Frequently Asked Questions

What does it mean when the check engine light comes on in a 2020 Chevrolet Silverado 3500HD?

• It indicates the vehicle’s onboard diagnostics have detected an issue — anything from a loose gas cap to a misfire that can harm the catalytic converter.
• At Larry H. Miller Casa Chevrolet in Albuquerque, our certified technicians use factory-grade scan tools to pinpoint the exact code and recommend OEM repairs that extend vehicle life.
• Repairing issues early often reduces long-term costs and improves reliability; we highlight immediate and long-term savings when comparing repair options.
• We offer service financing so you can get needed repairs now and pay later, and any warranty-covered repairs must be performed at a certified dealership to remain valid.
• Ready to act? schedule service online to get fast diagnostics and transparent estimates.

How long does a check engine light service take?

• Diagnostics typically take between 30 and 90 minutes depending on the issue and any road tests needed; more complex repairs will take longer and we provide clear time estimates up front.
• Larry H. Miller Casa Chevrolet prioritizes quick turnarounds in Albuquerque by keeping common OEM parts in stock and using factory-trained technicians for efficient, accurate repairs.
• We offer loaner options, comfortable waiting areas, and service updates so you can plan your day while we work on your 2020 Chevrolet Silverado 3500HD.
• Check our current service specials for savings on diagnostics and parts, and remember we provide service financing to help with unexpected costs.

How much does a check engine light diagnostic cost for a 2020 Chevrolet Silverado 3500HD?

• Diagnostics at Larry H. Miller Casa Chevrolet often start at $89.25, and that price reflects factory-grade scanning, code interpretation, and a written estimate.
• We often cost less than independent shops while delivering a higher level of service — OEM parts, certified technicians, and clear warranty protection — offering both immediate and long-term savings.
• If the repair is covered under warranty it must be completed at a certified dealership to preserve coverage; we’ll explain coverage and options before any work begins.
• To save, check our service specials and schedule service online for a convenient appointment.

What is the most common reason for check engine light on a 2020 Chevrolet Silverado 3500HD?

• Common causes include misfires, oxygen sensor faults, catalytic converter efficiency issues, and EVAP system leaks — each has different consequences if left unaddressed.
• Our technicians at Larry H. Miller Casa Chevrolet in Albuquerque diagnose the root cause so you avoid repeat visits and costly downstream damage, such as catalytic converter failure.
• We emphasize preventive care and will discuss repairs that maximize uptime and minimize lifetime service costs for your truck.
• Book a transparent inspection today — schedule appointment online or review our service specials for savings.

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

• Start with a visual check: secure gas cap, obvious fluid leaks, or loose wiring — but don’t rely on guesswork for modern vehicles.
• Bring the 2020 Chevrolet Silverado 3500HD to Larry H. Miller Casa Chevrolet so certified technicians can run a proper diagnostic scan and provide a clear repair plan.
• We explain repair urgency, cost estimates, and warranty status; repairs covered under warranty must be done at a certified dealership to remain valid.
• Use our online tools to schedule service or check current service specials before your visit.