What should I do if the GMC K3500 suddenly overheats? What would be a safe course of action in this situation?
Slow down and pull over to the shoulder. As you do this, turn off the A/C and switch on the heater. Kill the engine as soon as the vehicle gets to the shoulder. Pop the hood to let the engine cool down. This may take about 20 minutes. Once the engine has cooled down, that's when you should look for the cause of the overheating problem, which could most probably be a fault at the cooling system. There could be a cracked hose, a loose or torn drive belt, or a leaky or clogged radiator. It's possible that the engine is running low on coolant. Don't touch the radiator cap until the engine is off and the radiator's top is already cold. If you don't find a collapsed hose or broken belt and you still can't figure out the cause, you'll just have to add more coolant. See if you can start vehicle and take it to a service facility as you drive gently. Otherwise, you'll need to call for some roadside assistance.
This is odd—there's a burning carpet smell on my GMC. I checked the carpet to look for any sign of burning, but it's perfectly fine. What could be wrong with my K3500? Where is this strange smell coming from?
This kind of smell warns you of a brake problem. This is especially alarming if you can smell this during normal driving conditions. You have to get your brake system checked as soon as possible. Find out what kind of brake trouble you're dealing with. Have this fixed this right away for your driving safety.
The engine seems to be consuming more coolant than usual, which makes it run hotter, close to overheating. I've also noticed that the engine misses when I restart it. What could possibly be the problem here?
When the coolant level drops and the engine seems to be using up more cooling fluid than usual, the problem could be coming from a bad head gasket or a broken engine block. If there's water in oil, then this could be a symptom of a blown head gasket. If you can't find water in oil, it could be that the coolant that's getting into the cylinder is dispersed through the exhaust and not flowing into the oil system. The engine may miss when restarted as coolant is pushed into one of the cylinders through pressure when the engine is off. When it's restarted, there would be a miss as coolant is sent out into the exhaust, which may cause the steam to come out of the tail pipe. But because a bit of moisture in the exhaust isn't unusual, especially on a cold morning startup, the steam from the tail pipe doesn't automatically mean that there's a blown head gasket. To confirm, some tests should be done to see if the vehicle has a bad gasket and if the coolant is leaking into the cylinders.