Is your big-block Chevy or GMC truck with the 8.1L Vortec engine running rough, having idle problems, or throwing a check engine light related to the throttle? This ISEYEC Electronic Throttle Body (ETB) might be the fix. This is a direct replacement part designed for 2003-2007 model year heavy-duty trucks including the Chevrolet Silverado 2500HD/3500, Suburban 2500, and the GMC Sierra 2500HD/3500, Yukon XL 2500 – all equipped with the massive 8.1L V8 engine. PLEASE NOTE: It also lists fitment for some 2005-2006 2500 models with the 5.3L and 4.8L – double-check your exact engine! It replaces OEM part numbers like 12570801, 12679526, and others. This unit is built with premium materials, and the manufacturer notes improvements to the internal gear for better durability and smoother operation, aiming to reduce noise and vibration. Important: After installing a new electronic throttle body, the vehicle's computer (ECU) often needs to perform a relearn or adaptation procedure. This is crucial for proper idle and throttle response. Ensure your battery voltage is good (above 11.5V) during this process. This is a critical component for engine management, so correct installation is key. Verify your vehicle details meticulously before buying, and consider professional installation if you're not comfortable with advanced automotive repair.
