Not necesarily. If you drove excess mileage without adding any oil, it could be that you've just used that much.
These are common for oil pan gaskets, if the oil level is a quart low it most likely isn't high enough to leak out the gasket
There are usually two oil lights; yellow for low oil level, and red for low oil pressure. Yours is most likely yellow, indicating your oil levels are low. It turns off when the car is moving because it's not low enough to register when the car's moving, as oil is moving through the engine, and the sensor is in the oil pan. You most likely have an oil leak or your car is burning oil; you just need to check the oil level at least 10 minutes after turning off the car, and add oil as needed. If it's at the lowest level on the oil dipstick, adding half a quart will do it.
Low oil pressure can be caused by multiple faults. A blown gasket, a cracked head, a leak in the line, or even a low level can cause low oil pressure.
one quart
if it's coming from the tail pipe or an exhaust leak, it means you have a blown head gasket!
The oil pressure on these trucks goes up and down as you drive. At idle it can get pretty low after the engine has some miles on it. I use a quart of Lucas Oil Stabilizer to replace one quart of oil at oil change. This seems to help all the way around. My 98 has 275,000 miles.
oil leak, worn rings burning oil if only a quart or two between oil changes not too much to worrie about on some engines but would have checked out.
put in 4 quarts, run it about a minute, wait a few minutes for the oil to drain back into the pan & check it. if it's a little low, add another half a quart or full quart depending on how low it is
Overheated, exhaust leak, oil leak on manifold-hard to speculate
the check oil light being on means that your low in oil. Your truck either has an oil leak or the valve cover gaskets are wore out or the covers need tightening. You should add some to it.
Oil pressure as measured by the guage on the dash is usually a measure of the pressure put out by the oil pump and not an indication of a leak or low engine oil level. If you have a leak your best indication of that will be puddles on the ground, on the underside of the engine or a milkiness looking color in the oil (as seen on the dipstick) or in the engine coolant.
The oil is at least a quart low. Usually, the bottom of the dipstick is 1.5 quarts. If you feel comfortable add a quart, let the engine sit (off) for about 10 min. Then recheck. Engine oil should be changed, at least, every three months. If it has been longer or over 3000 miles get the oil changed. If it has been three months or less and the oil is this low, get it to a service center. GM vehicles are notorious for blowing engines due to oil or coolant leaks.