The P0576 code on your 2022 GMC Terrain indicates a low voltage condition in the cruise control input circuit. This suggests a short to ground affecting cruise control switch signals.
Low Input Analysis
A low voltage reading from the cruise control circuit typically indicates the signal is being pulled to ground. This could affect specific switch functions or the entire cruise control input depending on where the short exists.
Terrain Cruise Control System
The 2022 GMC Terrain features standard cruise control with steering wheel-mounted buttons. These switches connect through the clock spring to the body control module and cruise control system.
Causes of Low Circuit
Internal switch short creates constant low signal. Wiring insulation damage allows ground contact. Clock spring damage creates unintended shorts. Connector corrosion with moisture creates ground paths. Aftermarket installations may have damaged wiring.
Diagnostic Steps
Use GM GDS2 to monitor cruise control input voltage. Check if voltage is stuck low or changes with button presses. Disconnect the switch assembly to isolate the short. Test wiring for shorts to ground using an ohmmeter. Inspect the clock spring area for damage.