Frequently Asked Questions

What is the most common reason for check engine light on a 2025 GMC Savana?

• Common causes include oxygen sensor faults, loose fuel caps, ignition misfires, and catalytic converter issues.
• Some causes reduce fuel economy or trigger failed emissions tests if ignored.
• Addressing codes quickly at our dealership often costs less over time than repeat independent-shop visits.
• Repairs covered under warranty must be completed at a certified dealership to maintain coverage.
• Our factory-trained technicians use OEM diagnostics to identify root causes and prevent recurring issues.

What does it mean when the check engine light comes on in a 2025 GMC Savana?

• It indicates the vehicle’s onboard diagnostics detected a fault in emissions, engine, or drivetrain systems.
• Codes range from minor (loose gas cap) to serious (misfires or catalytic converter failure) and require scanning to pinpoint.
• Getting a diagnosis at Coggin Buick/GMC of Orange Park ensures proper OEM testing and preserves any warranty benefits.
• Choosing dealership service delivers immediate and long-term savings through accurate repairs and genuine parts.
• We document repairs and resets so you get reliable fixes and fewer return visits.

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

• Start with simple checks: ensure the fuel cap is tightened and the gas cap seal is intact.
• If the cap is secure and the light persists, schedule a diagnostic scan with our certified technicians.
• Quick dealership diagnostics identify whether the issue is minor or requires immediate attention to avoid further damage.
• Warranty-covered issues must be repaired at a certified dealership to keep coverage valid—bring your Savana to us for covered work.
• We provide clear estimates and explain immediate and long-term cost benefits of factory-recommended repairs.

How much does a check engine light diagnostic cost for a 2025 GMC Savana?

• Diagnostic prices vary by location, but most scans fall within a reasonable range; our service advisors will provide transparent pricing up front.
• At Coggin Buick/GMC of Orange Park, accurate diagnostics and factory parts often translate into lower total cost compared with independent shops when factoring repeat repairs.
• We highlight immediate savings through correct first-time fixes and long-term savings via OEM parts and trained technicians.
• If a repair is covered under warranty, it must be completed at a certified dealership to remain valid.
• Check our service specials for current offers and scheduling options at /specials/service.htm.

How long does a check engine light service take?

• Basic diagnostics typically take about an hour, though time varies with complexity and parts availability.
• Simple repairs like replacing a gas cap or an oxygen sensor can often be completed the same day.
• More involved issues—such as misfires or catalytic converter service—require additional time for accurate repair and testing.
• Our dealership emphasizes efficient service scheduling and access to OEM parts to reduce downtime and long-term costs.
• For warranty repairs, having work performed at our certified service center preserves coverage and ensures correct procedure.