MECMO Trailer Brake Controller Wiring Adapter for 1999–2002 GM Trucks & SUVs — 3025-P Plug‑and‑Play Harness, Fits Time‑Delayed & P

The MECMO 3025-P is a plug-and-play trailer brake controller wiring adapter engineered to connect factory GM wiring to aftermarket electric brake controllers for select 1999–2002 Chevrolet, GMC and Cadillac models.

This adapter replaces complex splicing with a factory-style harness that plugs into your vehicle’s original connector on one end and the brake controller’s built-in port on the other. Built for compatibility with both time-delayed and proportional controllers, the harness preserves vehicle wiring integrity while saving installation time and reducing the chance of wiring errors or shorts.

Which GM vehicles will this wiring adapter fit?

The MECMO 3025-P is tailored to many late‑1990s and early‑2000s GM trucks and SUVs that use amber turn signal wiring. It covers select Chevrolet, GMC and Cadillac models from 1999 through 2002. Verify your vehicle’s connector style and model year before purchasing to ensure a match.

• Chevrolet: 1999–2002 Silverado 1500/2500, 2001–2002 Silverado HD models, 2000–2002 Tahoe & Suburban (amber turn signals), 2002 Avalanche
• GMC: 1999–2002 Sierra 1500/2500, 2001 Sierra HD lines, 2000–2002 Yukon XL, 2001–2002 Yukon and Yukon Denali (amber turn signals)
• Cadillac: 2002 Escalade

How does this adapter work with different brake controllers?

The harness features a factory-style vehicle plug on one end and a standardized brake-controller port on the other, allowing direct connection without cutting factory wires. It supports many popular time-delayed and proportional controllers from leading brands.

• Compatible time-delayed units: Draw-Tite Activator I/II/III and Tekonsha PowerTrac
• Compatible proportional units: Tekonsha Prodigy, P2, P3, Primus IQ and Voyager
• Designed for controllers that accept a rear-mounted wiring port for a secure, low-profile connection

What are the construction and durability features?

MECMO engineered the wiring adapter for corrosion resistance and reliable conductivity in towing conditions. Materials and assembly focus on long-term protection against moisture, abrasion and electrical failure.

• Pure copper terminals for strong electrical conductivity
• Durable PVC housing around connectors to prevent cracking and exposure
• Black nylon braided sleeve over the harness provides abrasion resistance and neat routing

Will using this adapter affect my vehicle’s factory wiring or warranty?

The adapter plugs into the factory connector without cutting or splicing, preserving the original wiring harness. Because it avoids permanent modifications, installation is reversible and minimizes risk to factory wiring when used as intended.

• No wire cutting required—plugs into original vehicle connector
• Reduces risk of wiring errors and short circuits associated with direct splices
• Installation is typically quick and reversible, maintaining factory harness integrity

Who this is for: The MECMO 3025-P wiring adapter is intended for owners of compatible 1999–2002 Chevrolet, GMC and Cadillac trucks and SUVs who want a safe, professional connection between their factory harness and an aftermarket electric brake controller. It's especially useful for DIY installers, tow-ready fleets, or anyone replacing or upgrading a brake controller who prefers a plug‑and‑play solution that protects factory wiring.