{"product_id":"culmkari-fuel-injection-pressure-regulator-for-chevy-silverado-avalanche-1999-2003-with-vacuum-line-direct-fit-oe-replacement","title":"CULMKARI Fuel Injection Pressure Regulator for Chevy Silverado\/Avalanche 1999–2003 with Vacuum Line — Direct Fit, OE Replacement","description":"\u003cstrong\u003eCULMKARI Fuel Injection Pressure Regulator with vacuum line replaces OE numbers 17113556 and 89060418 for compatible GM trucks and SUVs.\u003c\/strong\u003e\n\n\u003cp\u003eThis precision-engineered pressure regulator controls fuel rail pressure to match engine demand and maintain proper fuel delivery across a range of GM V8 and V6 applications. Built as a direct replacement for worn or failing OEM regulators, the unit includes the vacuum line connection required for vehicles that use manifold pressure to modulate rail pressure. Installation restores proper fuel control without extensive modifications when the part numbers and vehicle fitment align.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles is this regulator compatible with?\u003c\/h3\u003e\n\u003cp\u003eThis regulator fits many late‑1990s and early‑2000s General Motors platforms. Compatibility spans Chevrolet trucks and vans, GMC Sierra and Savana models, Pontiac\/GMC-derived SUVs, and several luxury models under Buick and Cadillac, plus Isuzu.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eChevy Avalanche and Silverado models (selected 1999–2003 4.8L, 5.3L, 6.0L engines).\u003c\/li\u003e\n  \u003cli\u003eExpress and Savana full‑size vans across 1500\/2500\/3500 configurations.\u003c\/li\u003e\n  \u003cli\u003eBuick Rainier, Cadillac Escalade, H2, Envoy, and Isuzu Ascender specific 2002–2004 fits.\u003c\/li\u003e\n  \u003cli\u003eReplaces OEM part numbers including 17113556, 89060418, 12583236 and others.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this part affect engine performance and drivability?\u003c\/h3\u003e\n\u003cp\u003eBy maintaining consistent fuel rail pressure, the regulator helps the fuel injectors deliver the correct volume of fuel for given engine loads. That steadier fuel control supports smoother idle, improved throttle response, and more predictable running conditions when the rest of the fuel system is in good order.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStabilizes fuel rail pressure under varying loads and vacuum conditions.\u003c\/li\u003e\n  \u003cli\u003eHelps prevent lean or rich running caused by pressure fluctuations.\u003c\/li\u003e\n  \u003cli\u003eWorks with existing injectors and rail hardware—no recalibration needed for direct-fit models.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I check before replacing the pressure regulator?\u003c\/h3\u003e\n\u003cp\u003eConfirm the OE part number and the engine application match your vehicle. Inspect the vacuum line and fuel rail connections for damage, and ensure the fuel pump and fuel filter are functioning—pressure issues can have multiple causes beyond the regulator itself.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify original part numbers such as 17113556 or 89060418 match your old unit.\u003c\/li\u003e\n  \u003cli\u003eCheck vacuum hose integrity and sealing surfaces on the rail and regulator.\u003c\/li\u003e\n  \u003cli\u003eMeasure system pressure or have a technician confirm the fuel pump and filter are not the root cause.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs installation difficult and what tools are typically required?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward for experienced DIYers and professional technicians since this is a direct replacement unit. Expect basic hand tools, fuel-line safety precautions, and possibly a quick system bleed after replacement.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCommon tools: ratchet set, fuel-line disconnect tool (if applicable), torque wrench for specified fasteners.\u003c\/li\u003e\n  \u003cli\u003eSafety steps: relieve fuel system pressure before disconnecting lines and work in a well-ventilated area.\u003c\/li\u003e\n  \u003cli\u003eProfessional tech support available from the seller for fitment or installation questions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Drivers and mechanics restoring fuel system reliability on compatible GM trucks, vans, and SUVs who need a direct-fit replacement regulator with vacuum connection. It’s ideal for owners replacing a failed or leaking OEM regulator, fleet technicians maintaining older GM models, and enthusiasts performing engine repairs who require correct OE-equivalent fitment and part-number compatibility.\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: Does this regulator fit my 2003 Chevrolet Silverado 5.3L?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, this CULMKARI regulator is compatible with many 2003 Silverado 5.3L applications—confirm by matching your OEM part number (e.g., 17113556 or 89060418).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will I need additional parts to install it?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Most direct-fit installs require only basic hand tools and a good vacuum hose; replace damaged seals or lines if present for a proper repair.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"CULMKARI","offers":[{"title":"Default Title","offer_id":48084967227550,"sku":"B0DPH658K1","price":34.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/culmkari-fuel-injection-regulator-front-view.jpg?v=1785866115","url":"https:\/\/northtrailauto.ca\/products\/culmkari-fuel-injection-pressure-regulator-for-chevy-silverado-avalanche-1999-2003-with-vacuum-line-direct-fit-oe-replacement","provider":"North Trail Auto","version":"1.0","type":"link"}