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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Chevrolet Blazer Spark Plug Wire
86 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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DelphiPart # XS10280
Spark Plug Wire Set - Delphi XS10280
4.645 Reviews
$40.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1987-1987 Chevrolet LLV, 1986-1986 Buick Somerset, 1985-1987 Chevrolet S10, 1985-1987 Chevrolet S10 Blazer, 1985-1987 GMC S15, 1985-1987 GMC S15 Jimmy, 1985-1986 Buick Century, 1985-1986 Chevrolet Astro, 1985-1986 GMC Safari, 1985-1986 Oldsmobile Calais, 1985-1986 Pontiac Fiero, 1985-1986 Pontiac Grand Am, 1985-1985 Buick Somerset Regal, 1984-1986 Buick Skylark, 1984-1986 Chevrolet Camaro, 1984-1986 Chevrolet Celebrity, 1984-1986 Oldsmobile Cutlass Ciera, 1984-1986 Pontiac 6000, 1984-1986 Pontiac Firebird, 1984-1985 Chevrolet Citation II
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet Blazer
Item LocatedUnited States
QuantityOne Set
Part interchange
XS10280, 2X1016, QW854, 704J, 9704J, 700257, 700378, 780068,
...View moreitem #1001W91E
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DensoPart # 671-6056
Spark Plug Wire Set - Denso 671-6056
51 Reviews
$52.99
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3-year warranty
90 days free return
Fits 1995-1995 Chevrolet Blazer, 1995-1995 Chevrolet S10, 1995-1995 GMC Jimmy, 1995-1995 GMC Sonoma
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet Blazer
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6056, 116058, 35-6153, 6716056, VWC028, 96645, 96184, 700983,
...View moreitem #100317ZH
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DensoPart # 671-8070
Spark Plug Wire Set - Denso 671-8070
51 Reviews
$51.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1975-1975 GMC Sprint, 1974-1974 GMC C25/C2500 Suburban, 1974-1974 GMC Sprint, 1974-1974 GMC Sprint, 1974-1974 GMC Sprint, 1973-1974 Chevrolet Blazer, 1973-1974 Chevrolet C10 Pickup, 1973-1974 Chevrolet C10 Suburban, 1973-1974 Chevrolet C20 Pickup, 1973-1974 Chevrolet C20 Suburban, 1973-1974 Chevrolet C30 Pickup, 1973-1974 Chevrolet K10 Pickup, 1973-1974 Chevrolet K10 Suburban, 1973-1974 Chevrolet K20 Pickup, 1973-1974 Chevrolet K20 Suburban, 1973-1974 Chevrolet K30 Pickup, 1973-1974 Chevrolet P20 Van, 1973-1974 Chevrolet P30 Van, 1973-1974 GMC C15/C1500 Pickup, 1973-1974 GMC C15/C1500 Suburban
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet Blazer
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8070, 118072, 35-8333, 6718070, 96203, 700134, 708C, 2X1134,
...View moreitem #100315Z2
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DensoPart # 671-8030
Spark Plug Wire Set - Denso 671-8030
51 Reviews
$53.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1984-1984 Oldsmobile Cutlass Calais, 1982-1983 Chevrolet Camaro, 1982-1982 Chevrolet C10 Suburban, 1982-1982 Chevrolet C10 Suburban, 1982-1982 Chevrolet C30, 1982-1982 Chevrolet K10 Suburban, 1982-1982 Chevrolet K30, 1982-1982 GMC C1500 Suburban, 1982-1982 GMC C1500 Suburban, 1982-1982 GMC C2500 Suburban, 1982-1982 GMC K1500 Suburban, 1982-1982 GMC K1500 Suburban, 1981-1982 Chevrolet C10, 1981-1982 Chevrolet C10, 1981-1982 Chevrolet C20, 1981-1982 Chevrolet C20, 1981-1982 Chevrolet C20 Suburban, 1981-1982 Chevrolet C20 Suburban, 1981-1982 Chevrolet K10, 1981-1982 Chevrolet K10
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet Blazer
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8030, 118028, 35-8129, 6718030, 96279, 96282, 700251, 618F,
...View moreitem #100314SV
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DensoPart # 671-8008
Spark Plug Wire Set - Denso 671-8008
51 Reviews
$58.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1980-1982 Chevrolet K30, 1980-1980 Chevrolet K10, 1980-1980 GMC K1500, 1979-1982 GMC C2500, 1979-1982 GMC C2500 Suburban, 1979-1982 GMC C3500, 1979-1982 GMC K3500, 1979-1982 GMC P3500, 1979-1980 GMC C1500, 1979-1980 GMC C1500 Suburban, 1979-1979 Chevrolet P20, 1979-1979 GMC P1500, 1977-1982 Chevrolet C20, 1977-1982 Chevrolet C20 Suburban, 1977-1982 Chevrolet C30, 1977-1982 Chevrolet P30, 1977-1980 Chevrolet C10, 1977-1980 Chevrolet C10 Suburban, 1977-1978 Chevrolet K20, 1977-1978 GMC C15
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet Blazer
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8008, 118003, 35-8104, 6718008, 96292, 96288, 700239, 608H,
...View moreitem #100318CR
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DensoPart # 671-8027
Spark Plug Wire Set - Denso 671-8027
51 Reviews
$51.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1986-1986 Chevrolet C10, 1986-1986 Chevrolet K10, 1986-1986 Chevrolet K10 Suburban, 1986-1986 Chevrolet K20, 1986-1986 Chevrolet K30, 1986-1986 GMC C2500 Suburban, 1986-1986 GMC C3500, 1986-1986 GMC K2500, 1985-1986 Chevrolet C10, 1985-1986 Chevrolet C10 Suburban, 1985-1986 Chevrolet C10 Suburban, 1985-1986 Chevrolet C20, 1985-1986 Chevrolet C20, 1985-1986 Chevrolet C20 Suburban, 1985-1986 Chevrolet C20 Suburban, 1985-1986 Chevrolet C30, 1985-1986 Chevrolet K10, 1985-1986 Chevrolet K10 Suburban, 1985-1986 Chevrolet K20 Suburban, 1985-1986 Chevrolet K20 Suburban
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet Blazer
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8027, 118025, 35-8126, 6718027, 96282, 700251, 608N, 09647,
...View moreitem #1003166L
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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!