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Common Car Repairs Spark Plugs Replacement

GMC Envoy Spark Plug Replacement

Spark plug replacement is often performed as part of your routine maintenance, and the price can vary drastically depending on the year, make, and model of your vehicle.

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Range for All Cars

$115 $475

This range covers an average spark plug replacement. Tell us your car to get a guaranteed price from RepairSmith.

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GMC Envoy Spark Plugs Replacement

RepairSmith offers upfront and competitive pricing. The average cost for GMC Envoy Spark Plugs Replacement is $356. Drop it off at our shop and pick it up a few hours later, or save time and have our Delivery mechanics come to you.

Quoted to
2004 GMC Envoy 4.2L L6 SLT
137,000 miles
Rashone O  • 
September 8, 2020 10:25 PM  • 
Las Vegas NV 89166
5.50  hrs
2.30  hrs
2004 GMC Envoy 4.2L L6
99,000 miles
Russel A  • 
August 28, 2020 9:06 PM  • 
Long Beach CA 90815
5.30  hrs
2.40  hrs
2005 GMC Envoy 4.2L L6
124,000 miles
Bryce W  • 
August 17, 2020 10:59 PM  • 
Mesa AZ 85203
3.10  hrs
1.50  hrs
2002 GMC Envoy 4.2L L6
191,000 miles
Royce H  • 
August 17, 2020 10:04 AM  • 
Redwood City CA 94063
4.60  hrs
2.10  hrs
2002 GMC Envoy 4.2L L6
195,000 miles
Ralph D  • 
August 6, 2020 11:24 PM  • 
Mesa AZ 85202
6.20  hrs
2.30  hrs
2005 GMC Envoy 4.2L L6
16,500 miles
Luis F  • 
July 2, 2020 1:47 AM  • 
Fontana CA 92335
4.10  hrs
2.00  hrs
2002 GMC Envoy 4.2L L6
170,000 miles
Natalie R  • 
June 26, 2020 7:58 PM  • 
Los Angeles CA 90063
4.70  hrs
2.50  hrs
2004 GMC Envoy 4.2L L6
197,785 miles
Daniel F  • 
May 26, 2020 12:00 PM  • 
Upland CA 91786
5.20  hrs
2.00  hrs
2005 GMC Envoy 4.2L L6
160,000 miles
Tj C  • 
November 23, 2019 11:00 AM  • 
Lancaster CA 93535
6.20  hrs
2.10  hrs
2007 GMC Envoy Denali
125,000 miles
Craig W  • 
September 16, 2019 3:39 AM  • 
Big Bear City CA 92314
4.90  hrs
2.70  hrs
2006 GMC Envoy Denali
192,000 miles
Eric A  • 
August 15, 2019 8:05 PM  • 
Palm Desert CA 92211
2.70  hrs
2.50  hrs
2007 GMC Envoy Denali
110,000 miles
Craig W  • 
August 15, 2019 3:54 AM  • 
Big Bear City CA 92314
3.00  hrs
2.80  hrs
2007 GMC Envoy 5.3L V8 Denali
187,284 miles
Willie S  • 
Los Angeles CA 90018
7.30  hrs
2.90  hrs
Last Updated:
Oct 2, 2020 4:53 PM
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What are Spark Plugs?

Spark plugs are an important part of your vehicle’s ignition system. Think of them as tiny bolts of lightning that help power your engine. Each cylinder in your vehicle's engine has a spark plug. Electricity from the vehicle's battery runs to the spark plugs, where it is used to ignite the air and fuel mixture in the engine. The power of the explosion forces the piston into the cylinder, which turns the crankshaft, which turns the wheels, which ultimately puts your vehicle in motion. Pretty nifty, right?
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Symptoms of failing Spark Plugs

Poor engine performance

If your spark plugs are worn, your vehicle will lose some of its power. The engine will misfire and hesitate, and your car will have much slower acceleration and a rougher ride. These are all signs that your vehicle might need a spark plug replacement or repair.

Check engine light

Remember that time your check engine light came on, and then you drove a few thousand miles anyway, pretending it wasn’t actually on? How did that work out for you? Busted spark plugs will impact engine performance and emissions, which should illuminate your check engine light. Try paying attention to it this time, it might save you some money in repair or replacement costs. A check engine light is another great sign that you might need a spark plug replacement.

Regularly scheduled maintenance

We know. You don’t use maps and you don’t like chore charts and you don’t need to consult your regularly scheduled maintenance. Good for you. But actually, you do. Spark plugs are considered a part of maintenance, and you should replace these plugs before they die on the job.

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How urgent is replacing Spark Plugs?

If a spark plug or two are dead, the car won’t be running on all cylinders, and you’d be a pretty bad friend if you let your car go to work while sick. Do you want dead sparks on your conscience?

The longer you drive with busted plugs, the more damage you risk incurring to your vehicle. Misfiring sparks can hurt the catalytic converter, and, in rare cases, a portion of the spark plug can fall off into the engine, causing some bigger issues and far more to replace than just a couple old plugs.

The simple thing is the right thing. Get a spark plug replacement on time and minimize the risk of having to replace your entire engine.

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How can we help?

Car repair can be scary, but it doesn't need to be. RepairSmith is here to make it easy.

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