Buick/Cadillac 3.0L Fuel Injector 12629927/12634126 OEM Standard

Buick and Cadillac 3.0L engine dedicated injector (OEM: 12629927/12634126) uses OEM-standard design with broad compatibility; precisely controls fuel injection and atomization to stabilize air–fuel mixture. Replacement resolves rough idle, weak acceleration, or high fuel consumption, restoring engine smoothness. If starting difficulty, black smoke from exhaust, or check engine light, injector may be aging; replace promptly to protect performance.