Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
The cost to diagnose the P1585 GMC code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
With the key on or engine running, system voltage from 9-18v, the Powertrain Control Module (PCM) detects an improper voltage on the Cruise Control Inhibit driver circuit, condition met for at least 30 seconds.
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