Spark Plug Replacement at your home or office.

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Spark Plug Replacement Estimate for GMC Envoy

GMC Envoy Spark Plug Replacement costs $163 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$148 to $209
Labor: $140 -$200
Parts: $8 -$9
Average Dealer price
$203 to 250
Average Shop price
$177 to 219
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
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CarServiceYourMechanic PriceShop/Dealer Price
2008 GMC EnvoyL6-4.2LService typeSpark Plug ReplacementYourMechanic Price$149.53Shop/Dealer Price$180.96 - $209.89
2002 GMC EnvoyL6-4.2LService typeSpark Plug ReplacementYourMechanic Price$149.36Shop/Dealer Price$180.88 - $209.78
2007 GMC EnvoyV8-5.3LService typeSpark Plug ReplacementYourMechanic Price$183.73Shop/Dealer Price$222.28 - $256.09
2009 GMC EnvoyV8-5.3LService typeSpark Plug ReplacementYourMechanic Price$183.73Shop/Dealer Price$222.33 - $256.19
2005 GMC EnvoyL6-4.2LService typeSpark Plug ReplacementYourMechanic Price$149.53Shop/Dealer Price$180.98 - $209.93
2006 GMC EnvoyV8-5.3LService typeSpark Plug ReplacementYourMechanic Price$184.30Shop/Dealer Price$222.91 - $257.10
2005 GMC EnvoyV8-5.3LService typeSpark Plug ReplacementYourMechanic Price$183.94Shop/Dealer Price$222.69 - $256.78
2006 GMC EnvoyL6-4.2LService typeSpark Plug ReplacementYourMechanic Price$149.36Shop/Dealer Price$180.87 - $209.77
Show example GMC Envoy Spark Plug Replacement prices

Spark Plug Replacement Service & Cost

What are the Spark Plugs all about?

The spark plugs are an important part of the ignition system. When you turn the ignition key (car's key) on, it causes the ignition coil to generate the spark which ignites the air-fuel mixture in the engine cylinders to start the engine. The number of spark plugs in the car is the same as the number of cylinders, although some vehicle manufacturers will use two spark plugs per cylinder.

Over time, the spark plugs wear out and require replacement. When the spark plugs wear out, it is harder for it the air-fuel mixture to ignite, resulting in engine misfires. If one of the spark plugs has failed, the car will still start and run, but it will run poorly. On some vehicles, spark plug replacement may be labor intensive and involve removal of the intake plenum.

Spark plugs-MATROX-1

Keep in mind:

  • When the spark plugs are replaced, it is a good idea to inspect the ignition cables as well.
  • Spark plugs come in numerous ratings, and the correct rating for your vehicle should always be used.

How it's done:

  • Scan the car for codes.
  • Clean all surface areas around the spark plugs.
  • Remove spark plugs.
  • Inspect threads in engine head (where plugs are installed).
  • Perform compression test if needed.
  • Inspect ignition wires.
  • Apply anti-seize to the threads of the spark plugs.
  • Install new spark plugs.
  • If needed replace any gaskets removed.

Our recommendation:

During routine maintenance and checkups, your ignition system should always be inspected. Any time that a component of the ignition system is replaced, it’s a good idea to consider replacing the spark plugs as well. If you don’t preemptively change your spark plugs your engine will let you know by misfiring or running poorly, so schedule an inspection as soon as you notice that your engine is not performing properly.

What common symptoms indicate you may need to replace the Spark Plugs?

  • Check Engine light is on.
  • Engine misfires.
  • Poor fuel economy.
  • Vibration coming from the engine.

How important is this service?

Spark plugs are responsible for igniting the fuel that your engine uses to run. When you turn your key, a small voltage of power is sent to the ignition coil, where it is transformed into high voltage currency. This high voltage currency is sent through the ignition cables to the spark plugs. The spark plugs use the power to create a spark, which ignites the fuel, and allows the engine to function.

When the spark plugs malfunction, this spark won’t be created, and the fuel will not be ignited as it should. Your vehicle has many spark plugs, so depending on how many fail, your engine may either run poorly, or not run at all. Continuing to drive a vehicle with malfunctioning spark plugs can also cause damage to the catalytic converter.

Fast and easy Spark Plug Replacement service at your home or office.

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Meet some of our expert GMC mechanics

Real customer reviews from GMC owners like you.

471 reviews
Peter
38 years of experience
Excellent
1999 GMC K2500 SUBURBAN - SPARK PLUG REPLACEMENT
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129 reviews
David
23 years of experience
David showed up early, was there with a smile and ready to work quickly and explain everything to me. The price was fair, service was excellent and it's nice to work with someone honest and friendly.
2007 GMC ENVOY - CAR THERMOSTAT REPLACEMENT
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70 reviews
Michael
17 years of experience
Great service trusted guy rare find ! Thanks !
2004 GMC ENVOY - INTAKE MANIFOLD GASKETS REPLACEMENT
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48 reviews
TJ
21 years of experience
TJ arrived at our house exactly on time and replaced an axle/CV shaft assembly on my GMC Envoy. His work is excellent, and he is very knowledgeable, detail-oriented, and easy to talk with. He answered all our questions perfectly, and made sure we understood his answers. We had no worries at all about his work. Due to physical limitations, it is difficult for us to go to a garage - We are very thankful that he is able to come to our house and work on our vehicles. It's like having a good friend who is an excellent mechanic, too! We always look for TJ when we need to have automotive work done, and we highly recommend him to all! Thank you TJ! :)
2002 GMC ENVOY - AXLE / CV SHAFT ASSEMBLY REPLACEMENT (DRIVER SIDE FRONT)
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Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
CarServiceYourMechanic PriceShop/Dealer Price
2008 GMC EnvoyL6-4.2LService typeSpark Plug ReplacementYourMechanic Price$149.53Shop/Dealer Price$180.96 - $209.89
2002 GMC EnvoyL6-4.2LService typeSpark Plug ReplacementYourMechanic Price$149.36Shop/Dealer Price$180.88 - $209.78
2007 GMC EnvoyV8-5.3LService typeSpark Plug ReplacementYourMechanic Price$183.73Shop/Dealer Price$222.28 - $256.09
2009 GMC EnvoyV8-5.3LService typeSpark Plug ReplacementYourMechanic Price$183.73Shop/Dealer Price$222.33 - $256.19
2005 GMC EnvoyL6-4.2LService typeSpark Plug ReplacementYourMechanic Price$149.53Shop/Dealer Price$180.98 - $209.93
2006 GMC EnvoyV8-5.3LService typeSpark Plug ReplacementYourMechanic Price$184.30Shop/Dealer Price$222.91 - $257.10
2005 GMC EnvoyV8-5.3LService typeSpark Plug ReplacementYourMechanic Price$183.94Shop/Dealer Price$222.69 - $256.78
2006 GMC EnvoyL6-4.2LService typeSpark Plug ReplacementYourMechanic Price$149.36Shop/Dealer Price$180.87 - $209.77
Show example GMC Envoy Spark Plug Replacement prices

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