We Diagnose. We Don't Upsell Repairs.
Glass Box Diagnostics was founded on a simple belief: vehicle owners deserve to know exactly what's wrong with their car before spending thousands on repairs. No pressure. No hidden agenda. Just expert diagnostics and the facts you need to make informed decisions.
Transparent Diagnostics for Every Vehicle Owner
The automotive repair industry has a fundamental conflict of interest: shops that diagnose problems also profit from fixing them. This creates pressure to find “additional issues” and recommend unnecessary repairs.
Glass Box Diagnostics removes this conflict entirely. We are a diagnostic-only company. We don't sell parts. We don't perform repairs. We don't have service writers on commission. Our only incentive is finding the actual problem correctly the first time.
Every diagnostic includes a comprehensive digital report with root cause analysis, a prioritized repair path, complexity ratings, and supporting evidence. You can take this report to any repair shop, dealership, or use it for DIY repairs. The data is yours forever.
Diagnostic Laboratory on Wheels
Factory scan tools • Oscilloscopes • J2534 Programming • Network Analyzers
Principles That Guide Every Diagnostic
These aren't just words on a wall - they're the standards we hold ourselves to on every job.
Transparency First
We provide complete diagnostic findings with no hidden agenda. You see exactly what we see.
Accuracy Over Speed
We take the time to find the root cause, not just clear codes. Correct diagnosis saves money.
Education Focused
We explain findings in plain language so you understand your vehicle's health.
No Conflict of Interest
We don't sell parts or repairs. Our only product is the truth about your vehicle.
Continuous Learning
Our technicians train weekly on new vehicle systems, tools, and diagnostic techniques.
Community Driven
We build long-term relationships with customers, shops, and fleet partners based on trust.
Master Technicians & Engineers
Combined 80+ years of diagnostic experience across dealerships, OEM engineering, and independent shops.
Trent
Owner & Diagnostician
I'm Trent — a one-man team passionate about automotive diagnostics. I bring factory-level tools directly to you, diagnose the problem, and give you a crystal-clear report so you can make informed decisions. No upsell, no pressure, just the facts.
From One Van to a Diagnostic Network
Founded
Trent started Glass Box Diagnostics in the Texas Hill Country
1,000 Vehicles
Diagnosed 1,000+ vehicles with 98% satisfaction
Platform Launch
Customer portal, digital reports, online booking
Fleet & Shop Programs
Expanded to B2B with fleet contracts and shop partnerships
Expanded Service Area
Serving Canyon Lake, San Antonio, Austin, New Braunfels and surrounding areas
AI Diagnostic Assistant
Launched rule-based service selection and case comparison
Ready for Honest Diagnostics?
Book your diagnostic appointment today. Mobile service available 7 days a week. Transparent pricing. No surprises.