Frequently Asked Questions

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

• Confirm safety first: if the light is flashing, pull over and stop as soon as safe.
• Check the fuel cap for tightness — a loose or damaged cap is a common trigger on the 2025 GMC Savana Cargo 2500.
• Quickly inspect for visible issues: low oil, coolant leaks, unusual smoke or smells, or severe performance loss.
• If nothing obvious appears, schedule a dealer diagnostic. Repairs covered under warranty must be performed at a certified dealership to remain valid.
• Choosing Coggin Buick/GMC of Orange Park can deliver immediate and long-term savings versus independent shops while giving factory-trained technicians and documented service records.

What does it mean when the check engine light comes on in a 2025 GMC Savana Cargo 2500?

• It indicates an onboard diagnostic (OBD-II) code detected an emissions, engine, or sensor issue specific to the 4.3L V6.
• Codes range from minor items like EVAP leaks to serious problems like misfires that can damage the catalytic converter.
• Only a dealer-level scan provides the full factory code set and freeze-frame data for accurate diagnosis.
• If repairs are warranty-related, they must be completed at a certified dealership to ensure coverage; our factory-trained team ensures the work is done right.
• We often deliver lower total ownership cost by combining precise diagnostics, genuine parts, and lasting repairs that prevent repeat visits.

What is the most common reason for check engine light on a 2025 GMC Savana Cargo 2500?

• The most frequent causes are a loose fuel cap, oxygen sensor issues, or an EVAP system leak — all common on modern cargo vans.
• Misfires from spark or fuel problems are common and can escalate quickly if not addressed.
• Early dealer diagnostics prevent small issues from becoming expensive repairs such as catalytic converter replacement.
• Our service teams use factory diagnostics to pinpoint root causes and recommend the most cost-effective repair plan.
• Repairs under warranty must be performed at a certified dealership to retain coverage and ensure genuine parts are used.

How much does a check engine light diagnostic cost for a 2025 GMC Savana Cargo 2500?

• Diagnostic fees vary, but a dealer-level scan typically ranges from a modest flat-rate diagnostic fee to a slightly higher investment if advanced diagnostics are required.
• At Coggin Buick/GMC of Orange Park, we often cost less than independent shops when you factor in accurate diagnosis, genuine parts, and fewer follow-up visits.
• Immediate savings come from precise repairs the first time; long-term savings come from avoiding compounded damage and preserving fuel economy.
• If the issue is covered by warranty, those repairs must be completed at a certified dealership to qualify for coverage.
• Contact our service department for current diagnostic pricing and any available service specials to reduce your out-of-pocket cost.

How long does a check engine light service take?

• Initial diagnostic scans usually take 30–60 minutes; the scanner reads codes and captures freeze-frame data for the 2025 GMC Savana Cargo 2500's 4.3L V6.
• Simple fixes like tightening a gas cap or replacing a sensor can be completed the same day.
• Complex repairs—such as replacing catalytic converters or performing engine repairs—may require parts ordering and several hours to a day.
• Our dealership schedules efficiently and uses factory tools so many repairs finish faster than at independent shops, delivering immediate and long-term savings.
• Remember: warranty-covered repairs must be performed at a certified dealership to remain valid, and we keep full service records for resale value and peace of mind.