Vehicle Set: Click here to shop 2003 GMC Sierra 2500 HD parts.

2003 GMC Sierra 2500 HD Spark Plugs

Looking for aftermarket parts to modify or upgrade your 2003 GMC Sierra 2500 HD with spark plugs? At Tunersports.com we carry a huge selection of the top name brand performance spark plug parts and accessories.

Spark Plug Parts:

Only show in-stock parts

NGK Iridium

IN STOCK - LOW 1465 NGK Laser Iridium plugs were designed specifically for the performance enthusiast. Fine wire center electrode ensures high durability and a consistently stable spark. Iridium alloy has an extremely high melting point, perfect for today's high-tech, high-performance engines.... NGK Iridium Spark Plug Box of 4 (IZTR5B11) 2001-2019 GMC Sierra 2500 HD SLE / SLT 2002-2005 GMC Sierra 2500 HD Base 2003-2014 GMC Sierra 2500 HD WT $60.36 Details

NGK Laser Platinum

OUT OF STOCK 3784 NGK Laser Platinum Series plugs provide high ignitability and longer service life. Laser welded dual platinum surfaces ensure slow wear rate providing stable idel, superior anti fouling, improved fuel efficiency and lower emissions.... NGK Laser Platinum Spark Plug Box of 4 (PTR5D-10) 2001-2017 GMC Sierra 2500 HD SLE / SLT 2002-2005 GMC Sierra 2500 HD Base 2003-2014 GMC Sierra 2500 HD WT $60.70 Details
OUT OF STOCK 7862 NGK Laser Platinum Series plugs provide high ignitability and longer service life. Laser welded dual platinum surfaces ensure slow wear rate providing stable idel, superior anti fouling, improved fuel efficiency and lower emissions.... NGK Laser Platinum Spark Plug Box of 4 (PZTR5A-15) 2001-2006 GMC Sierra 2500 HD SLE / SLT 2002-2005 GMC Sierra 2500 HD Base 2003-2006 GMC Sierra 2500 HD WT $60.70 Details