GMC P2500 Spark Plug Replacement

Heavy Duty; Gap 0.045" OE Equivalent Design

Gap 0.035in OE Type ; Plug Type RV12YC

Gap 0.045in OE Type ; Plug Type RV15YC4

Gap 0.035 O.E. Recommended Resistor Plug with Patented U-Groove Design

Gap 0.044 O.E. Recommended Resistor Plug with Patented U-Groove Design

Gap 0.035 O.E. Recommended Resistor Plug with Patented U-Groove Design

Light Duty Gap 0.045" OE Equivalent Design

Heavy Duty; Gap 0.045" OE Equivalent Design

Gap 0.035" OE Equivalent Design

Original Center Electrode Material is Copper/Nickel Do Not Gap, Gap is Preset

Gap 0.045in; Plug Type RV17PMC4

Gap .045 (in); Auto

Light Duty Gap 0.045"

Heavy Duty; Gap 0.045"

Gap 0.035"

Gap: .045; Light Duty Enhanced Tapered Ground Electrode w/ Platinum Chip

Gap 0.040 Platinum TT - Twin-Tip Technology Design with Platinum Center Electrode and Titanium Enhanced Ground Strap

Gap 0.040 Platinum TT - Twin-Tip Technology Design with Platinum Center Electrode and Titanium Enhanced Ground Strap

Gap 0.045in; Plug Type RV17PMP4

Gap .035 (in); Auto

Gap 0.035"

Original Center Electrode Material is Copper/Nickel Do Not Gap, Gap is Preset

Heavy Duty; Gap 0.045"

Light Duty Gap 0.045"

Gap 0.035"

Gap 0.044 Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir)

Gap 0.044 Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir)

Gap .035 (in)

Gap 0.040 Iridium TT - Ultimate Endurance and Power, 0.4mm Iridium and 0.7mm Platinum Twin-Tip Technology

Gap 0.040 Iridium TT - Ultimate Endurance and Power, 0.4mm Iridium and 0.7mm Platinum Twin-Tip Technology

Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap Available While Supplies Last

Single; Plug Type 6IR5Y; [Available While Supplies Last];0.035 in. Plug Gap