Strange noises, warning lights, or a car that just isn't running right? Our dealer-grade diagnostics find the real problem the first time.
Today's vehicles have dozens of control modules and hundreds of sensors. When something goes wrong, accurate diagnosis is everything — and it's where most of your repair savings come from.
Blackstone invests in the same scan tools and software the dealerships use, plus years of hands-on experience across every major brand. Whether it's an intermittent electrical gremlin, a drivability complaint, or a warning light, we methodically trace it to the source so your repair is right the first time.

If it has a sensor, we can test it.
Check engine, ABS, airbag, TPMS, and traction lights.
Parasitic drains, shorts, and dead-circuit tracing.
Crank/no-start, intermittent stalling, hard starts.
Hesitation, surging, poor fuel economy.
CAN-bus communication and control-module faults.
Pinpointing the source of unexplained symptoms.

Bring it in any time your car is doing something it shouldn't:
Nationwide TechNet warranty on parts & labor — covered even when you travel.
Factory-level training and dealer-grade tools for every make and model.
We never start work without your OK — clear written estimates, no surprises.
A complimentary digital inspection with photos comes with every visit.
We confirm your symptoms and gather history.
Dealer-grade tools plus hands-on component testing.
We isolate the exact failure, not just the system.
A plain-English explanation and an honest estimate.
Let our diagnostic experts pinpoint it — accurate answers save you money on parts you don't need.
A code read (often free at parts stores) just lists trouble codes. A real diagnostic uses those codes as a starting point, then tests the actual components and circuits to find what truly failed — which is what prevents wasted money.
Yes. Electrical and network diagnostics are one of our specialties — parasitic battery drains, intermittent shorts, module communication faults, and wiring issues.
Yes, we service and diagnose hybrid and electric vehicles with the proper tools and safety procedures.
In most cases, yes — if you have us perform the repair, the diagnostic charge is applied to the work. We'll explain it upfront.
What a proper diagnosis costs — and why the free parts-store code read isn't one.
