{"product_id":"jb4-tuner-for-gmc-sierra-1500","title":"JB4 Plug-and-Play Piggyback ECU Tuning Box for GMC Sierra 1500 2.7L Turbo (2019 Onwards)","description":"\u003cp\u003eUnlock serious, safe performance from your 2019 onwards GMC Sierra 1500 2.7L Turbo with the JB4 plug and play tuner from Nforcd. This proven piggyback ECU upgrade works alongside the factory calibration to optimise boost, timing and fuelling for sharper response and reduced turbo lag, delivering gains of up to 85whp and 120wtq to the wheels on a stock truck without flashing.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003ePlug and play installation to two accessible engine bay sensors, discreet fitment with a rugged billet aluminium JB4 enclosure\u003c\/li\u003e\n  \u003cli\u003eCANbus OBDII integration for real-time tuning using ECU data including pedal and throttle position, timing, fuel trims, air fuel ratio, knock and gear\u003c\/li\u003e\n  \u003cli\u003ePreloaded maps for 91 octane, 93 octane, factory, Valet mode, E85 blends and unleaded race fuel, plus boost by gear for improved launches\u003c\/li\u003e\n  \u003cli\u003eRead and clear fault codes, view and log up to 40 engine parameters with the JB4 app\u003c\/li\u003e\n  \u003cli\u003eOptional Bluetooth smartphone connectivity via the JB4 PRO adapter for wireless map switching, data logging and free firmware updates\u003c\/li\u003e\n  \u003cli\u003eNot VIN locked, fully removable without trace, factory-like drivability and compatible with all driving modes including towing\u003c\/li\u003e\n  \u003cli\u003eMade in the USA with a 5-year warranty\u003c\/li\u003e\n  \u003cli\u003eFuel economy unchanged during normal driving, 91 octane or better recommended for performance gains\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eVehicle fitment: GMC Sierra 1500 2.7L Turbo, 2019 onwards.\u003c\/p\u003e\n\n\u003cp\u003eThe JB4 tuning box is a popular choice with Nforcd customers who want a reversible, aftermarket upgrade that offers more functionality and safety than basic performance chips. It delivers smooth, repeatable power with the convenience of map switching and comprehensive data logging, all while keeping the factory ECU untouched.\u003c\/p\u003e\n\n\u003cp\u003eNforcd can supply and fit this JB4 at our Warwickshire facility. If you would like professional installation, request a fitting quote via Sales@nforcd.com. Order today and transform the way your Sierra drives.\u003c\/p\u003e","brand":"Burger Motorsports","offers":[{"title":"Default Title","offer_id":55463259308417,"sku":"CT4V Harness with WHITE MAF","price":687.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/9465\/6700\/files\/JB4-tuner-tune-performance_ac7cce98-c212-48fe-a5ed-481e2bdcba43.jpg?v=1774347302","url":"https:\/\/www.nforcd.com\/products\/jb4-tuner-for-gmc-sierra-1500","provider":"Nforcd","version":"1.0","type":"link"}