{"product_id":"gm-genuine-parts-manifold-absolute-pressure-map-sensor-25203477-oe-fit-altitude-validated","title":"GM GENUINE PARTS Manifold Absolute Pressure (MAP) Sensor 25203477 — OE Fit, Altitude‑Validated","description":"\u003cstrong\u003eGM Genuine Parts 25203477 is a factory‑validated Manifold Absolute Pressure (MAP) sensor that measures intake manifold pressure so the engine control module can set correct fuel delivery and ignition timing.\u003c\/strong\u003e\n\n\u003cp\u003eThis MAP sensor is an original-equipment component engineered by GM to meet the specifications used on Chevrolet, Buick, GMC, and Cadillac vehicles. It translates changes in manifold vacuum and atmospheric pressure into an electrical signal the engine control module uses alongside throttle position and other inputs. Built and tested to General Motors standards, this part supports consistent engine management across different altitudes and driving conditions.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the 25203477 MAP sensor influence engine performance?\u003c\/h3\u003e\n\u003cp\u003eThe sensor provides real-time pressure data that the engine control module interprets to adjust air\/fuel ratio and spark timing. Accurate readings help the vehicle respond smoothly to acceleration, load changes, and environmental shifts. Replacing a failing sensor restores predictable engine behavior and can prevent drivability issues.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDelivers intake manifold pressure signal to the engine control module\u003c\/li\u003e\n  \u003cli\u003eWorks with throttle position data for correct fuel metering\u003c\/li\u003e\n  \u003cli\u003eSupports consistent idle and throttle response\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this MAP sensor work at different elevations and climates?\u003c\/h3\u003e\n\u003cp\u003eYes. The 25203477 is designed and validated to account for atmospheric pressure changes, so it helps the engine compensate when you drive at higher or lower elevations. That calibration assists the engine management system in maintaining appropriate combustion across varied environments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEngineers validated performance across altitude ranges\u003c\/li\u003e\n  \u003cli\u003eHelps the ECM adjust fuel delivery for thin or dense air\u003c\/li\u003e\n  \u003cli\u003eReduces the need for frequent manual recalibration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I know when the MAP sensor needs replacing?\u003c\/h3\u003e\n\u003cp\u003eSymptoms of a degraded sensor include rough idle, inconsistent acceleration, poor fuel economy, or diagnostic trouble codes related to manifold pressure or air\/fuel control. A verified fault code and inspection typically confirm the MAP sensor as the issue. Installing this GM Genuine Parts unit restores the original equipment specification.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCheck engine light or related P0xxx\/P01xx codes\u003c\/li\u003e\n  \u003cli\u003eNoticeable drop in throttle responsiveness or economy\u003c\/li\u003e\n  \u003cli\u003eCompare sensor output to manufacturer specifications during diagnosis\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this part compare to aftermarket alternatives?\u003c\/h3\u003e\n\u003cp\u003eGM Genuine Parts are engineered and validated by General Motors to match the fit and function used on assembly lines, which can offer a closer match to original calibration than generic replacements. While some aftermarket parts may be less expensive, OE parts reduce the chance of fitment or signal inconsistencies that affect engine management.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOE design and validation tailored to GM vehicle systems\u003c\/li\u003e\n  \u003cli\u003eManufacturing updates and quality controls by GM engineers\u003c\/li\u003e\n  \u003cli\u003eOften direct fit with original connectors and mounting points\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Drivers and technicians who need a direct-fit, factory-validated MAP sensor for Chevrolet, Buick, GMC, or Cadillac models. This part suits owners restoring proper engine control after a sensor failure, service shops aiming for OE-quality replacements, and anyone who prefers parts produced or validated by General Motors to maintain original performance characteristics.\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: Is the 25203477 MAP sensor an original GM part?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It is a GM Genuine Parts unit designed or validated by General Motors to match original equipment specifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this sensor fix a rough idle or poor fuel economy?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replacing a faulty MAP sensor can resolve rough idle and fuel economy issues if diagnostics identify the sensor as the cause.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GM GENUINE PARTS","offers":[{"title":"Default Title","offer_id":48085559967902,"sku":"B0CDKR3BB3","price":38.11,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/gm-genuine-parts-25203477-front-view.jpg?v=1785873229","url":"https:\/\/northtrailauto.ca\/products\/gm-genuine-parts-manifold-absolute-pressure-map-sensor-25203477-oe-fit-altitude-validated","provider":"North Trail Auto","version":"1.0","type":"link"}