Experiencing issues with your van’s locks and key fob? You’re not alone. Many van owners, especially those with older models or conversion vans, encounter challenges with their locking systems. A crucial first step in diagnosing and resolving these problems involves understanding the information hidden in plain sight on your van – specifically, the sticker inside your passenger door. This sticker, containing a series of codes, can unlock valuable insights into your van’s original features, including its key fob compatibility. Let’s delve into how to use these “lock and unlock stickers” – or rather, the RPO code sticker – to troubleshoot and potentially solve your key fob and lock issues.
The key to understanding your van’s factory-installed options, including remote keyless entry, often lies in deciphering its Regular Production Option (RPO) codes. These codes are typically printed on a sticker located on the inside of your passenger side door. One RPO code, in particular, “AU0,” is significant when it comes to key fobs. If you find “AU0” listed on your van’s RPO sticker, it generally indicates that your van was originally equipped with remote keyless entry from the factory. This is good news because it means your van is likely designed to work with a key fob remote. If “AU0” is present, you can often order a compatible key fob and potentially program it to your van without needing to install additional hardware.
However, the situation can be a bit more complex, especially with conversion vans. Conversion van companies often started with base model vans, sometimes opting for the most basic options to keep costs down. While your RPO sticker might reflect these basic factory options, conversion companies often added their own aftermarket features and upgrades. This means even if your RPO sticker doesn’t show “AU0,” your conversion van might still have a remote lock/unlock system installed by the conversion company. In such cases, you might need to identify the specific aftermarket system to determine the correct type of key fob required. It’s possible a standard GM key fob won’t be compatible, and you may need a specialized key fob designed for the aftermarket system installed in your van.
Regardless of whether your van is a standard model or a conversion van, and whether or not you find “AU0” on your RPO sticker, you might be facing issues with your keys and locks simply due to age and wear. It’s common for older vehicles to develop sticky or non-functional locks. You might find that you have multiple keys, some of which seem to work in the ignition but not in the doors, or vice versa. The original article mentions a scenario with three GM keys, where even a smaller “trunk-looking” key started the van and opened all locks. Discrepancies like these can arise over time due to lock cylinder replacements or wear and tear.
One frequently overlooked solution for stiff or non-working locks is simple cleaning and lubrication. Over time, dirt, grime, and old lubricant can accumulate inside lock cylinders, causing them to become difficult to operate. Before assuming you need new keys or expensive repairs, try cleaning your van’s locks. A recommended method involves using penetrating lubricants like WD-40 or a parts blaster. Spray the lubricant into the keyholes and gently wiggle the key in and out. Avoid forcing the key to turn initially. Wipe off the key frequently to remove the gunk and repeat the process multiple times, potentially over a few days or weeks. Patience is key here. Gradually, the lubricant will help to dissolve the buildup inside the lock cylinder. After cleaning with a penetrating lubricant, applying a longer-lasting lubricant like white lithium grease can help keep the locks operating smoothly.
If cleaning the locks doesn’t resolve your key issues, or if you suspect you have mismatched keys or a replaced lock cylinder, another option worth considering is obtaining a new key based on your van’s Vehicle Identification Number (VIN). A key cut from your VIN should, in theory, work with the original door locks and ignition. While it might not solve issues with replaced rear hatch or ignition locks, it’s a relatively affordable way to ensure you have a key that works with the original door locks.
To further diagnose your lock and key issues, consider these questions: Do your keys wiggle at all in the locks, or are they completely stuck? Can you open the doors from the inside? What do the locks sound and feel like when you attempt to use the key? Have you actually tried using a key in the rear hatch lock? Sometimes, the issue might be as simple as not realizing a key already works in a particular lock.
In conclusion, understanding your van’s RPO codes, especially the “AU0” code on the door sticker, can provide valuable clues about its key fob capabilities. However, for conversion vans and older vehicles, aftermarket systems and general wear and tear can complicate matters. Before jumping to expensive solutions, try cleaning your locks thoroughly. And remember, your VIN can be a useful tool for obtaining a new, potentially correct key. By systematically investigating these areas, you can often unlock the mysteries of your van’s lock and key system and find a practical solution.
