A check engine light on your Chevrolet is a stored fault code that needs GM's GDS2 diagnostic platform for accurate diagnosis. GDS2 accesses the complete fault memory across every module, provides live sensor data, and allows bidirectional component testing that aftermarket scan tools cannot perform.
Oxygen sensor failures are common on higher-mileage Equinox and Silverado models. EVAP system faults frequently start with a loose gas cap. Active Fuel Management lifter faults appear on older V8 Silverado engines. Catalytic converter efficiency codes typically appear above 80,000 miles. Cold-weather ignition coil failures are more common in Wisconsin winters.
A steady check engine light means a fault is stored. Schedule service within a few days. A flashing light means an active engine misfire. Reduce speed, avoid hard acceleration, and call 414-797-1288 immediately.
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Saturday 8:00 AM to 4:00 PM
1500 W Silver Spring Drive, Milwaukee, WI 53209.
