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Upgrade the electrical system of your classic Chevy or GMC truck with our premium American Autowire body and chassis wiring harnesses. Specifically designed for 1947-87 model trucks, these harnesses offer durability and precision while seamlessly integrating with our LS & LT wiring systems. Our classic update kits provide modern wiring solutions, ensuring that your truck's electrical components function flawlessly.
Whether you're restoring a 1947-55 model or enhancing a 1983-87 truck, our harnesses simplify the installation process and improve overall reliability and performance.
These harnesses ensure modern reliability and efficiency, maintaining optimal performance of all electrical components in your classic Chevy or GMC truck.
Yes, our harnesses are designed to be versatile and can be used in both restoration projects and custom truck builds.
Yes, our wiring harnesses are compatible with both OEM and aftermarket accessories, providing flexibility for various upgrades, as well as seamless integration with our LS & LT Standalone Wiring Harnesses.
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Looking for an Affordable, In Stock, Plug and Play wiring harness for your LS Swap? PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. These harnesses include the Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines. All PSI Harnesses are Made in the USA. In addition to wiring harnesses, PSI carries Holley Products, Vintage Air A/C, Dakota Digital Gauges, HPTuners and PCM programming, Fuel Pump Kits, Engine Sensors, Extension Harnesses, Replacement GM connector pigtails and a complete line of hardware to complete your conversion needs!
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Contacts
2029 Route 88
Brick, NJ 08724
ph. 732-276-8589 Mon-Fri: 8:00am to 6:00pm ET
customerservice@psiconversion.com
sales@psiconversion.com
techsupport@psiconversion.com