* Engine type: The Blazer has used various engines over its many generations. A small 4-cylinder will likely have a different lifespan than a V8.
* Maintenance: Regular oil changes, proper cooling system maintenance, and addressing issues promptly significantly impact longevity. Neglect leads to premature wear.
* Driving habits: Aggressive driving puts more stress on the engine than gentle driving.
* Environmental conditions: Extreme temperatures and dusty environments can accelerate wear.
* Quality of repairs: Poorly executed repairs can shorten engine life.
While some Blazer engines might last 200,000 miles or more with diligent care, others might fail much sooner due to neglect or inherent flaws. It's impossible to give a definitive average without specifying the exact engine and its maintenance history.
