PIT66 3rd Brake Light for 1999–2007 Chevy Silverado & GMC Sierra — LED OEM‑fit

PIT66 LED third brake light designed to replace the high‑mount stop lamp on 1999–2007 Chevy Silverado and GMC Sierra 1500/2500/3500 (including HD and Classic models).

This PIT66 high‑mount stop lamp offers a direct OEM‑fit replacement for Silverado and Sierra trucks from model years 1999 through 2007, improving rear visibility and restoring a factory look. Built with a sealed housing and high‑output LEDs, the unit matches the original dimensions and electrical connections of popular reference part numbers 5978318 and 16525205 so installation stays straightforward for most owners.

Will this brake light fit my 1999–2007 Chevy or GMC truck?

Yes — the PIT66 unit is engineered to be compatible with Chevy Silverado and GMC Sierra 1500, 2500, 3500 and HD models from 1999 up to 2007, including Classic trims. It corresponds to common OE replacement reference numbers, so it’s intended as a direct swap for the factory high‑mount stop light.

• Fits: 1999–2006 Silverado & Sierra 1500/2500/3500 & HD models.
• Also fits: 2007 Silverado & Sierra 1500/2500/3500 Classic models.
• Matches reference parts: 5978318, 16525205 for alignment and electrical connection.

How does this third brake light improve safety and visibility?

The LED lamp produces brighter, faster‑responding illumination than many aged incandescent units, making your braking more noticeable to drivers behind you. The elevated mounting position and concentrated LED array help with recognition during day and night driving without altering your truck’s appearance.

• High‑output LEDs for clearer brake signaling.
• Faster illumination response compared with older bulbs.
• Maintains factory look while increasing rear visibility.

Is the PIT66 third brake light durable and weatherproof?

Yes — the housing uses a high‑density foam gasket and precise sealing to block out water, dirt and snow, protecting the LEDs and wiring. That weatherproof design reduces the risk of corrosion and premature failure in wet or icy conditions.

• Padded foam backer for full perimeter sealing.
• Sealed lens prevents moisture ingress and debris buildup.
• LEDs are less prone to filament failure than incandescent bulbs.

How difficult is installation and what’s included?

Installation is intended to be straightforward for owners familiar with trim removal and basic wiring; professional installation is recommended for those who prefer not to handle vehicle panels. The package contains a single LED third brake light assembled and ready to mount using existing fasteners and connectors on compatible trucks.

• Comes with 1 x LED third brake light unit in complete packaging.
• Plug‑and‑play electrical connector matches factory harness on compatible models.
• Some light trim removal may be required; professional help recommended if unsure.

Who is this for: Truck owners restoring or upgrading the high‑mount stop light on 1999–2007 Chevy Silverado or GMC Sierra models who want a durable, brighter LED replacement with OEM‑style fitment. It suits DIYers who can follow basic installation steps and service shops looking for a direct fit, reference‑number‑matched replacement part.