JDMSPEED Ignition Lock Cylinder Starter Switch for GMC & Chevy 1967–1979 — 7‑Pin Alloy with 2 Keys

JDMSPEED 7-pin ignition lock cylinder starter switch with two keys is a direct-fit replacement for many classic GMC and Chevrolet vehicles (1967–1979) and select late‑1980s truck models, providing a reliable, plug-and-play dash ignition assembly.

This replacement ignition cylinder from JDMSPEED is built from a durable alloy and shipped with two matching keys. It’s designed to directly replace OEM part numbers such as 1116683, 1125, LS105, HPLS105, LS411 and US84, and it arrives factory-tested for fit and function so you can restore starting and steering-lock functions without extensive modification.

Which vehicles and part numbers does this ignition switch fit?

This cylinder is intended for a broad range of GM cars and trucks. It covers full-size Chevrolet and GMC models from 1967 through 1979 and many medium-duty trucks from the late 1980s.

• Classic car fitment: GMC & Chevy models 1967–1979.
• Late‑80s trucks: GMC B6000 (1988–1991), C6000 (1988–1990), C7000 (1988–1990), P2500 (1988–1989), P3500 (1988–1990), P4500 (1989–1990).
• Chevrolet truck fitment: B60 (1988–1991), C70 (1988–1990), P30 (1988–1990), P20 (1988–1989).
• Replaces part numbers: 1116683, 1125, LS105, HPLS105, LS411, US84.

How difficult is installation and what tools are needed?

The JDMSPEED cylinder is a plug-and-play direct replacement intended for in-dash installations; most mechanically competent DIYers can install it with common hand tools. If your original wiring and steering column are intact, no special programming is required because it uses traditional mechanical keys, not electronic immobilizers.

• Installation style: plug-and-play, direct replacement for compatible columns.
• Tools typically required: screwdriver set, socket wrench, steering column removal tools if needed.
• Time estimate: 30–90 minutes depending on vehicle access and experience.
• Note: Verify part number compatibility and wiring before starting removal.

What materials and quality checks does this ignition lock use?

The ignition lock cylinder is crafted from a high-quality alloy chosen for strength and wear resistance, then subjected to performance inspection at the factory. That construction aims to restore dependable mechanical function—turn, start and steering-lock—while resisting corrosion and wear from regular use.

• Construction: durable alloy housing and precision internal tumblers.
• Quality control: 100% inspection and functional performance testing before shipment.
• Keys included: two stamped mechanical keys to replace lost or worn originals.
• Finish: corrosion-resistant plating for longer service life.

Will this ignition cylinder work with aftermarket accessories or modern immobilizers?

This cylinder is a mechanical, non-electronic ignition lock designed to replace factory legacy switches and is compatible with vehicles that rely on traditional key-operated ignition systems. It will not provide modern transponder immobilizer functions; if your vehicle uses an electronic anti-theft system, additional adaptation may be required.

• Compatibility: made for vehicles using mechanical key ignition systems.
• No transponder: does not include electronic immobilizer or chip programming.
• Aftermarket accessories: works with standard ignition wiring for starting and accessory positions.
• Advice: consult a professional if your vehicle has factory anti-theft electronics.

Who is this for: This JDMSPEED ignition lock cylinder is aimed at classic Chevy and GMC owners restoring 1967–1979 cars or owners of specific late‑1980s medium‑duty Chevrolet and GMC trucks who need a reliable, direct replacement. It’s also useful for mechanics, restoration shops, and DIY enthusiasts seeking a rugged, tested mechanical ignition switch with two keys and straightforward, plug‑and‑play installation.

• Package includes: 1x 7-pin ignition lock cylinder starter switch, 2x keys.
• Direct replacements: Part numbers 1116683, 1125, LS105, HPLS105, LS411, US84.
• Fitment summary: GMC & Chevy 1967–1979 plus selected 1988–1991 truck models (see full list).
• Quality: high-quality alloy construction and 100% factory performance inspection.