The Genie 1258518GT SL Proportional Upgrade Kit, ANSI (GRC Symbol) is a genuine OEM kit designed for the Genie GRC-12 vertical mast lift. This kit enables the conversion of the machine's 2-speed lift system to proportional lift control, giving operators smoother, more precise lift movement. A software upgrade is required to complete this conversion and is available online or via USB flash drive — refer to document 504.1 for the USB flash drive option. This kit applies to GRC-12 units up to serial number GRC14-1999.
Key Features
- Genuine OEM Engineering — Sourced directly from Genie, this kit meets the exact dimensional and electrical standards required for the GRC-12 proportional lift conversion.
- Direct Conversion Fit — Purpose-built to upgrade the 2-speed lift system on eligible GRC-12 units to proportional lift control, with no guesswork on compatibility.
- Smoother Lift Control — Proportional lift control replaces the on/off behavior of a 2-speed system, allowing operators to make finer height adjustments and work with greater confidence at elevation.
- Serial Number Specific — Verified for GRC-12 units through serial number GRC14-1999; always cross-reference part number 1258518GT against your parts manual to confirm fitment for your unit.
- Software Upgrade Required — The required software update is available online or by USB flash drive (refer to document 504.1), ensuring the full conversion is completed correctly.
This kit converts the lift control system on the Genie GRC-12 from a 2-speed configuration to proportional lift operation. On a 2-speed system, the lift function operates at fixed speeds with no intermediate adjustment; proportional lift allows the operator to modulate speed continuously for more precise platform positioning. Without completing this upgrade correctly — including the required software update — the machine may not respond as expected, which can affect both accuracy and safe operation at height. Cross-reference part number 1258518GT against your GRC-12 parts manual and confirm your unit's serial number before ordering.
Part Details
| Part Number | 1258518GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | SL Proportional Upgrade Kit, ANSI (GRC Symbol) |
Compatibility & Fitment
| Name | Models |
|---|---|
| GRC-12 | GRC-12 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
