How long is GM coolant good for?

In the 1990s, GM introduced an engine coolant called Dexcool. It’s supposed to last 5 years or 150,000 miles, but there have been problems with this coolant. Cooling systems that use Dexcool exhibit more acid buildup and rust in the system when the coolant level gets low and oxygen is allowed to enter the system.

Are there any problems with the 5.3 liter Chevy engine?

The 5.3 engine not only can succumb to engine sludge, but to faulty sensors. While this is a very common problem with this type of engine, it can be frustrating nonetheless. There are some quality oil sensors that will increase the performance.

What causes a car to run on pressurized coolant?

When a vehicle overheats, or after the engine has been turned off after a long ride, an expansion valve opens inside the radiator cap to allow pressurized coolant to enter the overflow reservoir. If the expansion valve becomes stuck open, it allows a constant flow of pressurized coolant to enter the reservoir, where it turns to steam.

What causes coolant to enter the overflow reservoir?

Overflow Reservoir. When a vehicle overheats, or after the engine has been turned off after a long ride, an expansion valve opens inside the radiator cap to allow pressurized coolant to enter the overflow reservoir. If the expansion valve becomes stuck open, it allows a constant flow of pressurized coolant to enter the reservoir,…

What causes coolant to leak from the radiator?

A defective radiator cap gasket will allow coolant to escape in the form of steam. The steam disperses inside the engine compartment. With high engine temperatures, the steam evaporates or moisture collects on the engine compartment firewall and fender wells. Coolant loss results, without obvious puddles signs.

What should the coolant level be on a 2004 Chevy Silverado 1500?

Checking the engine coolant (also known as antifreeze) level in your 2004 Chevrolet Silverado 1500 is pretty easy. In order to get an accurate reading, your 5.3 liter engine should be cool to the touch when you check it. Engine coolant circulates through your engine to keep it cool in the summer but won’t freeze in the winter.

Can a 2004 GMC AC run out of refrigerant?

A 2004 GMC vehicle’s air conditioner will eventually run out of refrigerant; one day, you will turn on your air conditioner and find only warm air coming out. But you shouldn’t be overly concerned. You can easily find an R134a Freon recharging kit at most automotive retailers, and you can recharge the refrigerant quickly at home.

What happens when coolant goes out in a GM Truck?

Still trying to find the answer but have recently found an article illustrating the problem. If your General Motors SUV or truck is losing coolant, with no visible signs of a leak, the source may shock you Worse, allowing the problem to go on often results in a new engine.

What kind of coolant do you use on a Silverado?

I use Dexcool with a 50/50 mix. The new Dexcool is reformulated and is better than the old Dexcool. Always use distilled water. I hope you don’t have a leak somewhere as you indicate the level was low. That shouldn’t be happening. Thx for quick answers. I just buy it, the truck is really old and have got like 223 000 Km / 140 000 miles.