2022 Chevrolet Silverado 1500 Spark Plug Type & Gap

Quick reference

Engine	OEM Plug PN (ACDelco)	Aftermarket (NGK/Denso/Motorcraft)	Gap (in/mm)	Torque (lb-ft / Nm)	Interval (miles)
2.7L L3B Turbo	Not Applicable	NGK: LTR6BP11-8 / Denso: N/A	0.035 / 0.9	13 / 18	45,000
5.3L L84 V8	41-162	NGK: ILTR5B11/Denso: 90130	0.040 / 1.0	15 / 20	97,500
6.2L L87 V8	41-162	NGK: ILTR5B11/Denso: 90130	0.040 / 1.0	15 / 20	97,500

Why the right plug matters

Choosing the correct spark plug for your 2022 Chevrolet Silverado 1500 is crucial for optimal engine performance, fuel efficiency, and longevity. Spark plugs are not a universal component; they are carefully engineered to match specific engine requirements.

Heat Range

The "heat range" of a spark plug refers to its ability to dissipate heat from the combustion chamber. A plug that's too hot (meaning it dissipates heat slowly) can lead to pre-ignition and detonation, causing engine damage. A plug that's too cold (dissipates heat too quickly) can foul with carbon deposits, leading to misfires and poor performance. Your Silverado's engine management system is calibrated for a specific heat range, so using the OEM-specified plug or an equivalent aftermarket option is vital.

Electrode Metal

Spark plugs are available with different electrode materials, each offering distinct advantages:

• Iridium: This is the most common material for modern engines like those in your Silverado. Iridium is extremely durable and has a very high melting point, allowing for very fine electrodes that produce a strong, focused spark. Iridium plugs offer extended service intervals, typically 97,500 to 100,000 miles.
• Platinum: Platinum plugs are also durable, offering longer life than copper plugs, often around 60,000 miles. They use a platinum disc welded to the center electrode and sometimes the ground electrode.
• Copper: While copper is an excellent conductor of electricity, it is softer and has a lower melting point, requiring thicker electrodes. Copper plugs are typically found in older vehicles or high-performance applications where frequent replacement is part of the maintenance schedule. Their lifespan is generally around 30,000 miles.

The 2.7L L3B Turbo engine uses a specialized NGK plug designed for its unique combustion characteristics, while the 5.3L L84 and 6.2L L87 V8 engines utilize long-life iridium plugs from ACDelco (NGK and Denso equivalents are also popular).

How to gap a spark plug

Setting the correct gap is essential for a consistent and strong spark. While many modern iridium and platinum plugs come pre-gapped from the factory, it's always a good idea to double-check, especially if you encounter any shipping damage. For your 2022 Silverado 1500, the gap specifications vary by engine (refer to the quick reference table above).

To gap a spark plug, you'll need a spark plug gapping tool, typically a wire-style or coin-style gauge. Gently slide the appropriate wire gauge between the center and ground electrodes. If the gap is too small, use the gapping tool's lever to carefully bend the ground electrode outwards. If the gap is too large, gently tap the ground electrode on a hard, non-abrasive surface to close the gap. Avoid bending the delicate center electrode, especially on iridium plugs, as this can easily damage the plug.

Replacement procedure tips

Replacing spark plugs on your 2022 Silverado 1500 is a manageable DIY task, but careful attention to detail will ensure a smooth process.

Coil-on-plug removal

All engines in the 2022 Silverado 1500 utilize a coil-on-plug (COP) ignition system. Each spark plug has its own ignition coil mounted directly above it. To access the spark plugs:

1. Disconnect the battery: Always disconnect the negative battery terminal before working on any electrical components.
2. Remove any obstructing components: This might include engine covers, air intake tubing, or wires.
3. Disconnect the electrical connector: Gently press the tab on the coil's electrical connector and pull it straight off. Avoid pulling on the wires.
4. Remove the coil mounting bolt: Each coil is typically secured by one bolt. Remove this bolt.
5. Remove the coil: Twist and pull the coil straight up to remove it from the spark plug well. Sometimes a little wiggling is needed.

Anti-seize debate

There's ongoing debate about whether to use anti-seize compound on spark plug threads. For spark plugs with nickel-plated shells, like many modern plugs, anti-seize is generally not recommended. The nickel plating provides adequate anti-seize properties, and adding more can lead to over-torquing and potential damage to the cylinder head threads or the spark plug itself. Always follow the spark plug manufacturer's recommendations. If you do use anti-seize, use a very small amount and reduce the torque specification by approximately 10-20%.

Dielectric grease on boots

It's highly recommended to apply a small amount of dielectric grease to the inside of the spark plug boots or the internal rubber seal of the coil-on-plug assemblies. This helps to prevent moisture and corrosion, making future removal easier and improving electrical insulation, preventing misfires.

Known issues

Fortunately, the 2022 Chevrolet Silverado 1500 engines do not have widespread, notorious spark plug-related issues like the Ford 3-valve engine's breaking plugs. However, common issues that can affect any modern engine include:

• Fouling: Excessive carbon buildup on the electrodes can lead to misfires. This can be caused by rich fuel mixtures, excessive oil consumption, or extended idling.
• Oil leaks into spark plug wells: Leaky valve cover gaskets or spark plug tube seals can allow oil to accumulate in the spark plug wells, leading to misfires and damage to the ignition coils.
• Damaged coils or connectors: Physical damage to the ignition coils or their electrical connectors can cause intermittent or persistent misfires.

Regular maintenance and using the correct spark plugs will help prevent most of these issues.

Need plugs replaced? Find a shop on Repairius.