If you’re not already aware, some newer Chevrolet Corvette models come equipped with a rather unique feature — a front leveling system — that technicians should familiarize themselves with should related service be necessary.
Known as Front Ride Height Control (FRHC), the system is designed to raise the front of the vehicle during low-speed driving situations to help avoid objects on the ground as well as to better navigate speed bumps and steep driveways, reducing the potential for damage to the spoiler.
The FRHC (RPO E60) system employs front shock absorbers with built-in, two-position lift actuators, as well as hoses, lines, DOT 4 brake fluid, a hydraulic fluid reservoir and an electro-hydraulic control unit.
Electrical components include:
- S86 Vehicle Stability Control System Switch
- Front Ride Height Leveling Subsystems – K218 Front Suspension Lifting/Leveling Hydraulic Power Pack Module, Fluid Reservoir, Front Ride Height Hydraulic Control Unit (HCU) and Front Ride Height Left/Right Front Actuator (includes displacement sensor)
- P16 Instrument Cluster K20 Engine Control Module K160 Brake System Control Module
The system is operated by the driver through a Lift/Lower Select Switch (shown below) that’s located on the Corvette’s center console.
Aside from increasing ground clearance when driving, the system comes in handy during a servicing event when driving the vehicle onto various hoists or floor jacks.
Speaking of service, should a Service Front Leveling System message appear in the Driver Information Center on 2020 Corvette models, accompanied by the DTC U3000 SYM49 (Control Module Internal Malfunction), reprogram the Front Suspension Lifting/Leveling Hydraulic Power Pack Module with the latest calibration. In addition, refer to K218 Front Suspension Lifting/Leveling Hydraulic Power Pack Module — Programming and Setup — in Service Information.
Note: If a Same Calibration/Software Warning appears on the Service Programming System (SPS) screen, select OK and then follow the instructions on the screen.