Expert Support
🔧 Can't make it to our shop? No problem. Our parts are engineered to be installed by any trusted local mechanic — no specialty tools or factory training required. We stay booked 12+ months out on in-house builds, but you don't have to wait. Full builder support included — we're here to help you and your mechanic get it done right.
Description
🔧 Custom built to order. Allow 10–15 business days for production before shipping.
⚡ Take the Guesswork Out of Your Gen V Wiring
The Wicked Wrench Pro-Series Standalone Wiring Harness is the ultimate integration solution for 2014–2026 GM Gen V LT-based engine swaps. Fully engineered, built, and tested in the USA, this premium TXL-wire harness delivers seamless, factory-level functionality to your classic truck, Jeep, or hot rod build.
⭐⭐⭐⭐⭐ What Builders Are Saying
"They promptly shipped my parts. Incredibly knowledgeable and willing to assist. Great people."
— David S. ✅ Verified Customer
"Knowledge on all gen 5 and square body conversion. Helped me with the set up I need for my 81 Jimmy."
— Midtown Roofing ⭐⭐⭐⭐⭐ Verified Customer
"Was a huge help! I'm building a massive 30+ inch lifted SAS truck. Always answered my questions and had some parts laying around he helped me with. Really great guy and huge help."
— DustAllDay ⭐⭐⭐⭐⭐ Verified Customer
🔧 Transmission Options & Pricing
- Manual Transmission ($1,300): Optimized base standalone harness configuration. (Note: Manual setups do not require or include the CAN Bus module).
- 6L80 / 8L90 Automatic ($1,600): Premium automatic setup. Includes our integrated Advanced CAN Bus Module for factory-level electronic shifting and safety interlocks. (Note: Gen 2 8L90s are not supported—Call us and we can go over your options).
- 10-Speed Automatic ($1,800): The ultimate drivetrain setup. Includes full Gen 2 10-speed transmission integration and our advanced CAN Bus module for flawless performance mapping.
💳 Build now and pay later. Select Shop Pay at checkout to split your standalone harness into low monthly installments.
🧠 Advanced CAN Bus Module Functions
(Included with 6L80, 8L90, and 10-Speed Automatic configurations)
Our integrated CAN Bus system mimics a brand-new factory Silverado, unlocking the maximum functionality you need from your modern drivetrain:
- PWM Alternator Control: Actively manages voltage to completely eliminate modern GM charging issues.
- Tap Shift Capability: Enables full manual shifting control for absolute burnout glory.
- Smart A/C Safety: Built-in automatic safety cutoffs based on real-time RPM, TPS, and AC pressure.
- Tow/Haul Mode: Retains factory shift patterns and maximum utility for heavy towing applications.
- Safety Interlocks: Integrated Park-Neutral safety start control keeps your custom ride safe.
- Signal Outputs: Pre-wired 12V RPM output (2 pulses per revolution) and VSS output (4,000 pulses per mile) to run your aftermarket gauges, plus integrated reverse signals for backup lights and cameras.
📝 Product Details & Compatibility
- Engine Support: Optimally mapped for LT1, LT4, L83, L86, L8T, and L8P engine setups. (Please call before purchasing for L82, L84, or L87 builds to confirm exact setup support).
- Premium Construction: Assembled using high-grade, heavy-duty TXL automotive wire. Features a clean, pre-wired weather-pack style fuse block with a clearly marked fuse legend.
- Cruise Control Add-on Available: Looking to add cruise control? Velocity Cruise Commander for Drive by Wire (DBW) Throttle Bodies VCM 100 Series Control Module add-on featuring a classic 1980s GM column stalk or dash-mount buttons.
- Lead Time: Custom built to order with a strict 10 to 15 business day production time before shipping.
🛑 Crucial Order Information
Because every harness is a highly complex component built specifically around your exact rig's specifications:
- Personal Build Review Call Included: Every order includes a personal build review call with our team before production begins — so your harness is built exactly right the first time. You MUST provide a valid, active phone number at checkout.
- Our Build Policy: Because your harness is built from scratch to your exact specifications, we're unable to accept returns or cancellations once production begins. This is why we do the build review call first — to make sure everything is perfect before we cut a single wire.
-
⚠️ Critical 10-Speed Electronic Compatibility Warning
If you are configuring your build with a GM 10-Speed Automatic Transmission, you must verify your engine's fuel system sensor configuration before installation:
- The 3-Wire Requirement: The 10-speed transmission electronics MUST receive data from a 3-wire Gen V engine setup.
- The 4-Wire Conflict: If your donor engine uses a 4-wire setup, the vehicle may start and run, but the 10-speed transmission will either fail to operate entirely or experience severe, unpredictable shifting malfunctions due to data mismatch.
- The Fix: If you have a 4-wire donor engine, you must swap out the fuel pressure sensor and the sub-harness located directly underneath the intake manifold to a factory GM 3-wire configuration before firing up the vehicle.