Description

For Buick GMC Savana Chevy Express Pontiac Upstream Downstream O2 Oxygen Sensor Interchange Part Number "234-4087, ASG277,4A234-4087,A13444,AES20002,A-AFS123,A-AFS98,A-AFS97,AA12578459,AA12587214,AA19178921,AA19178924" Please check fitment notes & description for accurate information. Year Model Make Engine Position 2008-2009 Buick Allure V8 5.3L Upstream (Front);Downstream (Rear) 1996-1996 Buick Century L4 2.2L Downstream (Rear) 1996-2004 Buick Century V6 3.1L Downstream (Rear) 2008-2009 Buick Lacrosse V8 5.3L Upstream (Front);Downstream (Rear) 1996-2003 Buick Lesabre V6 3.8L Downstream (Rear) 1996-2003 Buick Park Avenue V6 3.8L Downstream (Rear) 2004-2005 Buick Rainier L6 4.2L Downstream (Rear) 2006-2006 Buick Rainier V8 5.3L Downstream (Rear) 1996-1996 Buick Regal V6 3.1L Downstream (Rear) 1996-2003 Buick Regal V6 3.8L Downstream (Rear) 2002-2005 Buick Rendezvous V6 2.8L Downstream (Rear) 1996-1999 Buick Riviera V6 3.6L Downstream (Rear) 2005-2007 Cadillac CTS V6 3.4L Downstream (Rear) 2005-2006 Cadillac CTS V6 3.8L Downstream (Rear) 2006-2007 Cadillac CTS-V V8 6.0L Upstream (Front) 1996-1999 Cadillac Deville V8 4.6L Downstream (Rear) 1996-1999 Cadillac Eldorado V8 4.6L Downstream (Rear) 2007-2007 Cadillac Escalade V8 6.2L Upstream (Front) 1996-1999 Cadillac Seville V8 4.6L Downstream (Rear) 2005-2006 Cadillac SRX V6 3.6L Downstream (Rear) 2005-2006 Cadillac SRX V8 4.6L Downstream (Rear) 2005-2007 Cadillac STS V6 3.6L Downstream (Rear) 2005-2006 Cadillac STS V8 4.6L Downstream (Rear) 2006-2007 Chevrolet Avalanche V8 5.3L Upstream (Front) 2006-2007 Chevrolet Avalanche V8 5.3L Upstream (Front) 2007-2007 Chevrolet Avalanche V8 6.0L Upstream (Front) 1996-2002 Chevrolet Camaro V6 3.8L Downstream (Rear) 1996-1997 Chevrolet Camaro V8 5.7L Downstream (Rear) 1998-2002 Chevrolet Camaro V8 5.7L Upstream (Front);Downstream (Rear) 2004-2005 Chevrolet Colorado L4 2.8L Downstream (Rear) 2004-2005 Chevrolet Colorado L5 3.5L Downstream (Rear) 2009-2011 Chevrolet Colorado V8 5.3L Upstream (Front) 2008-2009 Chevrolet Equinox V6 3.6L Downstream (Rear) 2003-2003 Chevrolet Express 1500 V6 4.3L Upstream (Front Right);Downstream (Rear Right) 2004-2006 Chevrolet Express 1500 V6 4.3L Upstream (Front Right);Downstream (Rear Right) 2003-2003 Chevrolet Express 1500 V8 5.3L Upstream (Front Right);Downstream (Rear Right) 2004-2006 Chevrolet Express 1500 V8 5.3L Upstream (Front Right);Downstream (Rear Right) 2007-2007 Chevrolet Express 1500 V8 5.3L Upstream (Front Right);Downstream (Rear Right) 2003-2003 Chevrolet Express 2500 V6 4.3L Upstream (Front Right);Downstream (Rear Right) 2004-2005 Chevrolet Express 2500 V6 4.3L Upstream (Front Right);Downstream (Rear Right) 2003-2003 Chevrolet Express 2500 V8 4.8L Upstream (Front Right);Downstream (Rear Right) 2004-2007 Chevrolet Express 2500 V8 4.8L Upstream (Front Right);Downstream (Rear Right) 2003-2003 Chevrolet Express 2500 V8 5.3L Upstream (Front Right);Downstream (Rear Right) 2004-2005 Chevrolet Express 2500 V8 5.3L Upstream (Front Right);Downstream (Rear Right) 2003-2003 Chevrolet Express 2500 V8 6.0L Upstream (Front Right);Downstream (Rear Right) 2004-2004 Chevrolet Express 2500 V8 6.0L Upstream (Front Right);Downstream (Rear Right) 2004-2004 Chevrolet Express 2500 V8 6.0L Upstream (Front Right);Downstream (Rear Right) 2005-2007 Chevrolet Express 2500 V8 6.0L Upstream (Front Right);Downstream (Rear Right) 2005-2007 Chevrolet Express 3500 V8 4.8L Upstream (Front Right);Downstream (Rear Right) 2003-2003 Chevrolet Express 3500 V8 6.0L Upstream (Front Right);Downstream (Rear Right) 2004-2007 Chevrolet Express 3500 V8 6.0L Upstream (Front Right);Downstream (Rear Right) 2000-2004 Chevrolet Impala V6 3.4L Downstream (Rear) 2000-2003 Chevrolet Impala V6 3.8L Downstream (Rear) 2006-2007 Chevrolet Impala V8 5.3L Upstream (Front) 2008-2009 Chevrolet Impala V8 5.3L Upstream (Front);Downstream (Rear) 1996-2001 Chevrolet Lumina V6 3.1L Downstream (Rear) 1996-1997 Chevrolet Lumina V6 3.4L Downstream (Rear) 1998-1999 Chevrolet Lumina V6 3.8L Downstream (Rear) 1996-1996 Chevrolet Lumina APV V6 3.4L Downstream (Rear) 2004-2008 Chevrolet Lumina APV L4 2.2L Downstream (Rear) 1996-1999 Chevrolet Monte Carlo V6 3.1L Downstream (Rear) 1996-1997 Chevrolet Monte Carlo V6 3.4L Downstream (Rear) 2001-2004 Chevrolet Monte Carlo V6 3.4L Downstream (Rear) 1998-2003 Chevrolet Monte Carlo V6 3.8L Downstream (Rear) 2006-2007 Chevrolet Monte Carlo V8 5.3L Upstream (Front) 1997-2003 Chevrolet S10 Pickup L4 2.2L Downstream (Rear) 2007-2011 Chevrolet Silverado 1500 V6 4.3L Upstream (Front) 2006-2007 Chevrolet Silverado 1500 V8 4.8L Upstream (Front) 2006-2007 Chevrolet Silverado 1500 V8 5.3L Upstream (Front) 2006-2007 Chevrolet Silverado 1500 V8 5.3L Upstream (Front) 2006-2006 Chevrolet SSR V8 6.0L Downstream (Rear) 2006-2007 Chevrolet Suburban 1500 V8 5.3L Upstream (Front) 2007-2007 Chevrolet Suburban 1500 V8 5.3L Upstream (Front) 2007-2007 Chevrolet Suburban 1500 V8 6.0L Upstream (Front) 2007-2007 Chevrolet Suburban 2500 V8 6.0L Upstream (Front) 2006-2007 Chevrolet Tahoe V8 4.8L Upstream (Front) 2006-2007 Chevrolet Tahoe V8 5.3L Upstream (Front) 2006-2007 Chevrolet Tahoe V8 5.3L Upstream (Front) 2002-2005 Chevrolet Trailblazer L6 4.2L Downstream (Rear) 2006-2006 Chevrolet Trailblazer V8 5.3L Downstream (Rear) 2006-2006 Chevrolet Trailblazer V8 6.0L Downstream (Rear) 1997-2004 Chevrolet Venture V6 3.4L Downstream (Rear) 2004-2005 GMC Canyon L4 2.8L Downstream (Rear) 2004-2005 GMC Canyon L5 3.5L Downstream (Rear) 2009-2011 GMC Canyon V8 5.3L Upstream (Front) 2002-2005 GMC Envoy L6 4.2L Downstream (Rear) 2006-2006 GMC Envoy V8 5.3L Downstream (Rear) 2003-2003 GMC Savana 1500 V6 4.3L Upstream (Front Right);Downstream (Rear Right) 2004-2006 GMC Savana 1500 V6 4.3L Upstream (Front Right);Downstream (Rear Right) 2003-2003 GMC Savana 1500 V8 5.3L Upstream (Front Right);Downstream (Rear Right) 2004-2006 GMC Savana 1500 V8 5.3L Upstream (Front Right);Downstream (Rear Right) 2007-2007 GMC Savana 1500 V8 5.3L Upstream (Front Right);Downstream (Rear Right) 2003-2003 GMC Savana 2500 V6 4.3L Upstream (Front Right);Downstream (Rear Right) 2004-2005 GMC Savana 2500 V6 4.3L Upstream (Front Right);Downstream (Rear Right) 2003-2003 GMC Savana 2500 V8 4.8L Upstream (Front Right);Downstream (Rear Right) 2004-2007 GMC Savana 2500 V8 4.8L Upstream (Front Right);Downstream (Rear Right) 2003-2003 GMC Savana 2500 V8 5.3L Upstream (Front Right);Downstream (Rear Right) 2004-2005 GMC Savana 2500 V8 5.3L Upstream (Front Right);Downstream (Rear Right) 2003-2003 GMC Savana 2500 V8 6.0L Upstream (Front Right);Downstream (Rear Right) 2004-2004 GMC Savana 2500 V8 6.0L Upstream (Front Right);Downstream (Rear Right) 2004-2004 GMC Savana 2500 V8 6.0L Upstream (Front Right);Downstream (Rear Right) 2005-2007 GMC Savana 2500 V8 6.0L Upstream (Front Right);Downstream (Rear Right) 2005-2007 GMC Savana 3500 V8 4.8L Upstream (Front Right);Downstream (Rear Right) 2003-2003 GMC Savana 3500 V8 6.0L Upstream (Front Right);Downstream (Rear Right) 2004-2007 GMC Savana 3500 V8 6.0L Upstream (Front Right);Downstream (Rear Right) 2007-2013 GMC Sierra 1500 V6 4.3L Upstream (Front) 2006-2007 GMC Sierra 1500 V8 4.8L Upstream (Front) 2006-2007 GMC Sierra 1500 V8 5.3L Upstream (Front) 2006-2007 GMC Sierra 1500 V8 5.3L Upstream (Front) 1997-2003 GMC Sonoma Pickup L4 2.2L Downstream (Rear) 2006-2007 GMC Yukon V8 4.8L Upstream (Front) 2006-2007 GMC Yukon V8 5.3L Upstream (Front) 2006-2007 GMC Yukon V8 5.3L Upstream (Front) 2007-2007 GMC Yukon Denali V8 6.2L Upstream (Front) 2006-2007 GMC Yukon XL 1500 V8 5.3L Upstream (Front) 2007-2007 GMC Yukon XL 1500 V8 5.3L Upstream (Front) 2007-2007 GMC Yukon XL 1500 V8 6.0L Upstream (Front) 2007-2007 GMC Yukon XL 1500 V8 6.2L Upstream (Front) 2007-2007 GMC Yukon XL 2500 V8 6.0L Upstream (Front) 2007-2007 Hammer H2 V8 6.0L Upstream (Front) 2008-2009 Hammer H2 V8 6.2L Upstream (Front) 2008-2010 Hammer H3 V8 5.3L Upstream (Front) 2009-2010 Hammer H3T V8 5.3L Upstream (Front) 2003-2006 Isuzu Ascender L6 4.2L Downstream (Rear) 2006-2006 Isuzu Ascender V8 5.3L Downstream (Rear) 1997-2000 Isuzu Hombre L4 2.2L Downstream (Rear) 1996-1999 Oldsmobile 88 Downstream (Rear) 1996-1996 Oldsmobile 98 Downstream (Rear) 1996-1999 Oldsmobile Aurona V8 4.0L Downstream (Rear) 2002-2004 Oldsmobile Bravada L6 4.2L Downstream (Rear) 1996-1996 Oldsmobile Cutlass Ciera L4 2.2L Downstream (Rear) 1996-1996 Oldsmobile Cutlass Ciera V6 3.1L Downstream (Rear) 1996-1997 Oldsmobile Cutlass Supreme V6 3.1L Downstream (Rear) 1996-1996 Oldsmobile Cutlass Supreme V6 3.4L Downstream (Rear) 1999-1999 Oldsmobile Intrigue V6 3.5L Downstream (Rear) 1998-1999 Oldsmobile Intrigue V6 3.8L Downstream (Rear) 1996-1999 Oldsmobile LSS Downstream (Rear) 1997-1998 Oldsmobile Regency V6 3.8L Downstream (Rear) 1996-2004 Oldsmobile Silhouette V6 3.4L Downstream (Rear) 2001-2004 Pontiac Aztek V6 3.4L Downstream (Rear) 1996-2003 Pontiac Bonneville V6 3.8L Downstream (Rear) 1996-2002 Pontiac Firebird V6 3.8L Downstream (Rear) 1996-1997 Pontiac Firebird V8 5.7L Downstream (Rear) 1998-2002 Pontiac Firebird V8 5.7L Upstream (Front);Downstream (Rear) 1996-2003 Pontiac Grand Prix V6 3.1L Downstream (Rear) 1996-1996 Pontiac Grand Prix V6 3.4L Downstream (Rear) 1997-2003 Pontiac Grand Prix V6 3.8L Downstream (Rear) 2006-2007 Pontiac Grand Prix V8 5.3L Upstream (Front) 2008-2008 Pontiac Grand Prix V8 5.3L Upstream (Front);Downstream (Rear) 1999-2004 Pontiac Montana V6 3.4L Downstream (Rear) 2008-2009 Pontiac Torrent V6 3.6L Downstream (Rear) 1996-1998 Pontiac Trans Sport V6 3.4L Downstream (Rear) 2005-2005 Saab 9-7X L6 4.2L Downstream (Rear) 2006-2006 Saab 9-7X V8 5.3L Downstream (Rear) 2008-2008 Saturn VUE V6 3.6L Downstream (Rear) How do I know the O2 sensor is good or not? Check engine light on A reduction in fuel economy. Your catalytic converter fails unexpectedly Exhaust emissions reach undesirable levels. How to install the oxygen sensor? Step 1 - Some sensors are equipped with a heat shield that must be removed before the sensor removal, this is performed by removing any mounting bolts. Step 2 - By using a regular socket it minimizes potential damage to the sensor body and the threads, this technique helps avoid stripping the old sensor upon removal. Step 3 - Then, locate and disconnect the wiring connector, this step should be done before removing the sensor if the wiring is still attached. Step 4 - Its important that the wiring harness connectors are exactly the same, each sensor is unique to it's position and is located in the system by its connector configuration. (Note: some replacement sensors have a universal electrical connector that must be configured to the wiring of the old sensor.) Step 5 - Use a small wire brush to help clean the threaded port to ensure a proper seal of the new sensor. Gently install the new oxygen sensor by hand while keeping the wiring and connector free from bends. Step 6 - Gently tighten the sensor while keeping wiring free from damage, these sensors need to be fairly snug to avoid leakage. Step 7 - Once the sensor is tightened, reinstall any heat shields or bracing that had to be removed. Step 8 - After the heat shield has been reinstalled, mount the connector to it's holder and reattach the connector back onto the wiring harness. If the car has diagnostic trouble codes, they will need to be cleared. Returns and Exchanges Payment Warranty Customer Satisfaction Shipping Policy Returns and Exchanges 1.If you have any questions you may reach us via ebay message. 2.Please Do Not click "Return this item" in any situation as following picture shows. Because sometimes it will spend more time to resolve the issue for those items needn't to be returned for a replacement after fully communication. Click "Contact seller" via Ebay Message(protected by Ebay),that is the fastest way to solve any problem for you. 3.A Merchandise Authorization Number (RMA#) is required for all need returned packages (After we have a fully communication). Please contact us to get an ""RMA"" number before you ship your items back to us. Items returned without an ""RMA"" number would be ignored or delayed in processing. Returns/Exchanges will not be accepted unless authorization has been issued by our customer service. 4.All NON-Seller Mistake returns for refund are subject to 20% re-stocking fee and buyer should pay for the return shipping fee and handle fee.(For example,you brought wrong item or cancelled order after item was shipped). 5.All return products should be in brand new state with all accessories included. 6.Refunds will be given via paypal only. 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