GMC Suburban Spark Plug Replacement

3/8in Reach Spark Plugs Resistor Type Gap 0.030in ; Plug Type RJ6C

Non-Resistor Type Gap 0.035in OE Type ; Plug Type J8C

Gap 0.035in OE Type ; Plug Type RN14YC

Resistor Type Gap 0.035in ; Plug Type RN12YC

3/8in Reach Spark Plugs Resistor Type Gap 0.035in ; Plug Type RJ12YC

3/8in Reach Spark Plugs Non-Resistor Type Gap 0.035in OE Type ; Plug Type J12YC

Non-Resistor Type Gap 0.035in ; Plug Type N5C

3/8in Reach Spark Plugs Non-Resistor Type Gap 0.030in OE Type ; Plug Type J6C

Resistor Type Gap 0.035in ; Plug Type RJ8C

Non-Resistor Type Gap 0.035in OE Type ; Plug Type N12YC

Resistor Type Gap 0.035in ; Plug Type RN5C

Gap 0.032 O.E. Recommended Resistor Plug with Patented U-Groove Design

Gap 0.032 O.E. Recommended Resistor Plug with Patented U-Groove Design

Gap 0.027 O.E. Recommended Resistor Plug with Patented U-Groove Design

Gap 0.035" OE Equivalent Design

Gap 0.035" OE Equivalent Design

OE Style; Auto

Gap 0.035"

Gap 0.035in; Plug Type RN14PMC

Gap 0.035"

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 0.035in; Plug Type RN14PYP

Gap 0.044 Double Platinum Plug - Extra Long Life Double Platinum Plug with Platinum Ground Strap

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 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

0.035"