Exterior Liftgate Unlatch Switch Circuit Malfunction
Table of contents
B3618 GMC Possible Causes
- Faulty Exterior Liftgate Unlatch Switch
- Exterior Liftgate Unlatch Switch harness is open or shorted
- Exterior Liftgate Unlatch Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How do I fix code B3618 GMC?
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’s pins.
Cost of diagnosing the B3618 GMC code
The cost of diagnosing the B3618 GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B3618 GMC Description
The Body Control Module (BCM) supplies a signal to the liftgate window unlatch switch through the liftgate window unlatch signal circuit. When the liftgate window unlatch switch is pressed, the voltage within the signal circuit is pulled low and in response, the BCM will energize the liftgate window unlatch relay. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground in the liftgate window unlatch switch signal circuit for greater than 60 seconds.