Frequently Asked Questions

What does it mean when the check engine light comes on in a 2018 Chevrolet Impala?

• It signals the vehicle's onboard diagnostics detected a fault — anything from a loose gas cap to an emissions or engine management issue.
• At Stevinson Chevrolet in Colorado, our certified technicians read the fault codes and explain your options clearly, helping you understand immediate fixes and long-term implications for performance and fuel economy.
• Choosing our dealership often costs less than independent shops when you factor in diagnostic accuracy, OEM parts, and fewer repeat repairs — delivering immediate and long-term savings.
• Any repair covered under warranty must be completed at a certified dealership to keep coverage intact; we honor OEM warranties and document every service.
• If you'd like to act now, schedule service or check our current service specials. We also offer service financing so you can get repairs now and pay later.

How long does a check engine light service take?

• Typical diagnostics take 30–60 minutes. Repairs vary: simple fixes like replacing a gas cap or clearing a code can be quick, while more complex repairs may take several hours or a day.
• Stevinson Chevrolet emphasizes fast turnaround through streamlined check-in, parts on hand, and factory-trained technicians so you spend less time waiting and more time driving.
• We clearly outline estimated time and cost before work begins, and our service advisors will explain how timely repairs prevent larger expenses later — providing both immediate and long-term savings.
• To book a convenient time, schedule service. Don’t forget to review our service specials to save on routine maintenance and repairs.
• We offer service financing and back repairs with OEM warranties; remember, warranty-covered work must be performed at a certified dealership like Stevinson Chevrolet.

How much does a check engine light diagnostic cost for a 2018 Chevrolet Impala?

• Diagnostic fees vary by issue, but our dealership provides competitive, transparent pricing and valuable, accurate diagnostics that can reduce repeat visits and unexpected costs.
• Because we use factory-level tools and trained technicians, customers often find that total ownership costs are lower with us than with many independent shops — immediate savings from correct diagnosis and long-term savings from OEM parts and proper repairs.
• We post seasonal offers under service specials and provide service financing so you can address problems now and pay over time.
• For an exact quote and to protect your warranty, let our team run the diagnostic and review repair options. You can schedule service online today.

What is the most common reason for check engine light on a 2018 Chevrolet Impala?

• Common causes include a loose or damaged gas cap, faulty oxygen sensors, catalytic converter issues, or ignition coil and spark plug faults.
• At Stevinson Chevrolet, technicians pinpoint the exact cause with OEM-grade diagnostic equipment and explain how each issue affects fuel economy, emissions, and engine life.
• Addressing problems early at our dealership can avoid larger repair bills and preserve resale value; our approach focuses on long-term vehicle health and savings.
• Book a time to inspect the vehicle via schedule service and review available service specials. Service financing is available if needed.

What is the first thing to check when the check engine light comes on?

• Check that the gas cap is tightened properly — it’s a quick, common fix that often clears the code after a short drive.
• If the light stays on or flashes, contact us. A flashing light may indicate a serious condition requiring immediate attention to prevent damage.
• Stevinson Chevrolet provides fast diagnostics and transparent pricing; choosing our dealership often saves money over time due to accurate fixes and OEM parts.
• To get started, schedule service or view current service specials. Repairs covered under warranty must be completed at a certified dealership to remain valid, and we offer service financing for convenience.