How to replace spark plugs safely and correctly on GMC Terrain?

Begin the replacement of spark plugs only when the engine has cooled enough to protect aluminum cylinder heads. The first step involves taking out ignition coils while you perform cleaning operations on Spark Plug holes. A 5/8 inch Spark Plug socket helps to extract the spark plugs from their locations. The application of anti-seize compound on spark plugs should be avoided while installation to prevent harmful stress on Cylinder Head threads during tightness measurements. Adhere to 1.0 mm (0.040 in) as the prescribed Spark Plug gap setting while torquing plugs to 20 nm (15 lb ft). Finally, reinstall the Ignition Coil(s).

OEM GMC Terrain Spark Plug

Ignition Spark Plug

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GMC Terrain Spark Plug Part Number: 12683541
$9.41 MSRP: $16.80
You Save: $7.39 (44%)
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Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug,Glow
- Replaces: 55490097
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2023 GMC Terrain | AT4, Denali, SL, SLE, SLT | 4 Cyl 1.5 L GAS
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GMC Terrain Spark Plug Part Number: 12681660
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaces: 12622561
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2013-2017 GMC Terrain | Denali, SLE, SLT | 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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GMC Terrain Spark Plug Part Number: 12681658
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug,Glow
- Replaces: 12617309, 12590701, 12620540
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2017 GMC Terrain | Denali, SL, SLE, SLT | 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS, 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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GMC Terrain Spark Plug Part Number: 12681659
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug,Glow
- Replaces: 12647827, 12626906
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2020 GMC Terrain | Denali, SLE, SLT | 4 Cyl 2.0 L GAS
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GMC Terrain Glow Plug Part Number: 55596430
$28.47 MSRP: $50.84
You Save: $22.37 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Glow Plug, Glow; Diesel Glow Plug; Glow Plug,Glow
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2019 GMC Terrain | SLE, SLT | 4 Cyl 1.6 L DIESEL

GMC Terrain Spark Plug

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The Spark Plug of GMC Terrain vehicles' functions include sparking a fire that helps in the burning of the fuel/air mixture in the vehicle's engine. This component is made up of a central electrode, metal terminal, and ceramic insulator surrounded by a steel casing. The Spark Plugs available in the market usually include copper core, platinum, iridium, and double platinum Spark Plugs that are somewhat durable and performs well as per the applications and the ignition system. The ignition coil transforms the voltage supplied by the battery to high voltage to produce the spark which ignites the air-fuel mixture, Spark Plugs firing at least hundreds of times per minute while the engine is functioning. Correct servicing and replacement of Spark Plugs are crucial because they affect the efficient operation of an engine, and this may cause problems such as failure to ignite the fuel, stalling, and poor fuel economy.

GMC Terrain Spark Plug Parts Questions & Experts Answers

Spark Plug
12681658
Q: How to replace spark plugs safely and correctly on GMC Terrain?
A:
Begin the replacement of spark plugs only when the engine has cooled enough to protect aluminum cylinder heads. The first step involves taking out Ignition Coils while you perform cleaning operations on Spark Plug holes. A 5/8 inch Spark Plug socket helps to extract the spark plugs from their locations. The application of anti-seize compound on spark plugs should be avoided while installation to prevent harmful stress on Cylinder Head threads during tightness measurements. Adhere to 1.0 mm (0.040 in) as the prescribed Spark Plug gap setting while torquing plugs to 20 nm (15 lb ft). Finally, reinstall the Ignition Coil(s).