Where is the transmission relay located on a Gmc Vandura 2500?

The transmission relay on a GMC Vandura 2500 is typically located in the fuse box, which is usually found under the dashboard on the driver's side or in the engine compartment. The exact position may vary slightly depending on the model year, so it's advisable to consult the owner's manual for the specific relay diagram. Additionally, it may be helpful to check for any labeling on the fuse box cover.