2011 GMC Sierra 2500 HD Spark Plugs

Genuine GM spark plugs for the 2011 GMC Sierra 2500 HD, at wholesale prices. Heat range and gap are specified per engine, and GM has revised plug part numbers mid-generation on several engines. GMT900 HD through 2014, K2XX HD from 2015 to 2019, and the T1XX HD from 2020.

What sends people here

Misfires under load, rough idle, or a drop in fuel economy. On a heavy duty pickup, trim, tow package and drivetrain each move part numbers within one model year.

Buying OEM, briefly

• Factory warranty. Genuine spark plugs carry GM coverage aftermarket cannot match.
• Dealer parts, not dealer prices. Compare our spark plugs pricing against a counter quote.
• Genuine GM only. Every spark plugs listing carries the original factory part number.
• Fitment checked by a person. Send the VIN and we verify the spark plugs before the box leaves.
• Central shipping origin. Dallas keeps spark plugs transit times short nationwide.

Before you order

Factory parts are built to the tolerances the vehicle was engineered around, not copied from a worn sample. A photo is rarely enough to order from. The VIN takes seconds and removes the guesswork. Freight is quoted at what it actually costs, not inflated to subsidize a headline discount.