JDMSPEED Ignition Lock Cylinder 7-Pin Starter Switch — Direct-Fit for GMC/Chevy 1967–1979 with 2 Keys, Alloy Durable

JDMSPEED's 7-pin ignition lock cylinder starter switch is a direct-fit replacement that restores key-start functionality for select GMC and Chevrolet trucks and vans, and includes two keys for immediate use.

If your classic GMC or Chevy (model years listed below) has a worn or non-functioning ignition cylinder, this JDMSPEED unit offers a plug-and-play swap using the included two keys. Built from a durable alloy and manufactured to replace common OEM part numbers, it’s designed for drivers and mechanics who need a reliable, simple repair without rekeying or complex wiring changes.

Which vehicles and part numbers does this ignition cylinder replace?

This assembly matches multiple legacy part numbers and fits a wide range of GMC and Chevrolet trucks and vans from late-1960s classics through various late-1980s/early-1990s medium-duty models. It’s intended as a direct replacement for worn original equipment.

• Replaces part numbers: 1116683, 1125, LS105, HPLS105, LS411, US84
• Classic fitment: GMC & Chevy models 1967–1979 (car and truck dashboards)
• Later medium-duty fitment: GMC B6000/C6000/C7000/P2500/P3500/P4500 (1988–1991) and Chevrolet B60/C70/P20/P30 (1988–1990)

How durable and reliable is the JDMSPEED ignition lock cylinder?

The lock cylinder is machined from high-quality alloy and undergoes factory inspection and performance testing to meet durability expectations. It’s built to withstand repeated use and the environmental stresses common in vehicle interiors.

• Alloy construction for strength and longevity
• 100% quality inspection and performance testing before shipping
• Designed to resist wear common in older, high-mileage steering columns

Is the unit easy to install, and does it require special tools or wiring changes?

Installation is intended to be straightforward: the JDMSPEED cylinder is a plug-and-play/direct replacement designed to swap into the original dash location. No rewiring or rekeying is required when used as a like-for-like replacement.

• Direct replacement for original dash ignition switch assemblies
• Includes two keys to start the vehicle immediately after install
• Basic hand tools are typically all that’s needed; professional installation optional for those unfamiliar with dash removal

What comes in the package and what should I check before ordering?

The product ships with the ignition lock cylinder/starter switch and two matching keys. Confirm your vehicle’s part number and year-range compatibility to ensure direct fitment before purchasing.

• Package contents: 1x 7-pin ignition lock cylinder starter switch and 2x keys
• Verify fitment against your vehicle’s year, model, and OEM part number list provided above
• If in doubt, compare the connector (7-pin) and physical mounting to your existing unit

Who is this for: This JDMSPEED ignition lock cylinder is ideal for classic GMC and Chevrolet owners restoring late-60s through 70s trucks who need an authentic-feeling, reliable key-start replacement, as well as fleet managers and technicians servicing late-1980s medium-duty trucks and vans requiring a compatible 7-pin replacement. Choose this unit when you want a durable, tested part that reinstates original ignition operation without complex modifications.