{"product_id":"oil-pump-gmt400","title":"Oil Pump - TBI - GMT400","description":"\u003cp\u003eOil pump for the 1988 to 1995 Chevrolet and GMC C\/K (GMT400) with the 4.3, 5.0 or 5.7 TBI V8.\u003c\/p\u003e\u003ch3\u003ePart numbers\u003c\/h3\u003e\u003cp\u003eMelling M55, standard volume (M55HV available as a high volume option). Cross-references to Mahle Clevite 6011057, Sealed Power 224-4146, and Elgin EM-55. No confirmed GM OEM number yet.\u003c\/p\u003e\u003ch3\u003eFits\u003c\/h3\u003e\u003cp\u003e1988 to 1995 TBI V8 only. The 1996 to 1998 Vortec engines use a different pump, not this one, check your engine before ordering.\u003c\/p\u003e\u003ch3\u003eWhy it matters\u003c\/h3\u003e\u003cp\u003ePump wear shows up as low oil pressure, particularly at idle once the engine's hot, and high mileage combined with the running temperatures here brings that wear forward. Worth checking oil pressure before assuming it's the gauge or sender at fault.\u003c\/p\u003e\u003ch3\u003eWhat you get\u003c\/h3\u003e\u003cp\u003eOne oil pump, standard volume. Brand Melling.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eNot sure it's right for your truck? Send us your VIN and we'll confirm before you order.\u003c\/em\u003e\u003c\/p\u003e","brand":"Melling","offers":[{"title":"Default Title","offer_id":49756209512698,"sku":"OBSAE-GMT4-00033","price":789.0,"currency_code":"AED","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/5131\/8266\/files\/Screenshot2026-07-26203430.png?v=1785083704","url":"https:\/\/obscureparts.com\/products\/oil-pump-gmt400","provider":"Obscure Parts","version":"1.0","type":"link"}