{"product_id":"standalone-efi-wiring-harness","title":"Standalone EFI Wiring Harness","description":"The PSI Conversion HAR-G3WA is a standalone wiring harness engineered for retrofitting 2003-2007 Chevrolet, GMC, Cadillac, and Hummer 4.8L, 5.3L, 6.0L, and 5.7L Vortec engines into street rods, muscle cars, or non-emissions controlled vehicles. This harness is specifically designed for drive-by-wire configurations and supports 4L60E, 4L65E, and 4L80E automatic transmissions, providing a simplified solution for complex engine swaps.\n\nIt is designed to allow the PCM to be mounted inside the vehicle, typically in the glove compartment area, with approximately 4.5 feet of length provided from the rear of the cylinder head.\n\nInstallation requires basic four-wire hookups for switched power, constant power, and ground connections. Note that all harnesses require PCM VATs removal, which is available through PSI. If opting for the E85 flex-fuel signal wire, custom tuning is required. Additional functionality can be integrated through optional upgrades, such as 4WD signal wires for adjusting shift points in low-range, and cruise control support. Proper operation relies on the use of a compatible green\/blue 242 PCM, and fan relay kits (KIT-1010) are sold separately.","brand":"PSI Conversion","offers":[{"title":"Default Title","offer_id":52663381623096,"sku":"HAR-G3WA","price":579.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687530527.jpg?v=1784326411","url":"https:\/\/store.motormia.co\/products\/standalone-efi-wiring-harness","provider":"MOTORMIA","version":"1.0","type":"link"}