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2003 GMC Sierra 1500 - Spark Plugs

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  • Thread Reach (in) - 0.670 Inch
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ACDelco Copper Spark Plug - R44LTS6
Part #:
R44LTS6
Line:
ACD
12 Month Or 12,000 Mile Limited Warranty
Seat:   Tapered
Thread Size:   M14-1.25
Heat Range:   3

ACDelco Copper Spark Plug - R44LTSM
Part #:
R44LTSM
Line:
ACD
12 Month Or 12,000 Mile Limited Warranty
Seat:   Tapered
Thread Size:   M14-1.25
Heat Range:   4