AiYiGu Power Seat Switch 8-Way Driver Side for Chevy GMC Cadillac 1999–2007 — Direct-Fit 12-Pin Replacement

AiYiGu 8-way power seat switch is a direct-fit driver-side replacement that restores full electric seat adjustment for compatible Chevy, GMC, Cadillac and Hummer models from 1999–2007.

This replacement power seat control is built to match the original seat adjuster’s layout and electrical pin count so you can swap a failing driver-side switch and regain tilt, lumbar and fore-aft motion without modifying your vehicle. It is intended as a like-for-like replacement for OEM part numbers such as 12450166 and equivalents, and it fits a broad group of full-size GM trucks and SUVs produced around the turn of the century. Read the fitment notes carefully—this unit is specifically for the front left (driver) side and requires the exact two-button plus 12-pin connector pattern to operate correctly.

How do I confirm this switch fits my vehicle?

Before purchasing, compare the connector and button arrangement on your existing switch to the replacement: this AiYiGu unit uses two buttons and a 12-pin plug that mirror the OEM layout. Checking your vehicle’s year and model against the supported list helps avoid mismatches. If your vehicle has a different pin count or a passenger-side (right) switch, this product will not be compatible.

• Check your original part for two buttons and a 12-pin connector.
• Confirm vehicle compatibility: Chevy/GMC/Cadillac/Hummer 1999–2007 models listed.
• Use the vehicle fit tool or compare OEM number 12450166 when available.

What functions does the 8-way switch control?

The 8-way layout lets you operate multiple seat motions from a single control: forward/rear, up/down, tilt and lumbar or recline depending on the original seat’s actuators. This restores the electric freedom of adjustment that modern drivers expect without replacing the entire seat assembly. It does not change the seat’s installed motors—only the user interface that directs them.

• Fore-aft slide and seat height adjustments.
• Seat cushion tilt and back recline control.
• Lumbar or auxiliary adjustments when present on the original seat.

How difficult is installation and what should I prepare?

Installation is straightforward for anyone comfortable with basic interior disassembly and electrical connectors. The switch mounts into the factory bezel and plugs into the original wiring harness—no cutting or splicing required when the connector matches. For safety, disconnect the battery before unplugging the seat connector and follow any manufacturer recommendations for airbag/occupant-sensing systems.

• Tools: basic trim tools and possibly a screwdriver to remove the bezel.
• Prep: disconnect the negative battery terminal first.
• Fit: ensure the two-button +12-pin pattern matches your harness exactly.

What should I expect in terms of quality and warranty?

AiYiGu supplies this switch as a cost-effective OEM-style replacement; it is manufactured to match the original form and function rather than being an aftermarket performance upgrade. The product listing includes seller support—if the switch is defective or not functioning as expected, contact the seller for a solution. Because seat electronics are vehicle-specific, seller support can help verify fitment or advise on returns.

• OEM compatibility intent: direct replacement for part 12450166 and equivalents.
• Seller-backed support for fitment or functional issues.
• No vehicle modifications required when connector and button layout match.

Who is this for: This AiYiGu 8-way power seat switch is aimed at owners of late‑1990s to mid‑2000s GM full‑size pickups and SUVs—Chevrolet Silverado/2500/3500, Suburban, Tahoe, Avalanche, GMC Sierra/Yukon, Cadillac Escalade and Hummer H2—who need a driver-side electric seat control replacement. It’s ideal for DIY mechanics, restoration projects, and fleet maintenance teams seeking an affordable, direct swap for a worn or nonfunctional driver seat control. Verify left-side placement and the two-button/12-pin connector before ordering to ensure a correct, hassle-free installation.