Transparent Vehicle Diagnostics
Without the Upsell
We diagnose. We explain. You decide. Expert mobile diagnostics at your location with detailed digital reports you can take to any repair shop. No hidden agenda - just the facts.
ASE Certified Technicians
OEM Tool Coverage
No Upsell Guarantee
Customer Satisfaction
Average Response Time
Vehicles Diagnosed
Why Choose Glass Box Diagnostics?
We're not a repair shop. We're a diagnostic laboratory on wheels. Our only product is the truth about your vehicle.
No Conflict of Interest
We don't sell parts or repairs. Our only incentive is finding the actual problem correctly the first time.
We diagnose. We don't upsell repairs.
Factory-Level Capability
OEM scan tools, J2534 pass-thru programming, oscilloscopes, and dealer-level database access for 40+ brands.
Dealer tools without dealer prices.
Your Data, Your Decisions
You own your vehicle's diagnostic history. Share reports with any shop, get second opinions, or DIY with confidence.
Transparent reports any tech can follow.
Complete Diagnostic Capabilities
From basic code reads to complex network diagnostics, we cover every system in your vehicle.
7 Steps to Clarity
From mystery symptom to actionable repair plan in one seamless process.
Select Vehicle & Problem
Enter your VIN or vehicle details and describe the symptoms you're experiencing.
Step 01 Visualization
Provide Details
Share warning lights, recent repairs, diagnostic codes, and when the issue occurs.
Step 02 Visualization
Get Service Recommendation
Our AI assistant analyzes your input and recommends the exact diagnostic service needed.
Step 03 Visualization
Schedule Appointment
Choose mobile service at your location or drop-off at a partner shop. Real-time availability.
Step 04 Visualization
Diagnostic Process Begins
Our technician performs systematic testing using factory tools and procedures.
Step 05 Visualization
Receive Professional Report
Get a detailed digital report with root cause, repair path, priority, and complexity rating.
Step 06 Visualization
Complete Repairs Anywhere
Use our findings to get repairs done at any shop, dealer, or DIY. We don't do the repairs.
Step 07 Visualization
Ready to Know What's Wrong?
Book your diagnostic appointment today. Mobile service available 7 days a week. Transparent pricing. No surprises.
Available in Canyon Lake, San Antonio, Austin, New Braunfels, San Marcos & surrounding areas
Mobile Service
We come to you - home, work, or roadside
7-Day Availability
Appointments Monday through Sunday
Satisfaction Guaranteed
If we can't diagnose it, you don't pay