LS3 Swap Wiring Harness

The Sikky Stage 3 Package, featuring a wiring harness from Wiring Specialties, aims to provide a near-complete solution for LS3 engine swaps. The wiring harness is protected by fireproof fiberglass sleeving in high-temperature areas, rated up to 450°C (845°F), and utilizes high-temp TXL wire and nylon loom for durability in temperatures ranging from -40°C to +125°C (-40°F to +257°F). The Stage 3 Package includes several key components: a high-capacity, deep-sump aluminum race oil pan designed for optimal ground clearance and fitment around the front subframe; CNC-designed engine mounts with urethane bushings for vibration isolation; and a transmission mount specifically built for the T56, T56 Magnum, and TR6060 transmissions, both backed by a lifetime warranty. The package also features 100% stainless steel headers with 1 7/8” primaries and 3” collectors, equipped with V-band flanges. This kit is highly customizable through various selectable options, including intake manifold type, oxygen sensor compatibility, oil pressure sensor type, alternator selection, engine start setup (key or push button), fuel pump setup, pedal options, transmission type, AC add-on, and ABS functionality. It is important to note that the PCM configuration is specific to the build, and a correct tune/OS is required; customers can either purchase a PCM from Wiring Specialties or use their own if they are an expert GM tuner. The lead time for these custom-built harnesses is typically 2-8 weeks, with potential for longer wait times depending on specifications. Compatibility with specific engine and vehicle configurations, such as 6.2L 2007-2013 Cadillac Escalade, 6.2L 2008-2013 Chevrolet Silverado/GMC (Truck/Van), and 6.0L 2007-2014 Chevrolet/GMC (Truck/SUV), is selectable.