2018 Buick Enclave Reliability Report

Parking brake faults show up here too. The brake fails to release fully, drags hard enough to leave a rear brake hot, or will not engage at all. In one case a loose wire rubbed against the rear CV boot, shorted out, and damaged the ABS module. Auto stop can shut down the whole car while it is in Drive, followed by Service Transmission and Service Parking Brake messages. One driver reports a total power loss in highway traffic. Isolated reports mention flickering headlights, an airbag light, and locks cycling on their own.

The car slips into what feels like neutral, revs loudly, or brakes hard on its own at low speed while dash warnings flash. One car stopped dead after rolling over a metal road plate, and the owner suspects auto stop. Other reports describe catalytic converter welds breaking on both sides, the remote start firing from a fob in a pocket while the car sat in a closed garage, and forward collision, pedestrian, and lane departure alerts that never warn.

Power steering cuts out as the engine restarts after auto stop, so the wheel turns hard just as the driver pulls away or turns. In that report the car also shuts off at random, and the problem began around 60,000 miles. A separate complaint describes shaking, an engine warning, and power loss on a busy road. The oil level was low each time, and adding oil cleared the lights for a while. Both patterns create a loss-of-control risk in traffic.

Fuel vapor leaks. One car less than a year old gives off a strong gasoline smell, bad enough that the owner keeps it out of the attached garage. Another report traces a check engine light and code P0496 to an EVAP purge solenoid that does not seal, which a dealer repaired. Neither report mentions a fire.

The sunroof glass shatters suddenly while the car is moving, with a bang loud enough to sound like a gunshot. Both reports involve normal driving with no impact: one during a slow left turn at about 15 mph, the other on a highway with no overpass nearby. In one case the closed shade kept glass from falling into the cabin. In the other, the panel was left with a large hole.