Compatibility: 2006-2011 Buick Lucerne 4.6L 2006-2011 Cadillac DTS 4.6L 2003-2005 Chevrolet Astro 4.3L 2003-2005 GMC Safari 4.3L Q&A: Q:What is Differences Between upstream and downstream O2 Sensor? .
O2 Oxygen Sensor for Chevrolet Blazer S10 4.3L V6 2002 Upstream Downstream 3pcs
?3pcs Upper+Under Oxygen Sensor O2 02 for 2003-2005 Chevy Astro GMC Safari 4.3L
3pcs for 2003-04 Chevrolet S10 4.3L V6 Upstream+Downstream Oxygen Sensor 02 O2
3pcs for 96-00 Chevy Express 1500 2500 O2 Oxygen Sensor 02 Upstream Downstream
?Set 3pcs Upper+Down Oxygen Sensor O2 Sensors for 96-99 Chevy GMC P3500 P30 4.3L
3pcs For 1996 Ford F-150 F-250 Explorer 02 O2 Oxygen Sensor Upstream&Downstream
