1996 GMC Savana Van Owner's Manual - Page 230

When you put the cap back on, turn it to the right until you hear at least three clicks. Make sure you fully install the cap. The diagnostic system can determine if the fuel cap has been left off or improperly installed. This would allow fuel to evaporate int.0 the atmosphere. See "Malfunction Indicator Lamp" in the Index. Checking Things Under the Hood To open the hood, first pull this handle inside the vehicle. It is just in front of the driver's side door frame near the floor. I NOTICE: If you need a new cap, sure to get the right be type. Your dealer can get onefor you. If you get the wrong type, itmay not fit or have proper venting, and your fuel tank and emissions system might be damaged. 6-6