First, you need to determine if your truck actually has a cabin air filter. Check your owner's manual. If it doesn't mention a cabin air filter, or if the manual is unavailable, your best bet is to visually inspect the area under the glove box or behind the glove box.
If your truck *does* have a cabin air filter, here's a general approach:
1. Locate the filter: The most common location is behind the glove box (passenger side). You'll likely need to remove the glove box entirely or at least partially.
2. Remove the glove box: This usually involves:
* Removing the screws holding the glove box in place. These are often found on the sides and possibly the top. There may also be clips.
* Carefully pulling the glove box down and away from the dashboard. Be gentle to avoid breaking any clips.
3. Access the filter: Once the glove box is removed or partially swung down, you should see the cabin air filter housing. It might be a simple plastic box with a cover or a more integrated part of the dashboard.
4. Remove the filter housing cover: This may involve releasing clips, removing screws, or simply pulling a cover off.
5. Remove the old filter: The filter will usually slide out. It's rectangular and may be wrapped in paper or cardboard.
6. Install the new filter: Ensure the new filter is oriented correctly (often indicated by an arrow on the filter). Slide it into the housing.
7. Reassemble everything: Put the filter housing cover back on, then replace the glove box and secure it with the screws and clips.
If you can't find the filter after removing the glove box: Your truck likely doesn't have a factory-installed cabin air filter. Aftermarket kits are available, but they require some modification to install.
Important Considerations:
* Take pictures: Before you start, take pictures of the glove box removal and the filter housing. This will help you during reassembly.
* Be gentle: Avoid using excessive force. If something doesn't come apart easily, double-check that you've loosened all the screws and released all clips.
* Consult a repair manual: A repair manual specific to your 1997 Dodge Ram model will provide the most accurate and detailed instructions.
If you're uncomfortable performing this task yourself, it's best to take your truck to a qualified mechanic.
