* Loss of Lubrication: Engine oil lubricates all the moving parts. Without it, these parts rub against each other with extreme friction.
* Increased Heat: The friction generates immense heat, causing parts to overheat and expand.
* Metal-on-Metal Contact: Without lubrication, metal components grind against each other, causing scoring and seizing. This is especially damaging to the crankshaft, connecting rods, and camshaft.
* Bearing Failure: Engine bearings are designed to withstand the pressure and friction with the help of oil. Without oil, they fail, leading to complete engine seizure.
* Damage to Cylinder Walls: The pistons constantly rub against the cylinder walls. Without oil, scoring and damage occur to these surfaces, often requiring a rebuild or replacement.
* Engine Seizure: In the worst-case scenario, the engine will seize completely, meaning the moving parts become locked together and the engine will no longer turn.
* Potential for other damage: The resulting heat can also damage other components, such as the oil pump (which is now working against nothing), the timing chain or belt.
In short, running a 2004 Chevy Trailblazer (or any vehicle) out of oil will almost certainly lead to a very expensive engine repair or replacement. It's crucial to regularly check your oil level and change it according to the manufacturer's recommendations.
