Mon – Fri 8:30AM – 6:00PM / Sat 8:30AM – 2:00PM

  • (281) 727-9374

  • Info@alltechdiesel.com

We give you Precision Truck Repair

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We Ensure Preventive Care for Maximum Performance

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The Best ECM Repair & Maintenance

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AllTech Diesel shop Houston Texas – certified diesel mechanics at work

Houston, TX  ·  Diesel Repair Specialists

Houston's #1
Diesel Truck
Repair & Diagnostics

AllTech Diesel is Houston's most trusted diesel repair shop — delivering precision ECM diagnostics, advanced engine repair, and custom ECU tuning for Cummins, Detroit Diesel, Caterpillar, Volvo and Paccar trucks. Owner-operators and fleet managers across Texas rely on us to keep their trucks on the road.

(281) 727-9374 Book Appointment
Certified Technicians
Fast Turnaround
Fleet & Owner-Operators
4.7★ Rated in Houston

Call Us Now

(281) 727-9374

Mon–Fri 8:30AM–6PM  ·  Sat 8:30AM–2PM

Free Diagnostic New customers — use code ATDMAR2026
Monday – Friday 8:30AM – 6:00PM
Saturday 8:30AM – 2:00PM
Sunday Closed
Call (281) 727-9374

Mon–Fri 8:30AM–6PM  ·  Sat 8:30AM–2PM

100%
Certified Technicians
4.7★
Verified Google Rating
10K+
Heavy-Duty Repairs
10+ Yrs
Serving Houston TX
99%
Satisfaction Rate
Our Advantage

Why Houston Trusts AllTech Diesel

The choice of Houston's owner-operators, trucking companies and fleet managers — delivering technology-driven diagnostics, factory-grade repairs and transparent pricing across Houston, Texas.

Fully Certified Diesel Technicians

Every technician on our team is fully certified and carries deep hands-on experience with all major diesel platforms — Cummins, Detroit Diesel, Caterpillar, Volvo, Mack and more.

Minimal Downtime, Maximum Uptime

Every hour your truck sits is revenue lost. Our streamlined diagnostic-to-repair workflow gets you back on the road faster than any other shop in Houston, TX.

OEM-Grade Diagnostic Technology

We use OEM-grade ECM scanners and the same computerized diagnostic equipment used by manufacturer dealerships — pinpointing faults precisely the first time, every time.

Houston's Most Trusted Shop

Over a decade serving Houston's diesel operators. A 4.7-star Google rating backed by hundreds of verified reviews. Owner-operators and fleet companies across Texas choose AllTech Diesel because we deliver — every time.

AllTech Diesel certified technician diagnosing diesel truck engine Houston Texas
10+Years Serving
Houston, TX
Who We Are

Built for the Road Ahead

AllTech Diesel was founded in Houston, Texas with one mission: give commercial truck drivers and fleet operators access to dealer-level diagnostics and repairs — without the dealer price tag or the runaround.

For over 15 years, we've been the go-to diesel repair shop for owner-operators and fleet managers across Houston and the greater Texas region. Our shop is equipped with advanced ECM scanning systems, OEM-spec tooling, and technicians who live and breathe diesel engines.

  • Transparent, line-item quotes — no hidden charges, ever
  • All major diesel brands: Cummins, Detroit, CAT, Volvo, Mack, Paccar
  • Repairs backed by written service warranty
  • Dedicated fleet management programs for multi-truck operators
  • Located in Houston, TX — serving the entire Gulf Coast region
10+Years in Houston
10K+Diesel Jobs Done
99%Customer Satisfaction
Our Full Story

We Service All Major Diesel Brands

Cummins
Detroit Diesel
Caterpillar
Volvo
Mack
Paccar
International
Mercedes-Benz
Freightliner
Kenworth
Peterbilt
Isuzu
Hino
How It Works

Our Repair Process

A transparent, technology-driven process built around accountability — designed to get your diesel truck back on the road with zero surprises, on time, every time.

01

Contact Us

Call or submit online. We respond fast and gather every detail needed to prepare.

02

ECM Inspection

Full OEM-grade ECM scan and physical inspection to pinpoint the root cause.

03

Written Estimate

Itemized written quote with no surprises. Work only begins after your approval.

04

Expert Repair

Certified diesel mechanics execute repairs using OEM-spec parts and proven methods.

05

Quality Sign-Off

Multi-point post-repair inspection before any truck leaves our facility.

06

Back on the Road

Truck returned on schedule, road-ready, with full service documentation and warranty.

What We Do

Diesel Repair Services Houston TX

Comprehensive ECM diagnostics, diesel engine repair, DPF solutions, custom ECU tuning and fleet maintenance for commercial trucks and heavy equipment throughout Houston, Texas.

Houston, TX

ECM Diagnostics Houston TX

OEM-grade Electronic Control Module scanning to diagnose engine faults, transmission issues and performance problems with precision. We read every fault code your truck throws — the first time, every time.

  • Check engine light & fault code reading
  • Engine performance drops & idle issues
  • Poor fuel economy & excessive smoke
  • Hard start, no start, unexpected shutdowns
  • Transmission & drivetrain complications
Detroit DDEC III–V Cummins ISX/X15 CAT C7–C16 Volvo & Mack Paccar · Isuzu International · Hino
ECU Reprogramming

Custom ECU Tuning & Calibration

Precision ECU reprogramming performed entirely through a diagnostic connector — no engine disassembly required. Our chip tuning process improves acceleration, power output and fuel efficiency while keeping your truck within OEM specifications.

  • Improved fuel economy — reduce operating costs
  • Increased power output & acceleration
  • Higher load capacity & torque curve optimization
  • Stable, consistent engine speed under load
  • Zero engine disassembly — scanner-only process
Scanner-only tuning OEM-compliant
EPA Compliant

DPF Filter Solutions Houston

Expert Diesel Particulate Filter cleaning, regeneration, deactivation and ECM reprogramming. Your truck returns to EPA compliance immediately after service — avoiding costly DPF replacements and preventing long-term engine damage.

  • DPF warning light or check engine light active
  • Sudden loss of power under acceleration
  • High exhaust opacity — visible smoke
  • Failed forced DPF regeneration cycles
  • Elevated engine oil level (fuel dilution)
Prevents engine damage Computerized system
All Major Brands

Diesel Engine Repair Houston

Complete diagnosis and repair for every major diesel engine platform. Whether it's a minor sensor fix or a full engine overhaul, our certified diesel mechanics use OEM-spec components and manufacturer-approved procedures to restore your engine to factory performance.

Cummins Detroit Diesel Caterpillar International Volvo Mercedes-Benz Freightliner Kenworth
Recommended

Preventive Maintenance

Proactive scheduled maintenance keeps your diesel truck performing at peak efficiency and prevents costly emergency breakdowns. Our comprehensive maintenance protocol includes ECM health checks, oil service, filter replacements, fuel system inspection and full system reviews.

  • Extends ECM and engine lifespan significantly
  • Prevents major failures — reduces total repair cost
  • Detects developing faults before they cause breakdowns
  • Maximizes fuel efficiency & driver safety
Fleet Program

Fleet Maintenance Houston TX

Custom-built fleet maintenance programs for Houston's trucking companies and logistics operators. We maximize uptime, cut operating costs and extend vehicle lifespan — so your fleet keeps moving and your business keeps growing.

Custom service plans Priority scheduling Dedicated account rep Multi-truck discounts

For Fleet Operators

Running a Fleet in Houston?
We've Got You Covered.

Houston's most trusted fleet diesel maintenance partner. We build customized service schedules for operators running 2 trucks or 200 — priority service, dedicated scheduling and transparent fleet pricing designed to keep your operation moving.

Priority Scheduling
Dedicated Account Manager
Volume Discounts
Real-Time Service Updates
Preventive Maintenance Plans
Full Service Documentation
Call (281) 727-9374 Request Fleet Quote

Free consultation for fleet operators — no commitment required

What Our Customers Say

Trusted by Houston's Diesel Operators

4.7
★★ ★★ ★
Houston, TX · Google
G Google Reviews
★★★★★

"Very good place — they tested my computer at no charge. The diagnostic was excellent. They cleared up my doubts when other shops couldn't even tell me what the problem was."

AM
Adan Molina
Local Guide · 63 reviews · Houston, TX
G ✓ Verified Google Review
★★★★★

"The technicians were excellent at finding the problem and the office staff was very friendly — they made sure I was comfortable while I waited. A great place to bring your truck!"

JR
Javier Rosario
5 reviews · Houston, TX · 1 month ago
G ✓ Verified Google Review
★★★★★

"Excellent service and excellent results on the work they did for me. You can go with confidence — they deliver on their promises."

EC
Eduardo Calderin
Houston, TX · 4 months ago
G ✓ Verified Google Review
★★★★★

"Very good at what they do — helpful and super talented. I highly recommend them. The only thing I'd suggest is fixing the access road, it's a bit rough. But for the work itself, absolutely recommended!"

AS
Adalberto Suarez Quesada
Local Guide · 100 reviews · 1 year ago
G ✓ Verified Google Review
★★★★★

"Great work and fast turnaround — I recommend them for any electrical problem on your truck. They are truly very good. 🙏🏻👍"

ZP
Zayda Peralta
Local Guide · 32 reviews · 1 year ago
G ✓ Verified Google Review
★★★★★

"Great service, knowledgeable technician and reasonable cost in parts and labor. I was diagnosed, fixed and tested within a few hours."

GL
Google Local User
Houston, TX
G ✓ Verified Google Review
Limited Time Offers

Monthly Promotions

Exclusive deals for new and returning customers in Houston, TX. Mention your promo code when scheduling your appointment to redeem.

New Customers

First-Time Customers

FREE
ECM Diagnostic

Complete OEM-grade ECM scan and truck inspection at no charge. Bring your truck in and let our certified diesel mechanics identify the problem — on us.

ATDMAR2026 Mention this code

Valid through March 2026

Loyal Customers

Returning Customers

FREE
ECM Diagnostic

We value your loyalty. Returning customers receive a complimentary ECM diagnostic scan on their next visit. Your trust means everything — no strings attached.

ATDMAR2026 Mention this code

Valid through March 2026

Fleet Operators

Free Fleet
Consultation

Running 2 trucks or more in Houston? Get a free fleet maintenance consultation and a customized service plan proposal — no commitment required.

Call to Schedule

Available year-round

Expert Diesel Mechanic
in Houston, TX

When your diesel truck needs repair in Houston, Texas, AllTech Diesel is the shop that owner-operators and fleet managers call first. We specialize in ECM diagnostics and diesel truck repair for all major commercial truck platforms — from Cummins and Detroit Diesel to Caterpillar, Volvo and Paccar engines.

Our facility at 4215 Guessena St., Houston TX is equipped with the same OEM-grade electronic diagnostic systems used by manufacturer service centers — allowing us to pinpoint faults faster, repair them right the first time, and get your truck back on the road with minimal downtime.

Whether you're an individual owner-operator or manage a fleet of 50+ commercial trucks across Texas, AllTech Diesel has the experience, technology and team to handle your service needs efficiently and professionally.

Houston TX Harris County Pasadena TX Baytown TX Deer Park TX La Porte TX Texas City TX Greater Houston Area

Cummins & Detroit Diesel
Repair Houston TX

AllTech Diesel is Houston's most trusted specialist for Cummins engine repair and Detroit Diesel repair. Our technicians have deep hands-on experience with ISX, ISM, ISC and X15 Cummins engines as well as Detroit DDEC III, IV and V series platforms.

From injector failures and turbocharger issues to EGR system problems and full engine overhauls, our diesel mechanics in Houston, TX handle it all — with OEM-spec components, written estimates and a service warranty on every repair.

If you're searching for "diesel truck repair near me" or a reliable diesel mechanic in Houston, call AllTech Diesel at (281) 727-9374. We serve the entire greater Houston metropolitan area and have a fast-turnaround process designed specifically for commercial truck operators who can't afford extended downtime.

Get Started Today

Schedule Your Appointment

Fill out the form and our team will confirm your appointment within 24 hours. Serving Houston, TX and surrounding areas. New customers — use code ATDMAR2026 for a free diagnostic.

We confirm within 24 hours · No payment required to book · Free cancellation
Find Us

Contact AllTech Diesel

Located in Houston, Texas — serving owner-operators and fleet companies across the greater Houston area and Gulf Coast region.

Our Location

4215 Guessena St., Houston TX

Houston, Texas, United States — Get Directions →

Call Our Houston Shop

(281) 727-9374

Mon–Fri 8:30AM–6PM  ·  Sat 8:30AM–2PM

Email

Info@alltechdiesel.com

Typical response within a few hours · Available for fleet inquiries

Business Hours — Houston TX

Mon–Fri: 8:30AM–6PM  |  Sat: 8:30AM–2PM

Sunday: Closed  ·  Book online anytime

AllTech Diesel — Live Support
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