How to Service and Repair Spark Plug Wires on GMC Savana 3500?

In order to service and repair the Spark Plug Wires, you will need to remove the engine cover. Open the left side of the engine enclosure and remove the Spark Plug wire from each Spark Plug at the left side of the engine. Twists the boots 1/2 turn before pulling away and pulling only the boot or using the tool specifically designed for the purpose of removing the boot. Follow the same process for the right side engine's Spark Plug Wires. Then, remove the Spark Plug wire from the Distributor, twisting each boot 1/2 turn and tugging on the boot only or using a tool for the purpose. However, look for the Spark Plug Wires on the wire clips and pull them out, using a coil wire to pull the wire out of the Distributor and coil as well. For installation a little bit of dielectric silicone grease (GM P/N 12345579) should be applied on each boot of the Spark Plug Wires. Mount the coil wire onto the coil wire to the Distributor, and the Spark Plug wire onto the Distributor. Connect each of the Spark Plug Wires to each Spark Plug on the right side, each of the Spark Plug Wires to each Spark Plug on the left side than secure the Spark Plug Wires into the clips. Check wiring for proper installation by pushing the side of the boot to check seating, re-looping loose boots, and keeping wire routings to prevent the radio ignition noise, cross firing of the plugs, or shorting leads to ground. Finally, reinstall the engine cover.

How to replace the Spark Plug Wires on GMC Savana 2500?

Begin the Spark Plug wire replacement process by removing the engine cover. Remove the Spark Plug wire by first twisting every wire 1/2 turn then pulling only on the boot area to detach it from each Spark Plug. Start wire removal from the Ignition Coil by applying 1/2-boot twist action followed by boot extraction only. When working with the square design melco(R) Spark Plug wire use a piece that measures 145 mm (5.70 in) from the wire seal to wire seal point while the round design delphi(R) needs one that measures 110 mm (4.30 in) between wire seal points. The ignition coils come from two manufacturers: the ignition coils from melco(R) (square design) and delphi(R) (round design) require unique Spark Plug Wires and respective mounting brackets called melco(R) (square design) coil mounting bracket and delphi(R) (round design) coil mounting bracket. Begin Spark Plug wire installation by connecting wires to the Ignition Coil followed by connecting wires to each Spark Plug. Verify proper boot installation by lightly pressing each side of the wire boot and correct any loose fittings. Finally, reinstall the engine cover.

How to Replace Spark Plug Wires on GMC Sierra 1500?

Begin the Spark Plug wire replacement process by carefully noting their proper placement. Use either a tool or carefully twist the boot 1/2 turn before pulling it from the Spark Plug (1, 2). The next step entails removing Spark Plug wire boots from the Ignition Coil through the same procedure. Next cut open the Spark Plug wire separators so you can pull out the Spark Plug Wires. Reviewing boot to wire fit before installation is essential to maintain Spark Plug wire core integrity and prevent engine misfire or crossfire because improper seating leads to wire damage. For installed old Spark Plug Wires the application of dielectric grease gm pn 12345579 (Canadian PN 10953481) or equivalent inside Spark Plug wire boots must occur. Follow these installation steps: put Spark Plug Wires in place, make sure Spark Plug wire separators get closed, then secure Spark Plug wire boots to each Ignition Coil before attaching (1, 2) each boot to the Spark Plug. For proper Spark Plug wire examination check their route (1, 2, 3, 4, 5, 6) while also checking boot seating by pushing all boots sideways before reboots and fresh dielectric grease application in each boot during installation operations.

OEM GMC Spark Plug Wires

Spark Plug Ignition Wires

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58 Spark Plug Wires found

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GMC Cable Set
Part Number: 12192094
$38.29 MSRP: $71.91
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Product Specifications
- Other Name: Wire Kit, Spark Plug; Spark Plug Wire; Wire Kit, Spark Or Glow Plug Ignition
Fits the following GMC Models:
- Sonoma | 1998-2003 | SL, SLE, SLS | 4 Cyl 2.2 L FLEX, 4 Cyl 2.2 L GAS
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GMC Cable Set
Part Number: 19171847
$49.07 MSRP: $88.82
You Save: $39.75 (45%)
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Product Specifications
- Other Name: Wire Kit, Spark Plug; Spark Plug Wire; Wire Kit, Spark Or Glow Plug Ignition
- Replaces: 12096433
Fits the following GMC Models:
- G1500 | 1994-1995 | Rally, Rally STX, Vandura | 8 Cyl 5.0 L GAS
- G2500 | 1994-1995 | Rally, Rally STX, Vandura | 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS
- G3500 | 1994-1996 | Magnavan, Rally, Rally Camper Special, Rally STX, Vandura, Vandura Special | 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS
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GMC Plug Wire
Part Number: 12192133
$14.94 MSRP: $28.06
You Save: $13.12 (47%)
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Product Specifications
- Other Name: Wire, Spark Plug; Spark Plug Wire; Cable; Wire, Spark Plug Or Coil
Fits the following GMC Models:
- Sierra 1500 | 1999-2003 | Base, C3, Denali, HT, SL, SLE, SLT, WT | 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 | 1999-2003 | Base, SL, SLE, SLT, WT | 8 Cyl 5.3 L GAS, 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
- Sierra 3500 | 2001-2003 | Base, SL, SLE, SLT | 8 Cyl 6.0 L GAS
- Yukon | 2000-2006 | Denali, SL, 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 | 2000-2003 | Denali, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
- Yukon XL 2500 | 2000-2003 | SLE, SLT | 8 Cyl 6.0 L GAS
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GMC Cable Set
Part Number: 19171857
$114.51 MSRP: $247.86
You Save: $133.35 (54%)
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Product Specifications
- Other Name: Wire Kit, Spark Plug; Spark Plug Wire; Wire Kit, Spark Or Glow Plug Ignition
- Replaces: 12192004
Fits the following GMC Models:
- C2500 | 1996-2000 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 7.4 L GAS
- C2500 Suburban | 1996-1999 | Base, SLE, SLT | 8 Cyl 7.4 L GAS
- C3500 | 1996-2000 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 7.4 L GAS
- K2500 | 1996-2000 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 7.4 L GAS
- K2500 Suburban | 1996-1999 | Base, SLE, SLT | 8 Cyl 7.4 L GAS
- K3500 | 1996-2000 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 7.4 L GAS
- Savana 3500 | 1996-2000 | Base, SLE | 8 Cyl 7.4 L GAS
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GMC Cable Set
Part Number: 12173581
$19.83 MSRP: $37.24
You Save: $17.41 (47%)
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Product Specifications
- Other Name: Wire, Spark Plug Or Coil; Spark Plug Wire
Fits the following GMC Models:
- Savana 1500 | 2004-2007 | Base, LS, LT, SLE | 6 Cyl 4.3 L GAS
- Savana 2500 | 2004-2006 | Base, SLE | 6 Cyl 4.3 L GAS
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GMC Cable Set
Part Number: 19154582
$49.61 MSRP: $108.32
You Save: $58.71 (55%)
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Product Specifications
- Other Name: Wire Kit, Spark Plug; Spark Plug Wire; Wire Kit, Spark Or Glow Plug Ignition
- Replaces: 12074076
Fits the following GMC Models:
- C1500 | 1991-1995 | Sierra, Sierra SL, Sierra SLE, Sierra SLT, Sierra SLX, Sierra Special | 6 Cyl 4.3 L GAS
- C2500 | 1991-1995 | Sierra, Sierra SL, Sierra SLE, Sierra SLX | 6 Cyl 4.3 L GAS
- K1500 | 1991-1995 | Sierra, Sierra SL, Sierra SLE, Sierra SLS, Sierra SLT, Sierra SLX, Sierra Special, Sierra Sport | 6 Cyl 4.3 L GAS
- K2500 | 1991-1995 | Sierra, Sierra SL, Sierra SLE, Sierra SLX | 6 Cyl 4.3 L GAS
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GMC Cable Set
Part Number: 19154576
$49.07 MSRP: $88.83
You Save: $39.76 (45%)
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Product Specifications
- Other Name: Wire Kit, Spark Plug; Spark Plug Wire; Ignition Set; Wire Kit, Spark Or Glow Plug Ignition
- Replaces: 12073935
Fits the following GMC Models:
- C1500 | 1988-1990 | Sierra, Sierra SLE, Sierra SLX | 6 Cyl 4.3 L GAS
- C2500 | 1988-1990 | Sierra, Sierra SLE, Sierra SLX | 6 Cyl 4.3 L GAS
- G1500 | 1987-1991 | Rally, Rally STX, Vandura | 6 Cyl 4.3 L GAS
- G2500 | 1987-1991 | Rally, Rally STX, Vandura | 6 Cyl 4.3 L GAS
- G3500 | 1987-1991 | Vandura, Vandura Special | 6 Cyl 4.3 L GAS
- K1500 | 1988-1990 | Sierra, Sierra SLE, Sierra SLX | 6 Cyl 4.3 L GAS
- K2500 | 1988-1990 | Sierra, Sierra SLE, Sierra SLX | 6 Cyl 4.3 L GAS
- R2500 | 1987-1988 | Base, High Sierra, Sierra Classic | 6 Cyl 4.8 L GAS
- R3500 | 1987-1988 | Base, High Sierra, Sierra Classic | 6 Cyl 4.8 L GAS
- Safari | 1986-1990 | Base, SL, SLE, SLT, SLX | 4 Cyl 2.5 L GAS, 6 Cyl 4.3 L GAS
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GMC Cable Set
Part Number: 19417609
$108.43 MSRP: $236.70
You Save: $128.27 (55%)
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Product Specifications
- Other Name: Wire Kit, Spark Plug; Spark Plug Wire; Plug Wire Set; Wire Kit, Spark Or Glow Plug Ignition
- Replaces: 88984269, 19351577
Fits the following GMC Models:
- Sierra 2500 HD | 2003-2006 | Base, SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
- Sierra 2500 HD Classic | 2007 | SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
- Sierra 3500 | 2003-2006 | Base, SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
- Sierra 3500 Classic | 2007 | SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
- Yukon XL 2500 | 2003-2006 | SLE, SLT | 8 Cyl 8.1 L GAS
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GMC Cable Set
Part Number: 19172235
$54.82 MSRP: $119.70
You Save: $64.88 (55%)
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Product Specifications
- Other Name: Wire Kit, Spark Plug; Spark Plug Wire; Wire Kit, Spark Or Glow Plug Ignition
- Replaces: 12043729
Fits the following GMC Models:
- Caballero | 1984-1987 | Amarillo, Base, Diablo | 8 Cyl 5.0 L GAS
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GMC Cable Set
Part Number: 19417612
$107.87 MSRP: $233.48
You Save: $125.61 (54%)
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Product Specifications
- Other Name: Wire Kit, Spark Plug; Spark Plug Wire; Plug Wire Set; Wire Kit, Spark Or Glow Plug Ignition
- Replaces: 89018058, 19351593
Fits the following GMC Models:
- Envoy | 2006-2008 | Denali | 8 Cyl 5.3 L GAS
- Envoy XL | 2006 | Denali | 8 Cyl 5.3 L GAS
- Sierra 1500 | 2007-2008 | Denali, SL, SLE, SLT, WT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L GAS
- Sierra 2500 HD | 2007-2008 | SLE, SLT, WT | 8 Cyl 6.0 L GAS
- Sierra 3500 HD | 2007-2008 | SLE, SLT, WT | 8 Cyl 6.0 L GAS
- Yukon | 2007-2009 | Denali, 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-GAS (FHEV), 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
- Yukon XL 1500 | 2007-2009 | Denali, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
- Yukon XL 2500 | 2007-2009 | SLE, SLT | 8 Cyl 6.0 L GAS
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GMC Cable Set
Part Number: 19170847
$35.95 MSRP: $67.52
You Save: $31.57 (47%)
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Product Specifications
- Other Name: Wire Kit, Spark Plug; Spark Plug Wire; Wire Kit, Spark Or Glow Plug Ignition
- Replaces: 12096410
Fits the following GMC Models:
- Sonoma | 1994-1995 | SL, SLE, SLS | 4 Cyl 2.2 L GAS
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GMC Plug Wire
Part Number: 12716289
$17.53 MSRP: $32.93
You Save: $15.40 (47%)
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Product Specifications
- Other Name: Wire Assembly-Spark Plug; Spark Plug Wire; Cable Set; Engine; Cable; Wire, Spark Plug Or Coil
- Replaces: 12633447, 12670293
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 | 4 Cyl 2.7 L GAS, 6 Cyl 3.0 L DIESEL, 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 1500 Limited | 2019 | Base, SLE | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
- Sierra 2500 HD | 2020-2024 | AT4, AT4X, Base, Denali, Pro, SLE, SLT | 8 Cyl 6.6 L DIESEL, 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 DIESEL, 8 Cyl 6.6 L FLEX, 8 Cyl 6.6 L GAS
- Terrain | 2022 | AT4, Denali, SLE, SLT | 4 Cyl 1.5 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 Plug Wire
Part Number: 12731653
$35.70 MSRP: $67.04
You Save: $31.34 (47%)
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Product Specifications
- Other Name: Wire Assembly-Spark Plug; Cable Set; Plug Wire Set; Cable; Wire, Spark Plug Or Coil
- Replaces: 12670294, 19206446, 19351569
Fits the following GMC Models:
- Savana 2500 | 2010-2020 | 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 | 2010-2020 | 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 | 2017-2019 | 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 | 2017-2019 | Base, Denali, SLE, SLT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
- Yukon | 2007-2014 | Denali, SLE, SLT | 8 Cyl 4.8 L GAS, 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 Cable Set
Part Number: 19154585
$87.62 MSRP: $189.66
You Save: $102.04 (54%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Wire Kit, Spark Plug; Spark Plug Wire; Plug Wire Set; Wire Kit, Spark Or Glow Plug Ignition
- Replaces: 12173579
Fits the following GMC Models:
- C1500 | 1996-1997 | Sierra GT, Sierra SL, Sierra SLE, Sierra SLT, Sierra Special | 6 Cyl 4.3 L GAS
- Jimmy | 1996-1997 | Base, SL, SLE, SLS, SLT | 6 Cyl 4.3 L GAS
- K1500 | 1996-1997 | Sierra SL, Sierra SLE, Sierra SLT, Sierra Special | 6 Cyl 4.3 L GAS
- Safari | 1996-1997 | Base, SL, SLE, SLT, SLX | 6 Cyl 4.3 L GAS
- Savana 2500 | 1997 | Base | 6 Cyl 4.3 L GAS
- Sonoma | 1996-1997 | SL, SLE, SLS | 6 Cyl 4.3 L GAS
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GMC Cable Set
Part Number: 19172240
$39.62 MSRP: $74.39
You Save: $34.77 (47%)
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Product Specifications
- Other Name: Wire Kit, Spark Plug; Spark Plug Wire; Wire Kit, Spark Or Glow Plug Ignition
- Replaces: 12073990
Fits the following GMC Models:
- S15 | 1989-1990 | Base, High Sierra, Sierra Classic | 4 Cyl 2.5 L GAS
- Sonoma | 1991 | Base, SLE | 4 Cyl 2.5 L GAS
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GMC Cable Set
Part Number: 19351562
$20.50 MSRP: $38.49
You Save: $17.99 (47%)
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Product Specifications
- Other Name: Wire Assembly, Spark Plug #4 Cylinder; Spark Plug Wire; Wire, Spark Plug Or Coil
- Replaces: 12173580, 12192358
Fits the following GMC Models:
- Savana 1500 | 2004-2007 | Base, LS, LT, SLE | 6 Cyl 4.3 L GAS
- Savana 2500 | 2004-2006 | Base, SLE | 6 Cyl 4.3 L GAS
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GMC Control Module
Part Number: 84665243
$57.87 MSRP: $116.19
You Save: $58.32 (51%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Harness, Engine Wiring; Control Module Harness
- Replaces: 84243677, 84430009
Fits the following GMC Models:
- Sierra 1500 | 2020-2022 | AT4, AT4X, Denali, Denali Ultimate, Elevation, SLE, SLT | 6 Cyl 3.0 L DIESEL
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GMC Harness
Part Number: 55496294
$38.68 MSRP: $60.60
You Save: $21.92 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Harness, Engine Wiring
Fits the following GMC Models:
- Yukon | 2021-2023 | Denali, SLE, SLT | 6 Cyl 3.0 L DIESEL
- Yukon XL | 2021-2023 | Denali, SLE, SLT | 6 Cyl 3.0 L DIESEL
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GMC Cable Set
Part Number: 12073933
Product Specifications
- Other Name: Wire Kit, Spark Plug; Spark Plug Wire; Ignition Set; Wire Kit, Spark Or Glow Plug Ignition
Fits the following GMC Models:
- Safari | 1987 | Base | 4 Cyl 2.5 L GAS
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GMC Cable Set
Part Number: 12043723
Product Specifications
- Other Name: Wire Kit, Spark Plug; Spark Plug Wire; Wire Kit, Spark Or Glow Plug Ignition
Fits the following GMC Models:
- Caballero | 1984 | Amarillo, Base, Diablo | 6 Cyl 3.8 L GAS

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GMC Spark Plug Wires Parts Questions & Experts Answers

Cable Set
19171857
Q: How to Service and Repair Spark Plug Wires on GMC Savana 3500?
A: In order to service and repair the Spark Plug Wires, you will need to remove the engine cover. Open the left side of the engine enclosure and remove the Spark Plug wire from each Spark Plug at the left side of the engine. Twists the boots 1/2 turn before pulling away and pulling only the boot or using the tool specifically designed for the purpose of removing the boot. Follow the same process for the right side engine's Spark Plug Wires. Then, remove the Spark Plug wire from the Distributor, twisting each boot 1/2 turn and tugging on the boot only or using a tool for the purpose. However, look for the Spark Plug Wires on the wire clips and pull them out, using a coil wire to pull the wire out of the Distributor and coil as well. For installation a little bit of dielectric silicone grease (GM P/N 12345579) should be applied on each boot of the Spark Plug Wires. Mount the coil wire onto the coil wire to the Distributor, and the Spark Plug wire onto the Distributor. Connect each of the Spark Plug Wires to each Spark Plug on the right side, each of the Spark Plug Wires to each Spark Plug on the left side than secure the Spark Plug Wires into the clips. Check wiring for proper installation by pushing the side of the boot to check seating, re-looping loose boots, and keeping wire routings to prevent the radio ignition noise, cross firing of the plugs, or shorting leads to ground. Finally, reinstall the engine cover.
Cable Set
19433890
Q: How to replace the Spark Plug Wires on GMC Savana 2500?
A: Begin the Spark Plug wire replacement process by removing the engine cover. Remove the Spark Plug wire by first twisting every wire 1/2 turn then pulling only on the boot area to detach it from each Spark Plug. Start wire removal from the Ignition Coil by applying 1/2-boot twist action followed by boot extraction only. When working with the square design melco(R) Spark Plug wire use a piece that measures 145 mm (5.70 in) from the wire seal to wire seal point while the round design delphi(R) needs one that measures 110 mm (4.30 in) between wire seal points. The ignition coils come from two manufacturers: the ignition coils from melco(R) (square design) and delphi(R) (round design) require unique Spark Plug Wires and respective mounting brackets called melco(R) (square design) coil mounting bracket and delphi(R) (round design) coil mounting bracket. Begin Spark Plug wire installation by connecting wires to the Ignition Coil followed by connecting wires to each Spark Plug. Verify proper boot installation by lightly pressing each side of the wire boot and correct any loose fittings. Finally, reinstall the engine cover.
Wire Connector
12579355
Q: How to Replace Spark Plug Wires on GMC Sierra 1500?
A: Begin the Spark Plug wire replacement process by carefully noting their proper placement. Use either a tool or carefully twist the boot 1/2 turn before pulling it from the Spark Plug (1, 2). The next step entails removing Spark Plug wire boots from the Ignition Coil through the same procedure. Next cut open the Spark Plug wire separators so you can pull out the Spark Plug Wires. Reviewing boot to wire fit before installation is essential to maintain Spark Plug wire core integrity and prevent engine misfire or crossfire because improper seating leads to wire damage. For installed old Spark Plug Wires the application of dielectric grease gm pn 12345579 (Canadian PN 10953481) or equivalent inside Spark Plug wire boots must occur. Follow these installation steps: put Spark Plug Wires in place, make sure Spark Plug wire separators get closed, then secure Spark Plug wire boots to each Ignition Coil before attaching (1, 2) each boot to the Spark Plug. For proper Spark Plug wire examination check their route (1, 2, 3, 4, 5, 6) while also checking boot seating by pushing all boots sideways before reboots and fresh dielectric grease application in each boot during installation operations.