How to Solve the Problem of Buick GL8 Anti-Theft Lock Causing Failure to Start?
3 Answers
Buick GL8 anti-theft lock causing failure to start can be resolved by: pressing the daily mileage reset button while pulling out the clock adjustment button on the combination instrument panel to reset the password. Taking the Buick GL8 2021 Land Business Class 652T Comfort model as an example: the manufacturer of this vehicle is SAIC General Motors Buick, classified as an MPV, with an energy type of gasoline. The dimensions of this car are 5238mm in length, 1878mm in width, and 1776mm in height, with a wheelbase of 3088mm. The body type is a 5-door, 7-seat MPV, equipped with a 9-speed automatic transmission, a top speed of 195 km/h, and a turbocharged intake form.
A few days ago, my GL8 also encountered an anti-theft lockout situation where it wouldn't start, which was really frustrating. I tried several methods: first, re-pairing the key by sitting in the driver's seat, closing the door, inserting the key, turning it to the ON position, waiting for more than 10 seconds, then removing it—repeating this operation three times can reset the anti-theft system. Second, checking the remote key battery; if it's dead, the signal can't be sent, which can also lock the car—just replace it with a new button battery. If these methods don't work, it might be a fault in the body control module, and you'll need to go to a 4S shop to use a specialized diagnostic tool to read the fault codes. Once, my car wouldn't start at a gas station, and it turned out to be a loose wiring connector causing the module to fail to receive the signal—just unplugging and re-plugging the connector a few times fixed it. Remember not to keep the key and phone together in daily use, as electromagnetic interference can easily cause the anti-theft system to malfunction.
Don't panic when encountering a GL8 anti-theft lockout. I've handled this situation twice myself. First, confirm if the anti-theft system is truly activated. If the red car lock icon on the dashboard keeps flashing when turning the key and the engine light doesn't come on, it's likely an anti-theft trigger. The most straightforward solution is to disconnect the negative battery terminal for 5 minutes to reset the vehicle's computer system—that's how I fixed it last time in a mall parking lot. If that doesn't work, consider the relay issue: open the small gray box under the hood, locate the anti-theft relay, pull it out, and reinsert it firmly. In emergencies, try the spare key—sometimes the main key's internal chip has poor contact, causing this issue. For older keys, disassemble them to check if the circuit board is corroded; cleaning the contacts with alcohol often helps. Remember to clearly explain the anti-theft lock type to the technician when repairing—the GL8 uses an engine electronic anti-theft system, and mistakes can make things worse.
