Here's a breakdown of potential causes and why getting a second opinion is strongly advised:
Possible Reasons for the Airbag Light:
* Faulty Crash Sensor: These sensors detect impacts and trigger airbag deployment. A malfunctioning sensor can send a false signal, triggering the light. Replacing the *entire* module might be overkill if it's just a single sensor. A diagnostic scan should pinpoint the specific faulty sensor.
* Faulty Clock Spring: This spiral cable in the steering column connects the airbag system to the steering wheel. A broken wire within the clock spring is a common cause of airbag light issues. It's usually cheaper to repair/replace than an entire module.
* Faulty Airbag Control Module (ACM) or related module: This is the main computer controlling the airbag system. A malfunction here can indeed require replacement, but diagnostics are essential to confirm this is the *actual* problem. A simple software glitch might be fixable without a costly part replacement.
* Wiring Problems: Damaged, corroded, or loose wiring anywhere in the airbag system can cause false signals. This is often overlooked, but a thorough inspection is necessary.
* Low Battery Voltage: While less likely, a consistently low battery voltage can sometimes trigger the airbag light.
* Seat Belt Buckle Switch: Problems with this switch can sometimes cause issues within the system.
Why a Second Opinion is Crucial:
* Misdiagnosis: Dealers, while knowledgeable, can sometimes jump to conclusions, especially with complex systems like airbags. An independent mechanic specializing in automotive electrical systems might offer a more thorough and cost-effective diagnosis.
* Cost: Replacing modules is expensive. A second opinion can help identify cheaper fixes like replacing a single sensor or repairing wiring.
* Safety: Improper airbag repair can compromise your safety. You need a competent mechanic who understands the system's intricacies.
What You Should Do:
1. Get a Second Diagnostic Scan: Take your Bonneville to a reputable independent mechanic, preferably one specializing in electrical diagnostics, and request a complete scan of the airbag system. This should identify the *specific* fault code(s) triggering the light.
2. Compare Quotes: Get quotes from both the dealer and the independent mechanic, ensuring they specify the exact work being done and parts being replaced.
3. Ask Questions: Don't hesitate to ask detailed questions about the diagnosis and proposed repairs. A good mechanic will explain things clearly and justify their recommendations.
In short, while a faulty module *could* be the cause, it's highly recommended to get a second opinion and a more detailed diagnosis before authorizing any expensive repairs. Jumping straight to module replacement without proper troubleshooting could lead to unnecessary costs and potentially even unsafe repairs.
