1997 GMC Sonoma Owner's Manual - Page 259

Check the fluidlevelonlywhenyour engine is off, the How to Add Fluid vehicle is parked a level place and the transmission is cool on enough for you to rest your fingers on the transmission case. Here's how to add fluid. Refer to the Maintenance Schedule to determine what kind of fluid to use. See follow Then, these steps: "Recommended Fluids and Lubricants" in the Index. 1. Remove the filler plug. 2. Add fluid at the filler plug hole. Add only enough fluid to bring the fluid level up to the bottom of the filler plug hole. 3. Install the filler plug.Be sure the plug is fully seated. Hydraulic Clutch The hydraulic clutch system in your vehicle is self-adjusting. A slight amount of play (1/4 inch to 1/2 inch or 6 mm to 12 mm) in the pedal is normal. It isn't a good idea to "top off" your clutch fluid. Adding fluid won't correct a leak. A fluid loss in this system could indicate a problem. Have the system inspected and repaired. 1. Remove the fillerplug. 2. Check that the lubricant level is to the bottom of up the filler plug hole. 3. If the fluid level is good, install the plug andbe sure it is fully seated. If the fluid level is low, add more fluid as described in the next steps. 6-21