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What is the reason for the Buick LaCrosse turn signal and audio not working?

2 Answers

PeytonDella

07/25/25 4:31am

The reason for the Buick LaCrosse turn signal and audio not working is a malfunction in the body control module (BCM). Dimensions: The LaCrosse is a mid-size 4-door 5-seater sedan under SAIC-GM-Buick, with length/width/height of 5000mm/1858mm/1497mm respectively, and a wheelbase of 2837mm. Powertrain: The 2012 LaCrosse 2.4T engine delivers maximum power of 137kW at 6200rpm, peak torque of 240Nm, with a top speed of 205km/h, paired with a 6-speed automatic transmission. Suspension: Equipped with 225/55R17 tires, featuring MacPherson strut front suspension and multi-link rear suspension.

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AnnaLynn

08/10/25 5:25pm

I've been driving my Buick Regal for almost ten years, and when both the turn signals and the audio system stop working at the same time, my first instinct is to check for a shared fuse issue. Buick's electronic systems often connect the audio and turn signals on the same circuit. The fuse box is located either under the steering wheel or in the engine compartment, and you can find the exact location by checking the manual. If the fuse is blown, replacing it will solve the problem. However, if it's not a fuse issue, it could be due to a faulty Body Control Module (BCM) sending incorrect signals, aging wiring harness causing a short circuit, or loose connector plugs. Once, my car had the same issue, and after a lot of troubleshooting, I found that the relay contacts were burned out, so I had to take it in for repairs. Non-functioning turn signals pose a significant risk when turning, and while the audio not working is a minor inconvenience, it's best not to ignore it. It's advisable to take the car to a 4S shop for a comprehensive inspection as soon as possible, using a diagnostic tool to identify any trouble codes and prevent the issue from escalating. During regular maintenance, have the technician check these areas to prevent problems before they occur—it saves a lot of hassle.

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