The typical replacement interval for most Chevy Equinox models with modern long-life plugs is about 100,000 miles under normal driving. If your model uses copper plugs or older configurations, you may need to replace closer to 60,000 miles. Always check your owner's manual for the exact recommendation for your engine and plug type.
What the manufacturer recommends
General guidance from GM for Equinox models with long-life, iridium or platinum plugs is to target about 100,000 miles between changes under normal conditions. Copper plugs or traditional designs are commonly shorter, often around 60,000 miles. Exact intervals can vary by model year and engine configuration, so referencing the owner’s manual or a dealership service bulletin for your exact car is wise, especially if you regularly tow, drive in harsh conditions, or frequently do a lot of short trips.
Engine variants and plug types in the Equinox
2.4L Ecotec four-cylinder
Used in many base and mid-range Equinox models across a broad span of years. When equipped with long-life platinum or iridium plugs, the interval is commonly around 100,000 miles. Copper plugs, which are less common in newer builds, typically require earlier replacement, around 60,000 miles. Direct-injection variants may call for additional attention to carbon buildup and should follow the manufacturer’s schedule.
3.6L V6
In later years, the Equinox offered a 3.6L V6. Spark plug intervals are generally similar to the 2.4L with long-life plugs (about 100,000 miles). If copper plugs are used, expect shorter intervals around 60,000 miles. As with other engines, direct-injection configurations can influence maintenance needs and carbon buildup considerations.
Replacement intervals by plug type
The following guidance reflects typical expectations for plug material and engine configuration in the Equinox. Your exact interval may vary by model year and driving conditions.
- Iridium or platinum long-life plugs: about 100,000 miles (160,000 km) under normal driving.
- Copper or traditional plugs: commonly around 60,000 miles (96,000 km); some older or differently equipped models may be shorter, 30,000–40,000 miles.
- Direct-injection engines: intervals often align with long-life plugs, but carbon buildup risks can make inspections worthwhile before 100,000 miles if you drive many short trips or city-cased driving.
In short, most Equinox owners who have long-life plugs can plan for a 100,000-mile replacement interval, while copper-plug configurations typically require earlier changes.
Signs that spark plugs need replacement
Keep an eye out for indications that the spark plugs are worn or failing and may need replacement sooner than the planned interval.
- Rough idle or engine misfires, especially at startup or idle.
- Decreased performance or slower acceleration, particularly under load.
- Lower fuel economy or higher emissions.
- Engine knocking or pinging sounds, or trouble starting.
- Worn ignition coils/boots or visible wear on plug wells in older ignition systems.
- Check Engine Light with misfire codes such as P0300–P0304.
If you notice these symptoms, it’s a good idea to have the plugs inspected sooner rather than later, even if you’re near or below your planned interval.
DIY vs professional service
Replacing spark plugs on many Equinox engines is a manageable DIY task for a capable home mechanic, especially with the right tools and torque specifications. Some engines, however, require additional disassembly or special procedures to reach the plugs, and ignition coils, boots, or direct-injection components may also be involved. If you’re unsure about the process, or if your model year has particular access or torque requirements, a professional technician can ensure the job is done correctly and safely.
Summary
For most Chevy Equinox models with modern long-life plugs, plan on changing spark plugs around 100,000 miles. If your vehicle uses copper plugs or older configurations, consider a shorter interval, around 60,000 miles. Driving conditions, engine type, and maintenance history can affect the schedule, so always verify with your owner’s manual and monitor for signs of wear. Regular inspection and timely replacement help preserve performance and efficiency.