What Does A Spark Plug Do
Spark plugs can make or break your engine’s performance. Understand how they work, how to recognize a faulty one, and get expert advice on choosing the right spark plug for better engine health.
Jul 21, 2026
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GMC Spark Plug Wire
228 itemsMisfires, rough idle, or weak acceleration can start with aging ignition wires. Replace your spark plug wires set to help deliver steady spark and restore smoother engine performance.
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DensoPart # 671-8012
Spark Plug Wire Set - Denso 671-8012
51 Reviews
$59.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1995-1996 AM General Hummer, 1992-1993 Chevrolet Blazer, 1992-1993 Chevrolet C1500 Suburban, 1992-1993 Chevrolet C2500 Suburban, 1992-1993 Chevrolet K1500 Suburban, 1992-1993 Chevrolet K2500 Suburban, 1992-1993 GMC C1500 Suburban, 1992-1993 GMC C2500 Suburban, 1992-1993 GMC K1500 Suburban, 1992-1993 GMC K2500 Suburban, 1992-1993 GMC Yukon, 1989-1991 Chevrolet R1500 Suburban, 1989-1991 Chevrolet R2500 Suburban, 1989-1991 Chevrolet R3500, 1989-1991 Chevrolet V1500 Suburban, 1989-1991 Chevrolet V2500 Suburban, 1989-1991 Chevrolet V3500, 1988-1993 Chevrolet C1500, 1988-1993 Chevrolet C1500, 1988-1993 Chevrolet C2500
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Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8012, 35-8109, 706, MSW1829, 6718012, 618V, 628K, 11-848M,
...View moreitem #100316A1
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DensoPart # 671-8187
Spark Plug Wire Set - Denso 671-8187
51 Reviews
$64.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2018-2019 Chevrolet Tahoe, 2016-2019 Chevrolet Suburban, 2015-2019 Cadillac Escalade, 2015-2019 GMC Yukon, 2015-2017 Chevrolet Tahoe, 2015-2015 Chevrolet Suburban, 2014-2019 Chevrolet Corvette, 2014-2019 Chevrolet Silverado 1500, 2014-2016 GMC Sierra, 2014-2015 Chevrolet Silverado 1500
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Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8187, 118083, 758EE, 7895
item #1004YY31
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DensoPart # 671-4228
Spark Plug Wire Set - Denso 671-4228
51 Reviews
$34.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1994-1994 Pontiac Sunrunner, 1994-1994 Suzuki Sidekick, 1992-1993 Asuna Sunrunner, 1991-1995 Geo Tracker, 1991-1991 Chevrolet Tracker, 1991-1991 GMC Tracker, 1989-1992 Suzuki Sidekick, 1986-1995 Suzuki Samurai, 1985-1985 Suzuki Samurai
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Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-4228, 35-4261, MSW2106, 611, 6714228, TE41, SE83, 764G,
...View moreitem #100317T9
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DensoPart # 671-8016
Spark Plug Wire Set - Denso 671-8016
51 Reviews
$52.99
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3-year warranty
90 days free return
Fits 1987-1988 Chevrolet R30, 1987-1988 Chevrolet V30, 1987-1988 GMC R3500, 1987-1988 GMC V3500, 1985-1986 Chevrolet C10, 1985-1986 Chevrolet C10 Suburban, 1985-1986 Chevrolet C20, 1985-1986 Chevrolet C20 Suburban, 1985-1986 Chevrolet C30, 1985-1986 Chevrolet K10, 1985-1986 Chevrolet K10 Suburban, 1985-1986 Chevrolet K20, 1985-1986 Chevrolet K20 Suburban, 1985-1986 Chevrolet K30, 1985-1986 GMC C1500, 1985-1986 GMC C1500 Suburban, 1985-1986 GMC C2500, 1985-1986 GMC C2500 Suburban, 1985-1986 GMC C3500, 1985-1986 GMC K2500
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Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8016, 35-8113, MSW1273, 6718016, 628M, 11-824M, 2X1110, QW823,
...View moreitem #100313Q8
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DensoPart # 671-4040
Spark Plug Wire Set - Denso 671-4040
51 Reviews
$54.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1997-1997 Isuzu Hombre, 1996-1997 Chevrolet S10, 1996-1997 GMC Sonoma, 1996-1996 Isuzu Hombre
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Vehicle: GMC
Item LocatedUnited States
Quantity4
Part interchange
671-4040, 637, 35-4121, MSW1792, 6714040, IX53, 764C, 954N,
...View moreitem #1002HVQ8
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DensoPart # 671-8022
Spark Plug Wire Set - Denso 671-8022
51 Reviews
$54.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1995-1995 Chevrolet Tahoe, 1995-1995 GMC C1500 Suburban, 1995-1995 GMC K1500 Suburban, 1994-1995 Chevrolet C1500, 1994-1995 Chevrolet C1500, 1994-1995 Chevrolet C1500 Suburban, 1994-1995 Chevrolet C2500, 1994-1995 Chevrolet C2500, 1994-1995 Chevrolet C2500 Suburban, 1994-1995 Chevrolet C3500, 1994-1995 Chevrolet K1500, 1994-1995 Chevrolet K1500, 1994-1995 Chevrolet K1500 Suburban, 1994-1995 Chevrolet K2500, 1994-1995 Chevrolet K2500, 1994-1995 Chevrolet K2500 Suburban, 1994-1995 Chevrolet K3500, 1994-1995 GMC C1500, 1994-1995 GMC C1500, 1994-1995 GMC C2500
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Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8022, 35-8120, 739, MSW1784, 6718022, 718D, 11-867M, 2X1199,
...View moreitem #100317D9
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DensoPart # 671-8054
Spark Plug Wire Set - Denso 671-8054
51 Reviews
$83.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2000-2000 GMC Yukon, 1999-2000 Cadillac Escalade, 1999-1999 Chevrolet K1500, 1999-1999 GMC C1500, 1999-1999 GMC K1500, 1998-1999 GMC Yukon, 1998-1998 Chevrolet K2500, 1998-1998 GMC K2500, 1996-2002 Chevrolet Express 1500, 1996-2002 Chevrolet Express 1500, 1996-2002 Chevrolet Express 2500, 1996-2002 Chevrolet Express 2500, 1996-2002 Chevrolet Express 3500, 1996-2002 GMC Savana 1500, 1996-2002 GMC Savana 1500, 1996-2002 GMC Savana 2500, 1996-2002 GMC Savana 2500, 1996-2002 GMC Savana 3500, 1996-2000 Chevrolet C2500, 1996-2000 Chevrolet C3500
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Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8054, 35-8150, 35-8325, 701, MSW1786, 6718054, 718Q, 748F,
...View moreitem #100318GW
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DensoPart # 671-6103
Spark Plug Wire Set - Denso 671-6103
51 Reviews
$34.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1975-1976 Ford Granada, 1975-1976 Ford Granada, 1975-1976 Ford Maverick, 1975-1976 Ford Maverick, 1975-1976 Mercury Comet, 1975-1976 Mercury Comet, 1975-1976 Mercury Monarch, 1975-1976 Mercury Monarch, 1974-1974 Ford Bronco, 1974-1974 Ford Gran Torino, 1974-1974 Ford Gran Torino, 1974-1974 Ford Mustang II, 1974-1974 Ford Mustang II, 1974-1974 Ford Mustang II, 1974-1974 Ford Mustang II, 1974-1974 Ford Torino, 1974-1974 Mercury Comet, 1974-1974 Mercury Comet, 1974-1974 Mercury Montego, 1973-1973 Ford Bronco
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Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6103, 126033, 35-6188, MSW1903, 6716103, 96100, 700145, 700165,
...View moreitem #100315K4
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DensoPart # 671-8045
Spark Plug Wire Set - Denso 671-8045
51 Reviews
$45.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1974-1974 Chevrolet Bel Air, 1974-1974 Chevrolet Caprice, 1974-1974 Chevrolet Corvette, 1974-1974 Chevrolet El Camino, 1974-1974 Chevrolet El Camino, 1974-1974 Chevrolet El Camino, 1974-1974 Chevrolet Impala, 1974-1974 Chevrolet K10 Pickup, 1974-1974 Chevrolet Laguna, 1974-1974 Chevrolet Malibu, 1974-1974 Chevrolet Malibu, 1974-1974 Chevrolet Malibu, 1974-1974 Chevrolet Monte Carlo, 1974-1974 Chevrolet Monte Carlo, 1974-1974 GMC C25/C2500 Suburban, 1974-1974 GMC P35/P3500 Van, 1974-1974 GMC Sprint, 1974-1974 GMC Sprint, 1973-1974 Chevrolet Bel Air, 1973-1974 Chevrolet C10 Pickup
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Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8045, 118044, 35-8331, 6718045, 96893, 700151, 508R, CH851,
...View moreitem #1003153Z
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DensoPart # 671-6235
Spark Plug Wire Set - Denso 671-6235
51 Reviews
$70.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2006-2006 Chevrolet Silverado 1500, 2006-2006 Chevrolet Silverado 1500, 2002-2006 GMC Sierra 1500, 2002-2005 Chevrolet Silverado 1500
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Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6235, 116077, 35-6337, 6716235, 97006, 746MM, 88984266, 79476
item #100315D2
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DensoPart # 671-4045
Spark Plug Wire Set - Denso 671-4045
51 Reviews
$45.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1998-2003 Chevrolet S10, 1998-2003 GMC Sonoma, 1998-2000 Isuzu Hombre, 1995-1997 Pontiac Sunfire, 1994-1995 Chevrolet LLV, 1994-1995 GMC Sonoma, 1993-1997 Chevrolet Cavalier, 1993-1996 Buick Century, 1993-1996 Oldsmobile Cutlass Ciera, 1993-1993 Chevrolet Lumina, 1992-1996 Chevrolet Beretta, 1992-1996 Chevrolet Corsica
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Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-4045, MSW1780, MSW1736, MSW1793, 35-4126, 714, 6714045, GMX082,
...View moreitem #1002HUH8
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DensoPart # 671-4006
Spark Plug Wire Set - Denso 671-4006
51 Reviews
$41.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1995-1997 Geo Metro, 1995-1996 Pontiac Firefly, 1995-1995 Geo Tracker, 1995-1995 Suzuki Swift, 1993-1993 Suzuki Swift, 1992-1994 Suzuki Swift, 1992-1994 Suzuki Swift, 1992-1994 Suzuki Swift, 1992-1992 Chevrolet Metro, 1989-1990 Chevrolet Tracker, 1989-1990 Geo Tracker, 1989-1990 GMC Tracker, 1989-1989 Geo Spectrum, 1989-1989 Geo Spectrum, 1989-1989 Isuzu I-Mark, 1988-1989 Isuzu I-Mark, 1988-1989 Mazda 323, 1988-1989 Mazda 323, 1988-1989 Mazda 323, 1988-1988 Mazda 323
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-4006, 185, 299, MSW1918, 35-4006, 6714006, ZE04, IX43,
...View moreitem #1002HXLG
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DensoPart # 671-8160
Spark Plug Wire Set - Denso 671-8160
51 Reviews
$83.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2007-2007 Chevrolet Silverado 2500 HD Classic, 2007-2007 Chevrolet Silverado 3500 Classic, 2007-2007 GMC Sierra 2500 HD Classic, 2007-2007 GMC Sierra 3500 Classic, 2006-2006 Chevrolet Silverado 3500, 2006-2006 Chevrolet Suburban 2500, 2003-2006 Chevrolet Avalanche 2500, 2003-2006 Chevrolet Silverado 2500 HD, 2003-2006 GMC Sierra 2500 HD, 2003-2006 GMC Sierra 3500, 2003-2006 GMC Yukon XL 2500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8160, 118078, 35-8343, 6718160, EUC053, 748KK, 7877
item #1004YZQG
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DensoPart # 671-8044
Spark Plug Wire Set - Denso 671-8044
51 Reviews
$49.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1984-1986 Jeep Grand Wagoneer, 1979-1979 American Motors Spirit, 1978-1979 American Motors AMX, 1978-1979 American Motors Concord, 1978-1979 American Motors Pacer, 1977-1986 Jeep J20, 1976-1981 Jeep CJ7, 1976-1976 Jeep J20, 1976-1976 Jeep J20, 1975-1983 Jeep Wagoneer, 1975-1981 Jeep CJ5, 1975-1978 Jeep Wagoneer, 1975-1977 American Motors Hornet, 1975-1977 American Motors Matador, 1975-1976 American Motors Gremlin, 1975-1975 Jeep CJ6, 1975-1975 Jeep J20, 1974-1986 Jeep J10, 1974-1983 Jeep Cherokee, 1974-1978 Jeep Cherokee
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8044, 35-8142, MSW1914, 6718044, 518F, 508G, 11-865M, 2X1019,
...View moreitem #100316Z8
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DensoPart # 671-8009
Spark Plug Wire Set - Denso 671-8009
51 Reviews
$54.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1977-1979 Checker Marathon, 1977-1977 Buick Century, 1977-1977 Buick Century, 1977-1977 Buick Regal, 1977-1977 Buick Regal, 1977-1977 Buick Skylark, 1977-1977 Chevrolet C10, 1977-1977 Chevrolet C10 Suburban, 1977-1977 Chevrolet C20, 1977-1977 Chevrolet C20 Suburban, 1977-1977 Chevrolet G10, 1977-1977 Chevrolet K10, 1977-1977 Chevrolet K10 Suburban, 1977-1977 Chevrolet K20, 1977-1977 Chevrolet K20 Suburban, 1977-1977 Chevrolet K30, 1977-1977 Chevrolet K30, 1977-1977 Chevrolet K5 Blazer, 1977-1977 Chevrolet Malibu, 1977-1977 Chevrolet Monte Carlo
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8009, 118004, 35-8105, 6718009, 96292, 96192, 700244, 908S,
...View moreitem #100314L9
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DensoPart # 671-8015
Spark Plug Wire Set - Denso 671-8015
51 Reviews
$69.99
Low stock: Only 2 left
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1992-1993 Chevrolet C2500 Suburban, 1992-1993 Chevrolet K2500 Suburban, 1992-1993 GMC C2500 Suburban, 1992-1993 GMC K2500 Suburban, 1991-1993 Chevrolet C2500, 1991-1993 Chevrolet K2500, 1991-1993 GMC C2500, 1991-1993 GMC K2500, 1990-1993 Chevrolet C3500, 1990-1993 Chevrolet G30, 1990-1993 Chevrolet K3500, 1990-1993 Chevrolet P30, 1990-1993 GMC C3500, 1990-1993 GMC G3500, 1990-1993 GMC K3500, 1990-1993 GMC P3500, 1990-1991 Chevrolet R2500 Suburban, 1990-1991 Chevrolet R3500, 1990-1991 Chevrolet V3500, 1990-1991 GMC R2500 Suburban
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8015, 118011, 35-8112, 6718015, 96274, 700430, 628H, CH8841,
...View moreitem #10031525
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DensoPart # 671-8007
Spark Plug Wire Set - Denso 671-8007
51 Reviews
$62.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1985-1986 Chevrolet Caprice, 1985-1985 Pontiac Parisienne, 1983-1986 Pontiac Bonneville, 1983-1986 Pontiac Grand Prix, 1983-1986 Pontiac Parisienne, 1983-1984 Chevrolet C10, 1983-1984 Chevrolet C10, 1983-1984 Chevrolet C10 Suburban, 1983-1984 Chevrolet C10 Suburban, 1983-1984 Chevrolet C20, 1983-1984 Chevrolet C20, 1983-1984 Chevrolet C20 Suburban, 1983-1984 Chevrolet C20 Suburban, 1983-1984 Chevrolet C30, 1983-1984 Chevrolet K10, 1983-1984 Chevrolet K10, 1983-1984 Chevrolet K10 Suburban, 1983-1984 Chevrolet K20, 1983-1984 Chevrolet K20 Suburban, 1983-1984 Chevrolet K30
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8007, 35-8103, MSW1275, 6718007, 608E, 11-837M, 2X1109, QW843,
...View moreitem #100315D0
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DensoPart # 671-8011
Spark Plug Wire Set - Denso 671-8011
51 Reviews
$55.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1985-1986 Chevrolet C20, 1985-1986 Chevrolet C20 Suburban, 1985-1986 Chevrolet C30, 1985-1986 Chevrolet K30, 1985-1986 Chevrolet P30, 1985-1986 GMC C2500, 1985-1986 GMC C2500 Suburban, 1985-1986 GMC C3500, 1985-1986 GMC K3500, 1985-1986 GMC P3500, 1985-1985 Chevrolet K20 Suburban, 1983-1984 Chevrolet C20, 1983-1984 Chevrolet C20 Suburban, 1983-1984 Chevrolet C30, 1983-1984 Chevrolet K30, 1983-1984 Chevrolet P30, 1983-1984 GMC C2500, 1983-1984 GMC C2500 Suburban, 1983-1984 GMC C3500, 1983-1984 GMC K3500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8011, 118006, 35-8107, 6718011, 96286, 700356, CH855, 618G,
...View moreitem #100313PH
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DensoPart # 671-8055
Spark Plug Wire Set - Denso 671-8055
51 Reviews
$101.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1996-2000 Chevrolet C2500, 1996-2000 Chevrolet C3500, 1996-2000 Chevrolet Express 3500, 1996-2000 Chevrolet K2500, 1996-2000 Chevrolet K3500, 1996-2000 GMC C2500, 1996-2000 GMC C3500, 1996-2000 GMC K2500, 1996-2000 GMC K3500, 1996-2000 GMC Savana 3500, 1996-1999 Chevrolet C2500 Suburban, 1996-1999 Chevrolet K2500 Suburban, 1996-1999 Chevrolet P30, 1996-1999 GMC C2500 Suburban, 1996-1999 GMC K2500 Suburban, 1996-1999 GMC P3500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8055, 35-8151, MSW1787, 6718055, 748G, 11-888M, 2X1205, QW1130,
...View moreitem #1003175U
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DensoPart # 671-8072
Spark Plug Wire Set - Denso 671-8072
51 Reviews
$87.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2005-2005 Chevrolet Express 3500, 2004-2005 GMC Savana 3500, 2004-2004 Buick Rainier, 2003-2005 Chevrolet Express 1500, 2003-2005 Chevrolet Express 2500, 2003-2005 Chevrolet Express 2500, 2003-2005 Chevrolet Express 2500, 2003-2005 Chevrolet Express 3500, 2003-2005 GMC Savana 1500, 2003-2005 GMC Savana 2500, 2003-2005 GMC Savana 2500, 2003-2005 GMC Savana 2500, 2003-2004 Chevrolet SSR, 2003-2004 Chevrolet Trailblazer EXT, 2003-2004 Isuzu Ascender, 2003-2003 GMC Envoy XL, 2003-2003 GMC Savana 3500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8072, 118075, 35-8337, 6718072, 97093, 700531, 748JJ, 7881
item #100316Z3
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What are spark plug wires?
Spark plug wires, also known as ignition cables or spark plug leads, are a set of wires that connect the ignition coil or distributor to the spark plugs in an internal combustion engine. They are responsible for transmitting high-voltage electrical energy from the ignition source to the spark plugs, which ignite the fuel-air mixture in the engine's cylinders.
The spark plug wires typically consist of a central core made of conductive materials such as copper, and an insulating layer made of materials like silicone or rubber to prevent electrical current from leaking. The wires are designed to withstand high temperatures and electrical interference and are often color-coded to ensure correct installation.
Signs of bad spark plug wires
Spark plug wires play a crucial role in ensuring reliable engine performance. Worn or damaged spark plug wires can cause misfires, rough idling, and poor fuel efficiency, so it's important to take regular maintenance and replace them as needed.
Engine knocking
When the spark plug wires fail, the engine may produce a knocking sound, particularly under heavy loads. This can be caused by pre-ignition or detonation, which can occur when the spark plug wires are not delivering enough energy to the spark plugs.
Rough shifting (automatic transmission)
In some cases, a damaged spark plug wire can cause rough shifting in an automatic transmission. This can be due to a drop in engine power caused by misfires or other problems related to the spark plug wires.
Burned spark plug wires
If you notice that your spark plug wires are discolored or burned, this can be a sign that they are not functioning properly. Burned spark plug wires can be caused by excessive heat, electrical interference, or other issues.
Poor acceleration
When the spark plug wires are failing, the engine may have trouble accelerating smoothly. This can be due to misfires or other problems related to the spark plug wires.
Stalling
A damaged spark plug wire can cause the engine to stall or cut out, particularly at idle. This can be due to a drop in engine power caused by misfires or other problems related to the spark plug wires.
How to change spark plug wires?
Replacing a spark plug wire set is a relatively simple task, and can usually be completed in under an hour. You can follow these steps:
1. Remove the worn or faulty spark wire set.
To avoid confusion and prevent accidentally switching the wires, it is recommended to replace each spark plug wire individually, starting with the longest one. When removing the wires from either the spark plug or distributor cap, it is important to loosen the connection by twisting or rotating the boot. Yanking or forcefully pulling on the wires may cause them to break. Only pull on the boot and refrain from pulling on the cable.
2. Install the new spark plug wire set
Install the new spark plug wires in the same location as the old wires, making sure to connect each wire to the correct spark plug. If your new spark plug wires have boots, be sure to push the boot firmly onto the spark plug until it clicks into place.
3. Test the new spark plug wires
Once you have installed the new spark plug wires, start the engine and check for any signs of misfires, rough idling, or other problems that could indicate an issue with the spark plug wires. If everything looks good, you're all set!