Upgrade your GM 2500/3500 series vehicle's internal wiring with the Fleece Performance Extension Harness. This harness is specifically designed for 01-19 GM 2500/3500 models equipped with the Allison LCT or GM 4T65-E transmissions. Crafted to ensure reliable connectivity, it features durable internal wire harness connectors and seals that maintain optimal electrical performance and protect against moisture and contaminants.Fleece Performance's precision manufacturing guarantees a seamless fit, enhancing your vehicle's engine component reliability. Whether you're a professional mechanic or an enthusiastic hobbyist, this extension harness delivers the quality and resilience necessary for demanding automotive environments. Experience smooth installation paired with the trusted durability that Fleece Performance parts are known for.Trust in a product built to meet the rigorous demands of performance tuning and engine modifications. This harness not only secures your wiring connections but also supports the overall integrity of your vehicle's electrical system, helping to keep your build running peak and powerful..

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