Is your check engine light on with a code for a bad O2 sensor? This XCBOOCH set might be your fix. You get TWO sensors (part number 213-4229) in the pack, which is often what you need since vehicles usually have more than one. They're direct replacements designed to fit a ton of popular Chevy and GMC trucks and SUVs from the early 2000s up to about 2015. We're talking Chevy Avalanche, Express, Silverado (1500, 2500, 3500), Suburban, Tahoe; and GMC Savana, Sierra, Yukon, Envoy, and more (check the full list in the description to be sure for your specific year and model). They're built to OEM standards, so they should plug right in and work like the original. Installation isn't too bad if you're handy – you'll need an O2 sensor socket wrench. Remember to disconnect the battery first, unscrew the old sensor, and screw in the new one. Afterward, you'll likely need to clear the error code with a scanner. Always double-check the part number and fitment using the Amazon vehicle fitment tool or by comparing it to your old sensor. A straightforward solution to help restore your engine's fuel efficiency and emissions performance.