6 Pieces Fuel Injector 12663380 for GMC Vehicle 2012-2017 Acadia Condition: New Aftermarket Part Note: We recommend replacing the entire set of fuel injectors to ensure the engine's optimal performance. Due to differences in oil output and atomization concentration between and aftermarket parts, they should not be mixed. Replacing the entire set of injectors helps avoid potential issues.Replacement Part Number: 12634491, 12663380 Applications:Fit for GMC Vehicle: 2012-2017 Acadia