{"product_id":"yaopei-o2-oxygen-sensor-4-pack-for-chevrolet-gmc-v8-1996-2002-2-upstream-234-4012-2-downstream-234-4018","title":"YAOPEI O2 Oxygen Sensor 4-Pack for Chevrolet GMC V8 1996–2002 (2 upstream 234-4012 + 2 downstream 234-4018)","description":"\u003cp\u003e\u003cstrong\u003eYAOPEI 4-pack O2 oxygen sensors (2x 234-4012 upstream + 2x 234-4018 downstream) restore accurate exhaust sensing for select Chevrolet, GMC and Cadillac V8 applications from 1996–2002.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese four replacement oxygen sensors are designed to match multiple factory part numbers and fit a range of full-size trucks, vans and SUVs from Chevrolet, GMC and certain Cadillac Escalade years. The set includes two upstream (pre-catalyst) and two downstream (post-catalyst) sensors so you can refresh the whole bank of sensors in one service. Each sensor uses a stainless housing with anti-oxidant treatment and laser-welded construction intended to resist heat and corrosion.\u003c\/p\u003e\n\n\u003ch3\u003eWill these sensors fit my 1999–2002 Silverado or Sierra?\u003c\/h3\u003e\n\u003cp\u003eIf your vehicle is listed in the compatible years and models, the YAOPEI sensors are offered as direct replacements for the specified factory part numbers. Confirm year, make, model and engine before ordering, and compare the connector shape and pin layout to your existing sensor to avoid mismatch.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with 1999–2002 Silverado 1500 and GMC Sierra 1500\u003c\/li\u003e\n  \u003cli\u003eAlso fits 1999–2000 Silverado\/Sierra 2500 and many 1996–2002 full-size models\u003c\/li\u003e\n  \u003cli\u003eIncludes two upstream (234-4012 style) and two downstream (234-4018 style) sensors\u003c\/li\u003e\n  \u003cli\u003eCheck plug shape and interchange numbers (9617178, SG454, SG236, 13474) if unsure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow are these sensors built to withstand exhaust conditions?\u003c\/h3\u003e\n\u003cp\u003eThe sensors feature stainless steel housings with a dual laser-welded seam for a tight seal that resists moisture intrusion. An anti-oxidant coating reduces oxidation at high temperatures, and the sensing element is pre-tested to help ensure reliable operation out of the box.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDual laser welded stainless housing for improved sealing\u003c\/li\u003e\n  \u003cli\u003eAnti-oxidant coating for oxidation and heat resistance\u003c\/li\u003e\n  \u003cli\u003eFactory-style wiring and plug to match original connectors\u003c\/li\u003e\n  \u003cli\u003eEach sensor tested before packing to ensure function\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s included and how easy is installation?\u003c\/h3\u003e\n\u003cp\u003eThe package supplies four oxygen sensors: two front (upstream) and two rear (downstream). Installation is bolt-on with no modification required when the connector and thread type match your vehicle; basic hand tools and an oxygen sensor socket are typically all you need.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e4 PCS total: 2 upstream (234-4012) + 2 downstream (234-4018)\u003c\/li\u003e\n  \u003cli\u003eStraight bolt-on replacement—no cutting or splicing required\u003c\/li\u003e\n  \u003cli\u003eRecommended tools: oxygen sensor socket, ratchet, anti-seize (if desired)\u003c\/li\u003e\n  \u003cli\u003eInspect and compare plug photos to confirm fit before installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich vehicles and part numbers do these replace?\u003c\/h3\u003e\n\u003cp\u003eThis kit is built to interchange with several OE\/aftermarket numbers and is intended for late-1990s through early-2000s Chevrolet, GMC and some Cadillac V8 models. Use the listed interchange numbers to cross-check compatibility with your vehicle’s original sensor.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInterchange: 9617178, 234-4012, SG454 and SG236, 13474, 234-4018\u003c\/li\u003e\n  \u003cli\u003eFitment includes Avalanche, C\/K series, Express\/Savana vans, Tahoe, Suburban, Yukon and Escalade model years shown\u003c\/li\u003e\n  \u003cli\u003ePosition: 2 upstream (pre-cat) and 2 downstream (post-cat)\u003c\/li\u003e\n  \u003cli\u003eAlways verify by YEAR\/MAKE\/MODEL\/POSITION and connector photos\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The YAOPEI four-sensor kit is aimed at DIY mechanics and repair shops working on late-1990s to early-2000s GM full-size trucks, SUVs and vans that need a full-bank oxygen sensor refresh. It suits owners who want to replace all sensors at once for consistent sensing performance and who will verify connector type and part interchange before purchase. If you are unsure about fitment, compare the pictures and plug details or contact the seller for confirmation prior to installing.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these sensors replace OEM part numbers 234-4012 and 234-4018?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. This kit includes sensors that interchange with 234-4012 and 234-4018 and related OEM numbers listed; verify connector shape before buying.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these bolt-on replacements or do they require wiring modifications?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They are designed as straight bolt-on replacements when the plug and threads match; no wiring modifications needed.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"YAOPEI","offers":[{"title":"Default Title","offer_id":48080885743774,"sku":"B0B2QQPSDB","price":69.11,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/yaopei-front-packaging-view.jpg?v=1785791563","url":"https:\/\/northtrailauto.ca\/products\/yaopei-o2-oxygen-sensor-4-pack-for-chevrolet-gmc-v8-1996-2002-2-upstream-234-4012-2-downstream-234-4018","provider":"North Trail Auto","version":"1.0","type":"link"}