Left Front Solenoid Circuit Low (GM)
The C0577 code means the vehicle's onboard diagnostic system has detected: Left Front Solenoid Circuit Low (GM). This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $100 - $500 (diagnose before parts)
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What Are the Symptoms of C0577?
- Warning light on
- Behavior of the affected chassis system degraded
What Causes C0577? (Most Likely First)
- Fault in the chassis control component this code names (Left Front Solenoid Circuit Low) High
- Damaged wiring or a corroded connector in that circuit - road-splash zones corrode connectors High
- Failed related sensor or actuator Moderate
- Control module fault Low
Can I Still Drive with C0577?
Yes, but fix soon. C0577 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring the light.
Frequently Asked Questions
What does C0577 mean?
C0577 is a chassis code used primarily by GM vehicles: Left Front Solenoid Circuit Low. It concerns the chassis control system.
Can I keep driving with C0577?
Generally yes; the chassis control system may be degraded. Diagnose soon, and treat any brake- or steering-related behavior change as urgent.
Is C0577 the same on every make?
The decimal C0xxx range is dominated by GM's assignments (Chevrolet, GMC, Buick, Cadillac). Other makes may use this ID differently - if your vehicle is not a GM product, verify the meaning in your make's service information.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose C0577?
-
Read the code with a GM-capable scan tool and note the symptom byte/subcode if shown.
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View live data for the named circuit (e.g. all four wheel speeds while rolling for wheel-speed codes).
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Inspect the circuit's wiring and connectors - chassis harnesses live in the splash zone and corrode first.
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Follow the GM pinpoint test for C0577 before replacing components.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Which Vehicles Commonly Get C0577?
- Chevrolet, GMC, Buick, Cadillac (GM chassis code range)
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