GM Spark Plugs
availability
Conventional Spark Plug
GM
25193473
Black Onyx coating helps reduce corrosion
Copper core provides great heat transfer and helps maximize plug durability
In...
$2.35
MSRP $4.28
Save $1.93
45.1% Off 
Motorcraft Spark Plug
Ford
SP-521-X
6.8L. From 10/05/2009. 5.4L. To 10/05/2009.
$5.95
MSRP $8.73
Save $2.78
31.8% Off 
Conventional Spark Plug
GM
21025103
Black Onyx coating helps reduce corrosion
Copper core provides great heat transfer and helps maximize plug durability
In...
$2.45
MSRP $4.46
Save $2.01
45.1% Off 
Iridium Spark Plug
GM
12681663
Iridium is the latest in spark plug technology and is an exact replacement for vehicles' original components
Iridium composition...
$9.26
MSRP $16.88
Save $7.62
45.1% Off 
Iridium Spark Plug
GM
12664824
Iridium is the latest in spark plug technology and is an exact replacement for vehicles' original components
Iridium composition...
$14.70
MSRP $26.80
Save $12.10
45.1% Off 
Conventional Spark Plug
GM
05614168
Optional. Vendor:acdelco. Vendor #R43TSK. Black Onyx coating helps reduce corrosion
Copper core provides great heat transfer and helps...
$1.59
MSRP $2.90
Save $1.31
45.2% Off 
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Worn spark plugs can often be the cause of engine misfiring. Spark plugs are something that are built to last a while, but since they endure high heat and friction, they can wear out over time. They should be replaced if you find they are not functioning properly. For genuine GM parts at great prices, shop our online catalog for the right spark plugs by choosing the Year, Make and Model of your vehicle below.