How to Ensure Safe and Effective Spark Plug Replacement on GMC Canyon?

The first step in replacing spark plugs requires ignition coils removal. When using compressed air while working always wear safety glasses to protect your eyes from flying dirt particles. A thorough cleaning of the plug recess will help stop dirt from entering the Cylinder Head preventing both engine damage and thread contamination while assisting with new plug seating. A thread chaser will remove any thread contamination. Let the engine cool while using low-pressure air to clean Spark Plug recesses so the plug threads don't seize or damage the Cylinder Head threads. You should examine the spark plugs following their removal. Use spark plugs designed for your vehicle because differing designs might create serious engine harm. A round feeler gauge should be used to check the gap on new along with reconditioned spark plugs before installment because they often get altered during their handling period. The use of incorrect gap settings may result in engine deterioration and failure. Use a round feeler gauge to measure the Spark Plug gap then adjust it according to specifications. Check that the Spark Plug threads reward resistance when inserted into the Cylinder Head while maintaining full seat depth by utilizing thread chasers to clean dirt from threads. Secure the spark plugs within the Cylinder Head using a torque of 18 nm (13 lb ft) before completion. Finally, install the ignition coils.

How to ensure optimal performance by verifying the correct spark plug installation and inspecting its components on GMC Envoy?

Checks must confirm a right Spark Plug has been installed since driveability problems can emerge from incorrect plug choices according to ignition system specifications. The selected Spark Plug must have appropriate heat range properties because lower heat can cause fouling while higher heat can result in pre-ignition and engine damage. You should check the terminal post for damage while ensuring its shape is intact and conduct stability tests by twisting and pulling it; the post should not move. Check the insulator for electrical charge movement to ground between terminal post and ground as well as inspect the Spark Plug boot for damage and the recess area of the Cylinder Head for moisture since saturated boots create arcing conditions. Pay attention to any insulator cracks which might enable improper arcing of electrical charges while verifying that the center electrode gap with the side electrode is not excessively broad since this hampers Spark Plug operation. Tightening the Spark Plug based on specifications matters because improper torque can generate operational problems but extreme torque can break the insulator. The insulator tip needs inspection for signs of tracking while the side electrode should be checked for wear or breakage simultaneously with evaluation of the center electrode's tightness or damage which produces a rattling noise. Check for electrode bridges that may result from deposits while examining platinum pads on electrodes when present together with excessive fouling conditions. The last step should involve checking the Cylinder Head Spark Plug recess area for debris since damaged or dirty threads may cause installation difficulties. Cylinder operation under normal conditions produces a brown to grayish-tan appearance with little white powder residue but carbon fouling shows itself as dry fleecy black carbon forming from excessive fuel mixture scenarios and fuel injector leakage or above-average fuel pressure or air filter obstruction or improper combustion. The combined effect of weak coils alongside worn ignition wires together with wrong Spark Plug gaps can cause fouling mainly during long periods of idling and slow speed conditions. The spark intensity suffers when deposit fouling forms because of oil, coolant or additives while producing a glaze over the electrode.

How to replace a spark plug on GMC Sierra 1500?

The first step to replace a Spark Plug consists of removing the suitable Spark Plug wire boots which requires rotating each boot 1/2 turn while only grasping the boot itself or using the appropriate tool. The Spark Plug requires 1 to 2 turns of loosening before clearing away surrounding dirt by brushing or air blast. Put each plug into its own marked tray during the removal process according to cylinder number. The check and modification process of the Spark Plug gap must follow engine mechanical specifications. Follow this procedure for installing your Spark Plug to the Cylinder Head using hand pressure until it reaches a torque of 15 nm (11 lb ft). The inside of each Spark Plug wire boot needs dielectric grease gm p/n 12345579 (Canadian P/N 10953481) applied before putting back the appropriate plugs.

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30 Spark Plugs found

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GMC Glow Plug
Part Number: 97226202
$19.63 MSRP: $35.06
You Save: $15.43 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Glow Plug, Spark Ignition
Fits the following GMC Models:
- Sierra 1500 | 2001-2003 | Base, C3, Denali, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
- Sierra 1500 HD | 2001-2003 | SLE, SLT | 8 Cyl 6.0 L GAS
- Sierra 2500 | 2001-2003 | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
- Sierra 2500 HD | 2001-2003 | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 8.1 L GAS
- Sierra 3500 | 2001-2003 | Base, SL, SLE, SLT | 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 8.1 L GAS
- Yukon | 2001-2003 | Denali, SLE, SLT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
- Yukon XL 1500 | 2001-2003 | Denali, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
- Yukon XL 2500 | 2001-2003 | SLE, SLT | 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
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GMC Glow Plug
Part Number: 97326305
$24.56 MSRP: $43.86
You Save: $19.30 (44%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Glow Plug, Spark Ignition; Diesel Glow Plug
Fits the following GMC Models:
- Sierra 1500 | 2004-2005 | Base, Denali, Hybrid, SLE, SLT, WT | 6 Cyl 4.3 L GAS, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
- Sierra 1500 HD | 2005 | SLE, SLT | 8 Cyl 6.0 L GAS
- Sierra 2500 | 2004 | Base, SLE, SLT, WT | 8 Cyl 6.0 L GAS
- Sierra 2500 HD | 2004-2005 | Base, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 8.1 L GAS
- Sierra 3500 | 2004-2005 | Base, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 8.1 L GAS
- Yukon | 2004-2005 | Denali, SLE, SLT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
- Yukon XL 1500 | 2004-2005 | Denali, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
- Yukon XL 2500 | 2004-2005 | SLE, SLT | 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
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GMC Spark Plug
Part Number: 19302741
$2.34 MSRP: $4.18
You Save: $1.84 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaced by: 19354425
Fits the following GMC Models:
- Safari | 1990-1995 | Base, GT, SL, SLE, SLT, SLX | 4 Cyl 2.5 L GAS, 6 Cyl 4.3 L GAS
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GMC Spark Plug
Part Number: 19300872
$7.57 MSRP: $13.52
You Save: $5.95 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaces: 12597464, 92220447
Fits the following GMC Models:
- Acadia | 2009 | SLE, SLT | 6 Cyl 3.6 L GAS
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GMC Spark Plug
Part Number: 12681657
$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: 12611882
Fits the following GMC Models:
- Acadia | 2007-2008 | SLE, SLT | 6 Cyl 3.6 L GAS
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GMC Spark Plug
Part Number: 19417055
$9.53 MSRP: $17.02
You Save: $7.49 (45%)
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
Fits the following GMC Models:
- Savana 1500 | 2008-2010 | Base, LS, LT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
- Savana 2500 | 2008-2010 | Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
- Savana 3500 | 2008-2010 | Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
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GMC Spark Plug
Part Number: 19299585
$7.71 MSRP: $13.76
You Save: $6.05 (44%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Spark Plug, Spark Ignition
Fits the following GMC Models:
- Savana 1500 | 2003-2007 | Base, LS, LT, SLE | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
- Savana 2500 | 2003-2007 | Base, LS, LT, SLE | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
- Savana 3500 | 2003-2007 | Base, LS, LT, SLE | 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
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GMC Spark Plug
Part Number: 12680072
$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, Spark Ignition; Spark Plug,Glow
Fits the following GMC Models:
- Savana 1500 | 2011-2014 | Base, LS, LT | 8 Cyl 5.3 L FLEX
- Savana 2500 | 2011-2020 | Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
- Savana 3500 | 2011-2020 | Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
- Sierra 2500 HD | 2015-2019 | Base, Denali, SLE, SLT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
- Sierra 3500 HD | 2015-2019 | Base, Denali, SLE, SLT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
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GMC Spark Plug
Part Number: 12622441
$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; Spark Plug, Spark Ignition; Spark Plug,Glow
Fits the following GMC Models:
- Savana 2500 | 2018-2024 | Base, LS, LT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS, 8 Cyl 6.6 L GAS
- Savana 3500 | 2018-2024 | Base, LS, LT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS, 8 Cyl 6.6 L GAS
- Sierra 1500 | 2014-2023 | AT4, AT4X, Base, Denali, Denali Ultimate, Elevation, Pro, SLE, SLT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 5.3 L MILD HYBRID EV-GAS (MHEV), 8 Cyl 6.2 L GAS
- Sierra 2500 HD | 2020-2024 | AT4, AT4X, Base, Denali, Pro, SLE, SLT | 8 Cyl 6.6 L FLEX, 8 Cyl 6.6 L GAS
- Sierra 3500 HD | 2020-2024 | AT4, Base, Denali, Pro, SLE, SLT | 8 Cyl 6.6 L FLEX, 8 Cyl 6.6 L GAS
- Yukon | 2015-2023 | AT4, Denali, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
- Yukon XL | 2015-2023 | AT4, Denali, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
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GMC 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
Fits the following GMC Models:
- Terrain | 2018-2019 | SLE, SLT | 4 Cyl 1.6 L DIESEL
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GMC Glow Plug
Part Number: 55506604
$24.20 MSRP: $43.23
You Save: $19.03 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Glow Plug Assembly-Diesel Engine Combustion Air Heatr; Control Module; Glow Plug, Spark Ignition
Fits the following GMC Models:
- Sierra 1500 | 2020-2023 | AT4, AT4X, Denali, Denali Ultimate, Elevation, SLE, SLT | 6 Cyl 3.0 L DIESEL
- Yukon | 2021-2023 | Denali, SLE, SLT | 6 Cyl 3.0 L DIESEL
- Yukon XL | 2021-2023 | AT4, Denali, SLE, SLT | 6 Cyl 3.0 L DIESEL, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L GAS
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GMC Spark Plug
Part Number: 19354416
$2.44 MSRP: $4.36
You Save: $1.92 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaces: 05613906, 05614158, 19157992, 19300384, 5614158, 5613906
Fits the following GMC Models:
- Savana 1500 | 2003-2006 | Base, LS, LT, SLE | 6 Cyl 4.3 L GAS
- Savana 2500 | 2003-2006 | Base, SLE | 6 Cyl 4.3 L GAS
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GMC Glow Plug
Part Number: 12693207
$26.50 MSRP: $47.32
You Save: $20.82 (44%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Glow Plug Assembly-Diesel Engine Combustion Air Heatr; Glow Plug, Spark Ignition
Fits the following GMC Models:
- Sierra 2500 HD | 2024 | AT4, AT4X, Denali, Denali Ultimate, Pro, SLE, SLT | 8 Cyl 6.6 L DIESEL
- Sierra 3500 HD | 2024 | AT4, Denali, Denali Ultimate, Pro, SLE, SLT | 8 Cyl 6.6 L DIESEL
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GMC Glow Plug
Part Number: 12563554
$18.86 MSRP: $33.68
You Save: $14.82 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Glow Plug, Spark Ignition; Diesel Glow Plug
- Replaces: 25168651
Fits the following GMC Models:
- C1500 | 1988-1999 | Sierra, Sierra GT, Sierra SL, Sierra SLE, Sierra SLT, Sierra SLX, Sierra Special | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL
- C1500 Suburban | 1992-1999 | Base, SLE, SLT | 8 Cyl 5.7 L GAS, 8 Cyl 6.5 L DIESEL
- C2500 | 1988-2000 | Sierra, Sierra SL, Sierra SLE, Sierra SLT, Sierra SLX | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
- C2500 Suburban | 1992-1999 | Base, SLE, SLT | 8 Cyl 5.7 L GAS, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
- C3500 | 1988-2000 | Sierra, Sierra SL, Sierra SLE, Sierra SLT, Sierra SLX | 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
- G2500 | 1992-1995 | Rally, Rally STX, Vandura | 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL
- G3500 | 1992-1996 | Magnavan, Rally, Rally Camper Special, Rally STX, Vandura, Vandura Special | 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL
- K1500 | 1988-1999 | Sierra, Sierra SL, Sierra SLE, Sierra SLS, Sierra SLT, Sierra SLX, Sierra Special, Sierra Sport | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL
- K1500 Suburban | 1992-1999 | Base, SLE, SLT | 8 Cyl 5.7 L GAS, 8 Cyl 6.5 L DIESEL
- K2500 | 1988-2000 | Sierra, Sierra SL, Sierra SLE, Sierra SLT, Sierra SLX | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
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GMC Glow Plug
Part Number: 55589332
$54.87 MSRP: $97.98
You Save: $43.11 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Glow Plug, Glow; Glow Plug, Spark Ignition; Glow Plug,Glow
Fits the following GMC Models:
- Canyon | 2016-2022 | All Terrain, AT4, Denali, Elevation, SLE, SLT | 4 Cyl 2.8 L DIESEL
- Savana 2500 | 2017-2022 | Base, LS, LT | 4 Cyl 2.8 L DIESEL
- Savana 3500 | 2017-2022 | Base, LS, LT | 4 Cyl 2.8 L DIESEL
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GMC Spark Plug
Part Number: 55504354
$11.44 MSRP: $20.42
You Save: $8.98 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug,Glow
Fits the following GMC Models:
- Acadia | 2020-2023 | Denali, SLE, SLT | 4 Cyl 2.0 L GAS
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GMC Spark Plug
Part Number: 12688094
$10.33 MSRP: $18.44
You Save: $8.11 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug, Spark Ignition; Spark Plug,Glow
Fits the following GMC Models:
- Canyon | 2023 | AT4, AT4X, Denali, Elevation | 4 Cyl 2.7 L GAS
- Sierra 1500 | 2019-2022 | Base, Elevation, Pro, SLE | 4 Cyl 2.7 L GAS
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GMC Spark Plug
Part Number: 25334145
Fits the following GMC Models:
- Envoy | 2002-2003 | SLE, SLT | 6 Cyl 4.2 L GAS
- Envoy XL | 2002-2003 | SLE, SLT | 6 Cyl 4.2 L GAS
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GMC Spark Plug
Part Number: 12621258
Product Specifications
- Replaces: 12571164, 12563707, 12609877
Fits the following GMC Models:
- Canyon | 2009-2012 | SLE, SLT | 8 Cyl 5.3 L GAS
- Sierra 1500 | 2009-2013 | Denali, Hybrid, SL, SLE, SLT, WT, XFE | 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX
- Sierra 2500 HD | 2009-2014 | Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
- Sierra 3500 HD | 2009-2014 | Denali, SLE, SLT, WT | 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
- Yukon | 2007-2014 | Denali, Denali Hybrid, Hybrid, SLE, SLT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
- Yukon XL 1500 | 2010-2014 | Denali, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 6.2 L FLEX
- Yukon XL 2500 | 2010-2013 | SLE, SLT | 8 Cyl 6.0 L FLEX
View More
View related parts
GMC Glow Plug
Part Number: 12725202
$25.88 MSRP: $46.22
You Save: $20.34 (45%)
Product Specifications
- Other Name: Glow Plug Assembly-Diesel Engine Combustion Air Heatr; Control Module; Glow Plug, Spark Ignition
- Replaces: 12690238, 12679959
Fits the following GMC Models:
- Sierra 2500 HD | 2017-2023 | AT4, Base, Denali, Pro, SLE, SLT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L FLEX, 8 Cyl 6.6 L GAS
- Sierra 3500 HD | 2017-2023 | AT4, Base, Denali, Pro, SLE, SLT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L FLEX, 8 Cyl 6.6 L GAS
- Yukon XL | 2021-2023 | Denali, SLE, SLT | 6 Cyl 3.0 L DIESEL
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GMC Spark Plug Parts Questions & Experts Answers

Spark Plug
12681663
Q: How to Ensure Safe and Effective Spark Plug Replacement on GMC Canyon?
A: The first step in replacing spark plugs requires ignition coils removal. When using compressed air while working always wear safety glasses to protect your eyes from flying dirt particles. A thorough cleaning of the plug recess will help stop dirt from entering the Cylinder Head preventing both engine damage and thread contamination while assisting with new plug seating. A thread chaser will remove any thread contamination. Let the engine cool while using low-pressure air to clean Spark Plug recesses so the plug threads don't seize or damage the Cylinder Head threads. You should examine the spark plugs following their removal. Use spark plugs designed for your vehicle because differing designs might create serious engine harm. A round feeler gauge should be used to check the gap on new along with reconditioned spark plugs before installment because they often get altered during their handling period. The use of incorrect gap settings may result in engine deterioration and failure. Use a round feeler gauge to measure the Spark Plug gap then adjust it according to specifications. Check that the Spark Plug threads reward resistance when inserted into the Cylinder Head while maintaining full seat depth by utilizing thread chasers to clean dirt from threads. Secure the spark plugs within the Cylinder Head using a torque of 18 nm (13 lb ft) before completion. Finally, install the ignition coils.
Spark Plug
25334145
Q: How to ensure optimal performance by verifying the correct spark plug installation and inspecting its components on GMC Envoy?
A: Checks must confirm a right Spark Plug has been installed since driveability problems can emerge from incorrect plug choices according to ignition system specifications. The selected Spark Plug must have appropriate heat range properties because lower heat can cause fouling while higher heat can result in pre-ignition and engine damage. You should check the terminal post for damage while ensuring its shape is intact and conduct stability tests by twisting and pulling it; the post should not move. Check the insulator for electrical charge movement to ground between terminal post and ground as well as inspect the Spark Plug boot for damage and the recess area of the Cylinder Head for moisture since saturated boots create arcing conditions. Pay attention to any insulator cracks which might enable improper arcing of electrical charges while verifying that the center electrode gap with the side electrode is not excessively broad since this hampers Spark Plug operation. Tightening the Spark Plug based on specifications matters because improper torque can generate operational problems but extreme torque can break the insulator. The insulator tip needs inspection for signs of tracking while the side electrode should be checked for wear or breakage simultaneously with evaluation of the center electrode's tightness or damage which produces a rattling noise. Check for electrode bridges that may result from deposits while examining platinum pads on electrodes when present together with excessive fouling conditions. The last step should involve checking the Cylinder Head Spark Plug recess area for debris since damaged or dirty threads may cause installation difficulties. Cylinder operation under normal conditions produces a brown to grayish-tan appearance with little white powder residue but carbon fouling shows itself as dry fleecy black carbon forming from excessive fuel mixture scenarios and fuel injector leakage or above-average fuel pressure or air filter obstruction or improper combustion. The combined effect of weak coils alongside worn ignition wires together with wrong Spark Plug gaps can cause fouling mainly during long periods of idling and slow speed conditions. The spark intensity suffers when deposit fouling forms because of oil, coolant or additives while producing a glaze over the electrode.
Spark Plug
12681664
Q: How to replace a spark plug on GMC Sierra 1500?
A: The first step to replace a Spark Plug consists of removing the suitable Spark Plug wire boots which requires rotating each boot 1/2 turn while only grasping the boot itself or using the appropriate tool. The Spark Plug requires 1 to 2 turns of loosening before clearing away surrounding dirt by brushing or air blast. Put each plug into its own marked tray during the removal process according to cylinder number. The check and modification process of the Spark Plug gap must follow engine mechanical specifications. Follow this procedure for installing your Spark Plug to the Cylinder Head using hand pressure until it reaches a torque of 15 nm (11 lb ft). The inside of each Spark Plug wire boot needs dielectric grease gm p/n 12345579 (Canadian P/N 10953481) applied before putting back the appropriate plugs.