How to Reset the On-Board Computer of the LaCrosse?
2 Answers
LaCrosse on-board computer reset method: Remove the positive and negative terminals of the battery, reconnect the battery, turn the key to the 'on' position and then to the 'off' position, turn the key to the 'on' position again, and then start the engine to complete the reset. The on-board computer can display basic data such as instant fuel consumption, average fuel consumption, remaining fuel, driving range, engine speed, intake pressure, acceleration performance, and coolant temperature. The LaCrosse has a body length of 5026mm, width of 1866mm, height of 1462mm, and a 2905mm ultra-long wheelbase, providing a spacious and luxurious driving and riding space typical of a mid-to-large premium sedan, offering a comfortable and relaxed seating posture. The car features 29 practical storage spaces for conveniently storing commonly used devices, handbags, and other items.
I've worked in an auto repair shop for years and often have Buick LaCrosse owners asking about resetting the trip computer. Simply put, the most common method is to disconnect the battery for a few minutes to reset the system, essentially giving it a reboot. Here are the specific steps: First, turn off the engine, pop the hood, and locate the battery. Use a wrench to loosen the negative terminal (the black cap marked with a minus sign) and disconnect it completely. Wait about 10 to 15 minutes—this gives the computer enough time to clear its memory. Then, reattach and tighten the negative terminal securely. Finally, start the engine and let it run through its self-check. Most of the issues I've seen involve false error codes, like the check engine light coming on or transmission hiccups, which usually resolve after a manual reset. But don’t do this too often, or you might lose radio presets or clock settings. As for tools, just keep a wrench handy, wear gloves to avoid shocks, and if you're unsure, record a video and send it my way for a look.
