GMC Sierra 1500 HD Classic Spark Plug Replacement

Gap 0.040in; Plug Type RS12YC

Original Center Electrode Material is Iridium Do Not Gap, Gap is Preset

Gap 0.040in; Plug Type RS14PMC4

Gap: .040/1.0mm Enhanced Tapered Ground Electrode w/ Platinum Chip

Gap 0.040"

Original Center Electrode Material is Iridium Do Not Gap, Gap is Preset

Gap .040 (in)

Gap 0.040in; Plug Type RS14PMP4

Original Center Electrode Material is Iridium Do Not Gap, Gap is Preset

Gap 0.040in OE Type ; Plug Type RS12WMPB4

Gap 0.040"

Gap .040 (in)

Gap 0.040" OE Equivalent Design 100,000 mi OE Mfr Recommended Service Interval

Gap 0.040"

Gap .040 (in)

Gap 0.040"

Single; Plug Type 1IR5L; 14 mm. Thread; 0.6910 Reach