- 1). Park your Grand Prix and turn off the engine. Pull the hood release handle located inside the vehicle under the instrument panel. Push the hood latch located under the hood.
- 2). Determine whether you have a maintenance-free battery or a low-maintenance battery. While the maintenance-free battery is sealed, the low-maintenance battery contains six individual cells with vent caps.
- 3). Check the maintenance-free battery using its built-in hydrometer. The readings vary with the manufacturer, but typically a green eye means that the battery is properly charged with plenty of fluid. A black eye means that the battery is low in charge and low in electrolyte fluid. A yellow eye means that the electrolyte level and charge are low and you'll need to replace your maintenance-free battery.
- 4). Remove the vent caps to check the battery electrolyte levels on the low-maintenance battery. You'll find an indicator line on the side of each of the six cells, and you should check each cell individually. If the fluid isn't up to the indicator line, add distilled water to that cell.