aftertreatment

• Forced/parked DPF regens, aftertreatment resets, and DEF/NOx diagnostics to get you back on the road.

ABOUT CERTIFIED DIESEL

We believe in integrity, thorough diagnostics, clear communication, and fair pricing. We take the time to understand the problem, explain the options, and keep you posted while your vehicle is in the shop.

WHY US

• Honest answers and practical recommendations

• • Careful diagnostics before parts are replaced

• • Communication throughout the repair

• • Service for work trucks, fleets and everyday vehicles

CUSTOMER REVIEWS

4.7 · 38 Google reviews

Robert Martinez — ★★★★★

“We needed work done to our truck and the shop was able to get our repairs done. They showed us all the issues needed to be addressed and kept us posted with details on the repairs.”

Chris At home — ★★★★★

“Great Experience with Robert at Certified Diesel. He has the Experience and takes the time to truly chase down and find the underlying roots to any mechanical issues. Highly recommend.”

Charles Brobst — ★★★★★

“Great service reasonably priced”

Alex Ramon — ★★★★★

“Robert at Certified Diesel is a very nice and courteous person he is super knowledgeable of Diesel trucks”

David Vasquez — ★★★★★

“Robert is an awesome mechanic, found issues that other mechanics couldnt find. From dropping off my vehicle, to diagnosing, to ordering part and making the repairs, the turnaround time was extremely fast.”

Edwile Mbameg — ★★★★

“I can vouch for two key aspects of Robert’s character: his technical expertise and his kindness. He successfully fixed a problem with my truck that had been troubling me for a while.”

Katie Hinkle — ★★★★★

“We are new to the area and were pleased to find Certified Diesel. Robert was very professional and provided expedient service.”

Daniel Leal — ★★★★★

“The team at Certified Diesel is among the best. I've taken my BMW to many car places but have to recommend Certified Diesel for honest, efficient work.”

PHOTO GALLERY

See our Photos page for exterior, shop, technician and engine-work images.

info@certifieddieseltx.com

CONTACT

17017 N. Interstate 35 / IH 35 Frontage Rd, Moore, TX 78057

Call 210.878.7680

certifieddieseltx@gmail.com

robert@certifieddieseltx.com

Hours: Monday–Friday 8:30 AM–5:30 PM; Saturday–Sunday Closed

GET DIRECTIONS

Find us on I-35 in Moore, TX. We welcome diesel, fleet, commercial, pickup, passenger, American and import vehicles.

SE HABLA ESPAÑOL

Certified Diesel es un taller de reparación de diesel y camiones en la I-35 en Moore, TX. Trabajamos en camiones Clase 8, flotillas, camiones agrícolas, remolques y pickups diesel. Diagnóstico y programación a nivel de concesionario, cambios de parámetros, regeneraciones forzadas, frenos de aire, instalación de PTO e hidráulicos, y reparación de remolques. ¿Se descompuso en la I-35? Ofrecemos entrega las 24 horas para emergencias y grúas. Llámenos al 210.878.7680.