1. Dealerships and Parts Stores:
* Chevrolet Dealership: This is your best bet for a genuine GM part, if the truck originally came with a factory block heater. However, they may be expensive. Give them the VIN for the most accurate part identification.
* Auto Parts Stores (NAPA, AutoZone, Advance Auto Parts, etc.): These stores often carry a selection of freeze plugs, but you'll likely need to know the specific size and type of plug you need. Bringing the old plug with you for comparison is highly recommended. They might also have aftermarket block heater kits if you need to add one.
2. Online Retailers:
* eBay: You might find used or new plugs here, often at competitive prices. Be aware of the seller's reputation.
* Amazon: Similar to eBay, but usually with more organized listings and seller feedback.
* RockAuto: A popular online auto parts retailer with a wide selection and usually competitive pricing.
3. Specialty Truck Parts Suppliers:
There are online and brick-and-mortar businesses specializing in parts for classic and older trucks. These may be a good source if you're having trouble finding the part elsewhere.
Before you buy:
* Identify the correct size and type: The most crucial step. Measure the diameter of your existing freeze plug (if you still have it). The type will depend on whether it's threaded or not, and if it is a standard freeze plug, or a freeze plug with a block heater element in it.
* Check for compatibility: Make sure the freeze plug is compatible with your specific 350 engine. There are different variations of the 350 engine, and the block heater might not be the same size on all of them.
In short, start with your local parts stores and then explore online options if necessary. Bringing the old plug for comparison will drastically increase your chances of finding the right replacement.
