Vehicle shown in this step: 2000 GMC C3500 Sierra SL 7.4L V8 Extended Cab Pickup (2 Door)
Procedure notes
Checking the oil in a S15 is fairly easy and should be done once a month. Note that most GMC have an oil pressure gauge next to the speedometer - this gauge does not tell you what your oil level is, but rather uses an oil sensor to indicate the oil pressure in the engine. If you have an oil light illuminate in your S15, this means your oil pressure is either high or low. The video above will show you how to check the oil level in your 1990 GMC S15 by taking an accurate dipstick reading. Make sure your engine is cold when you check the oil in your S15. Otherwise the dipstick will read slightly low. In addition to checking the oil level, you also want to look at the condition of the oil when you have the dipstick out. If the oil in your S15 is dirty or smells like gasoline, you probably need an oil change.
If you notice that the oil level in your S15 is extremely low or empty, fill it up and check it again the next time you drive. If it is extremely low again, have your mechanic take a look before driving it much more.
查看中文对照 · Chinese translation
检查S15的机油相当简单，应每月进行一次。 请注意，大多数 GMC 车型在车速表旁边都设有机油压力表，该表并不能显示机油液位，而是通过机油传感器来显示发动机内的机油压力。 如果你的S15车辆中机油灯亮起，说明机油压力要么过高，要么过低。 上述视频将向您展示如何检查您的 1990 GMC S15 的机油液位，通过准确读取油尺数值来完成。 检查S15机油时，确保发动机处于冷态。 否则油尺的读数会略低。 除了检查机油液位外，当你取出油尺时，还应观察机油的状态。 如果您的S15机油变脏或有汽油味，您可能需要更换机油。
如果发现您的 S15 机油液位极低或为空，加注后下次驾驶时再次检查。 如果冷却液仍然极低，务必在继续驾驶前请技师检查。