To locate it:
1. Safety First: Park the truck on a level surface, engage the parking brake firmly, and chock the wheels. Wear safety glasses. The transmission fluid will be hot.
2. Locate the Transmission: The transmission is a large, rectangular case located towards the rear of the engine compartment, connected to the engine and the driveshaft.
3. Look for the Pan: The transmission pan is the bottom-most part of the transmission case. It's usually a relatively flat, rectangular piece of metal. You'll likely see a few bolts holding the pan onto the transmission case.
4. Find the Drain Plug (Usually on the Pan): The drain plug is typically located on one of the lower corners of the transmission pan. It's usually a smaller, simpler bolt than the pan bolts. It might be magnetic (to catch metal shavings). Sometimes, there's a small raised area or lip around it.
5. If you can't find it on the pan, check the side or rear of the transmission case. While less common, some transmissions have a drain plug directly on the case itself.
Important Considerations:
* Consult a Repair Manual: The best way to be absolutely sure is to consult a repair manual specific to your 1994 Chevy Silverado's transmission type. This will have diagrams showing the precise location.
* Take Pictures: Before you start, take pictures of the area. This will help you remember the location of the various bolts and how they were installed.
* Beware of Similar Bolts: There are many bolts in the vicinity of the transmission. Be absolutely certain you have the correct bolt before you remove it.
If you're not comfortable working on your vehicle yourself, take it to a qualified mechanic. Improperly draining transmission fluid can damage the transmission.
