2011 Cadillac STS Spark Plugs

Genuine GM spark plugs for the 2011 Cadillac STS, at wholesale prices. Heat range and gap are specified per engine, and GM has revised plug part numbers mid-generation on several engines. Sigma platform rear-drive sedan, offered with the Northstar V8 and in supercharged STS-V form.

Symptoms to look for

Misfires under load, rough idle, or a drop in fuel economy. On a full-size car, option packages divide this group more than the model year does.

What sets these apart

• No hassle returns. If the spark plugs is not right, send it back.
• Warranty intact. OEM spark plugs keep coverage that an aftermarket part can void.
• Wholesale pricing. Most spark plugs numbers land well below dealer list.
• No aftermarket substitutes. These are GM spark plugs, not OE-style equivalents.

Ordering correctly

A part validated on this vehicle behaves differently from one validated across a range of vehicles. Fitment questions are the one thing worth a phone call before checkout rather than after delivery. We ship from Dallas, which keeps transit times short across most of the country.