Generally, 1994 Silverado trucks used either Dexron II or Dexron III automatic transmission fluid. However, never assume. Using the wrong fluid can severely damage your transmission.
To find the correct information:
1. Owner's Manual: This is the most reliable source. Look up the specifications for your specific truck model and transmission type.
2. Transmission Identification: The transmission type is usually stamped on a tag somewhere on the transmission case itself. This tag might indicate the recommended fluid type.
3. Chevy Dealership: A Chevrolet dealership can identify the correct fluid based on your vehicle identification number (VIN).
Do not rely on generic advice online. Using the incorrect transmission fluid can cause significant and expensive repairs. Take the time to properly identify your transmission type to ensure you use the correct fluid.