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In a 2003 Pontiac Bonneville, the heater fuses are typically located in the underhood fuse box and the interior fuse panel. The underhood fuse box is usually found near the battery, while the interior fuse panel is located beneath the dashboard on the driver's side. You can refer to the owner's manual for a detailed diagram and the specific fuse numbers related to the heater system. Always ensure the vehicle is turned off before checking or replacing fuses.

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1w ago

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