X4XZ Neutral Safety & Back-Up Lamp Switch 24229422 — 4L60E/4L80E Fit, Zinc-Coated

The X4XZ 24229422 Park Neutral Position Back-up Lamp Switch is a direct-fit neutral safety and reverse lamp switch designed to restore proper starting and backup-light operation on select GM trucks and SUVs.

This replacement part fits many General Motors vehicles equipped with 4L60E and 4L80E transmissions from the mid‑1990s through the early 2000s. Built with a corrosion-resistant zinc coating and engineered housings, the switch replaces OE reference numbers including 24229422, NS85T, D2263C and others to reliably control engine start-in-park/neutral and the transmission’s reverse lamp circuit.

Which vehicles will this switch fit?

The X4XZ switch covers a long list of Chevy, GMC and related GM-brand SUVs, trucks and vans produced roughly between 1994 and 2003. Compatibility depends on your vehicle’s transmission model (4L60E or 4L80E) and the presence of the matching hood guide bracket shown in the second product photo.

• Chevy models: Astro, Avalanche 2500, Blazer, C/K series pickups and Suburban, Corvette, Express vans, Silverado, Tahoe, Trailblazer.
• GMC models: C/K pickups and Suburban, Jimmy, Sierra, Savana vans, Yukon and Sonoma.
• Also fits some Cadillac Escalade (1999–2003), Hummer H2 (2003) and Oldsmobile Bravada (1996–2002) applications.

How does this switch affect starting and reverse lights?

This component performs two functions: it completes the starting circuit when the shifter is in Park or Neutral, and it energizes the back-up lamp circuit when the transmission is placed in Reverse. Replacing a worn or faulty unit restores those electrical paths and the related safety behaviours.

• Allows engine start only in Park or Neutral for proper safety interlock.
• Powers reverse lamps so other drivers and bystanders see when you back up.
• Prevents no-start conditions and intermittent reverse-light failures.

What are the build quality and installation notes?

The switch is manufactured with anti-oxidation zinc plating and durable materials to guard against corrosion and mechanical wear. It ships as a single unit without a printed manual; the design follows OE mounting points for a straightforward bolt-and-connector replacement on compatible vehicles.

• Zinc-coated housing resists rust and extends service life.
• Tested for durability and dimensional fit to match OE references listed below.
• Simple replacement: unplug electrical connector, unbolt old switch, install new unit, verify hood guide bracket compatibility from the second image.

Which OE and reference numbers does this replace?

If you’re cross-referencing parts, this X4XZ unit corresponds to many original equipment numbers so it’s easier to confirm fitment against your vehicle’s existing part. Use your current switch number or the visual bracket check to ensure compatibility.

• Common references: 24229422, NS85T, D2263C, 12450016, 352-3201, DR4033.
• Additional cross-refs: DR4029, NS85, 74410A, D74410A, 77947 and others printed in the product notes.
• Designed for 4L60E (1995–2003) and 4L80E (1994–2000) transmission applications.

Who is this for: The X4XZ 24229422 switch is intended for owners, mechanics and restoration projects needing a reliable, cost-effective replacement for failing neutral safety or reverse lamp switches on compatible GM transmissions. It’s aimed at DIY installers and professional shops that require an OE-referenced unit with corrosion-resistant construction and straightforward fitment — particularly for 1994–2003 Chevrolet, GMC and related GM models. If your vehicle exhibits no-start conditions in Park/Neutral or intermittent/reliable backup lamp operation, this switch is a practical replacement option. Contact seller support for fitment questions and after-sales help; one-year product coverage is offered for peace of mind.