Frequently Asked Questions

What does it mean when the check engine light comes on in a 2021 Chevrolet Silverado 3500HD?

• It signals a detected fault in the emissions, ignition, fuel, or exhaust systems — it can range from a loose gas cap to a failing sensor or catalytic converter.
• At Larry H. Miller Casa Chevrolet in Albuquerque, NM, our certified technicians use OEM-level diagnostics to identify the exact fault quickly and accurately, helping you avoid unnecessary repairs and long-term damage.
• We often cost less than independent shops while offering factory-trained techs, OEM parts, and transparent estimates — delivering immediate and long-term savings.
• Repairs covered under warranty must be performed at a certified dealership to remain valid; we’ll explain warranty coverage and recommend solutions that protect your vehicle’s longevity.
• To get a prompt inspection, schedule service online or review our current service specials before you come in.
• We offer service financing so you can get critical repairs now and pay later, preserving safety and avoiding compounding damage.

How long does a check engine light service take?

• Diagnostic times typically range from 30 minutes to a few hours depending on the issue; simple code reads are fast, while repairs vary by required parts and labor.
• Larry H. Miller Casa Chevrolet focuses on speed and accuracy: same-day diagnostics are common, and we communicate timelines clearly so you know when your 2021 Chevrolet Silverado 3500HD will be ready.
• Our service lanes are equipped for efficient workflow, and we stock many OEM components to minimize waiting time and long-term costs.
• Scheduling ahead saves time — schedule service online and check our service specials to maximize value.
• Remember we offer service financing and warranty-backed repairs, which helps you avoid deferred maintenance that can be more expensive later.

How much does a check engine light diagnostic cost for a 2021 Chevrolet Silverado 3500HD?

• Prices depend on diagnostic depth, but our pricing is transparent and competitive; we frequently cost less than independent shops while delivering OEM-level expertise.
• Choosing Larry H. Miller Casa Chevrolet means you get a full diagnostic with detailed findings, repair recommendations, and an estimate that emphasizes immediate and long-term savings.
• If your repair is warranty-covered, it must be completed at a certified dealership to remain valid — we’ll handle warranty verification and documentation for you.
• To discuss pricing or to set up an inspection, schedule service or consult our current service specials for discounted diagnostic and repair packages.
• We also offer service financing so you can authorize necessary repairs now and manage payments over time without sacrificing vehicle health.

What is the most common reason for check engine light on a 2021 Chevrolet Silverado 3500HD?

• The most frequent causes include faulty O2 sensors, loose gas caps, misfires, or EVAP system faults — each can trigger a code that our technicians read and interpret precisely.
• Ignoring these warnings can lead to reduced fuel economy, increased emissions, or more extensive engine or exhaust system damage that raises overall ownership costs.
• At Larry H. Miller Casa Chevrolet in Albuquerque, our certified techs diagnose the root cause, recommend OEM repairs, and explain how the service preserves resale value and long-term reliability.
• We provide transparent pricing, warranty protection, and service financing options, helping you choose the most cost-effective course of action.
• To prioritize safety and prevent costly follow-on damage, schedule service today and check our service specials.

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

• Start with obvious items: ensure the gas cap is tight; a loose cap is a common trigger and often a quick fix.
• If the light persists, or if you experience loss of power or a flashing light, you should seek a professional diagnostic from Larry H. Miller Casa Chevrolet right away.
• Our technicians use OEM-grade scanners and follow manufacturer procedures to preserve warranty coverage and vehicle health, which often results in lower lifetime costs compared with deferred fixes.
• We make scheduling easy—schedule service online, review our service specials, and ask about service financing to get repairs done promptly without financial stress.