How many spark plugs does a 2002 GMC Envoy have?

How many spark plugs does a 2002 GMC Envoy have?

Most cars have one plug per cylinder, so a four-cylinder engine will have four plugs, a six-cylinder engine will have six plugs, and so forth….

Car	2002 GMC EnvoyL6-4.2L
Service	Service typeSpark Plug Replacement
Estimate	Estimate$468.68
Shop/Dealer Price	Shop/Dealer Price$558.39 – $782.45

Should you replace ignition coils when you replace spark plugs?

But if you are simply replacing your spark plugs as part of routine maintenance service, it is not necessary to replace your ignition coils at the same time unless there are signs that they are failing.

Why to replace spark plugs?

Spark plugs need replacing when a car has trouble starting or accelerating or when the engine misfires, surges or produces a rough sound.

How often shall I replace spark plugs?

Some manufacturers recommend replacing spark plugs as soon as 60,000 miles, while others say 100,000 miles or later. Spark plugs use precious metals, such as platinum and iridium , that extend their useful lives, and computer controls on today’s cars help keep the plugs in like-new condition for years.

Is it hard to replace spark plugs?

Fouled, damaged, or worn out spark plugs can lead to a variety of engine problems, such as misfires, hard starts, increased emissions, and poor fuel economy. For most vehicles, you should replace your spark plugs every 30,000 miles (consult your owner’s manual for your specific interval).

How do I replace my spark plugs?

Use a wire brush or compressed air to clean up around the wire connections and make sure you’ve got a good, clean port. Replace the wires if necessary. Insert the new plugs and tighten with your ratchet. Using the spark-plug socket, remove each plug from the engine, and replace each with a new spark plug.