Complete LS Standalone Wiring Harness for 1999-2006 GM Vortec Engines - 4.8 5.3 6.0

Product Description This LS swap wire harness kit is designed specifically for 4.8, 5.3, and 6.0 GM Vortec engines from 1999 to 2006 with EV1 fuel injector connectors, as well as 4L60E or 4L80E transmissions with an adapter. The kit includes all necessary engine and transmission sensor connectors, as well as dash connections for speedometer, tachometer, park neutral, malfunction indicator, TCC, and a DLC port. Specification - Brand: ZZCSZ - Condition: Brand New - Injector Type: EV1 - Compatible with: GM Vortec engines from 1999 to 2006 with Drive by Cable throttle body and 4L60E or 4L80E (with adapter) transmissions. Package includes: - 1 * English Manual - 1 * Wiring Harness Kit - 2 * Mounting Screws Tools Required: - Terminal Crimping Tool - Wire Strippers - Electric Drill - 2" Hole Saw (for rubber grommet on the firewall) Installation Notes: 1. Never disconnect the battery while the ignition is on. 2. Avoid shorting any wires in the harness to ground, except for ground wires, as this can cause damage to the PCM. 3. A Multi-meter with a minimum of 10-Mohm resistance is required for testing circuits. Do not back probe wires to prevent permanent damage.

Installation Requirements: - Remove VATS from the PCM for Vortec engines. - Vortec harness uses sensors before and after the catalytic converter, with the rear O2 sensors not being used. - EGR, Air Pump, and CCP features are not necessary for engine operation. - Proper wiring of the brake switch is essential for TCC function when using 4L60E or 4L80E transmissions.

Caution: Improper wiring of the brake switch can lead to torque converter issues. Professional installation is recommended as this harness is not universal. Ensure compatibility before purchase.

A COMPLETE WIRING HARNESS KIT: - Includes all necessary connectors for engine and transmission sensors, as well as dash connections. COMPATIBLE WITH THESE ENGINES: - Designed for GM Vortec engines from 1999 to 2006 with Drive by Cable throttle body and 4L6OE or 4L80E transmissions. COMES WITH DETAILED INSTRUCTIONS: - Mount under the dash or in the kick panel on the right side of the vehicle. Includes a complete installation instruction packet. PROFESSIONAL INSTALLATION IS HIGHLY RECOMMENDED: - Proper grounding is crucial for harness operation. This product comes with a 12-month warranty for worry-free shopping. SHOP WITH CONFIDENCE: - Non-genuine aftermarket part from ZZCSZ with a warranty. Feel free to contact us with any questions.

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