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Transmission Wiring for 2015-2020 Silverado 2.7L 5.3L 6.2L 8L90 8L45
$49.99$75.0033% off
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PRODUCT DESCRIPTION
Premium 8-Speed Transmission Wiring Harness (Silverado & Sierra 8L90 / 8L45)
Is your Silverado or Sierra suffering from harsh shifts, getting stuck in limp mode, or throwing TCM communication codes? A degraded internal wiring harness is one of the most common culprits in GM's 8-speed automatics.
Restore crisp, reliable shifting to your 2.7L, 5.3L, or 6.2L truck with this premium direct-replacement transmission wiring harness. Built to outlast the factory unit, it features high-purity copper wiring wrapped in industrial-grade rubber insulation to survive extreme transmission fluid temperatures. We even include the required auxiliary installation tool right in the box to help you or your mechanic get the job done efficiently.
⚠️ CRITICAL FITMENT WARNING - PLEASE READ:
General Motors utilized multiple transmissions (6, 8, and 10-speed) in the modern Silverado and Sierra platforms. This harness is strictly for 8L45 and 8L90 8-Speed Automatic Transmissions ONLY. Please verify your RPO code and match your original part number before purchasing.
Key Benefits
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Fixes Hard Shifting & Limp Mode: Resolves common electrical shorts and solenoid communication errors caused by degraded factory TCM wiring.
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Heavy-Duty Insulation: Upgraded rubber insulation protects the high-purity copper wiring from extreme heat and corrosive transmission fluid.
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Direct Factory Replacement: Engineered to exact OEM dimensions for a perfect plug-and-play fit inside your valve body.
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Installation Tool Included: Comes with a specialized auxiliary guide tool to ensure the harness is routed and seated correctly without damaging the pins.
Technical Specifications
| Feature | Specification |
| Transmission Type | 8L45 / 8L90 (8-Speed Automatic) |
| Material | Industrial Rubber & High-Purity Copper |
| Fitment Type | Direct OE Replacement |
| Package Includes | 1x Wiring Harness, 1x Auxiliary Installation Tool |
OEM Interchange Part Numbers
Replaces Original Equipment (OE) Parts: 24298757, 24046895, 2429-8757
Vehicle Fitment Guide
Designed exclusively for the following GM platforms equipped with the 8-Speed Automatic Transmission.
Chevy & GMC Trucks (Primary Fitment)
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Chevy Silverado 1500 (2.7L, 5.3L, 6.2L): 2015–2020
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GMC Sierra 1500 (2.7L, 5.3L, 6.2L): 2015–2020
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Chevy Colorado (2.8L, 3.6L): 2017–2020
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GMC Canyon (2.8L, 3.6L): 2017–2020
SUVs & Vans
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Cadillac Escalade / Escalade ESV (6.2L): 2015–2017
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GMC Yukon (6.2L): 2015–2017
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Chevy Express 2500 / 3500 (2.8L, 4.3L): 2017–2019
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GMC Savana 2500 / 3500 (2.8L, 4.3L): 2017–2019
Performance & Passenger Cars
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Chevy Camaro (2.0L, 3.6L, 6.2L): 2016–2020
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Chevy Corvette (6.2L): 2015–2019
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Cadillac ATS (2.0L, 2.5L, 3.6L): 2016–2019
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Cadillac CTS (2.0L, 3.6L): 2016–2019
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Cadillac CT6 (2.0L, 3.0L, 3.6L): 2016–2018