The Genie 1258343GT is a genuine OEM SL Proportional Upgrade Assembly designed for the GRC-12 vertical mast lift, converting the unit from 2-speed to proportional lift control. As a direct OEM kit sourced through Genie, this assembly is built to integrate with existing GRC-12 systems up to serial number GRC14-1999. Note that a software upgrade is required to complete the conversion and is available online or via USB flash drive — refer to manual section 504.1 for details.
Key Features
- Genuine OEM Components — Every part in this assembly meets Genie's exact dimensional and material specifications for the GRC-12 platform, ensuring correct fit without improvisation.
- 2-Speed to Proportional Lift Conversion — Upgrades lift control from a fixed 2-speed system to smooth proportional response, improving operator precision during lift and lowering operations.
- Confirmed GRC-12 Fitment — Engineered specifically for the Genie GRC-12 vertical mast lift up to serial number GRC14-1999; verify your serial number before ordering.
- Software Upgrade Required — The mechanical kit pairs with a required software update, available for download online or on USB flash drive via Genie service bulletin 504.1 — plan for both steps when scheduling the conversion.
- Operational Control Improvement — Proportional lift control allows finer lift positioning compared to two-speed switching, reducing abrupt motion and supporting more controlled load placement at height.
A proportional lift control system replaces stepped or fixed-speed lift switching with a continuously variable response, allowing the operator to modulate lift and lower speed in proportion to control input. On vertical mast lifts like the GRC-12, this translates to smoother, more precise positioning — particularly valuable when working in confined overhead spaces or placing materials with close tolerances. A machine still operating on a 2-speed system can exhibit abrupt motion at the transition points between speeds; this conversion kit, combined with the required software update, eliminates that stepped response and brings the unit up to proportional-control specification.
Part Details
| Part Number | 1258343GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | SL Proportional Upgrade Assembly, AUS, GRC |
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.
