* Maintenance: Regular maintenance, including oil changes, fluid flushes, and repairs as needed, significantly extends the life of any vehicle. A well-maintained 1998 Silverado could easily last 200,000 miles or more.
* Driving conditions: Harsh driving conditions (off-roading, heavy towing, constant stop-and-go traffic) will wear a vehicle down faster than gentler conditions. The Z71's off-road capabilities mean it's more likely to be subjected to harsher conditions.
* Storage: Proper storage when not in use can help prevent rust and other forms of degradation.
* Previous repairs/accidents: A vehicle with a history of major repairs or accidents may not last as long as one in pristine condition.
* Rust: Depending on where the truck was driven and stored, rust can be a major factor in the lifespan of a vehicle, especially one of that age.
While some 1998 Silverado Z71s might still be running today, many have likely been scrapped or are in significantly deteriorated condition. With proper care, it's *possible* to get well over 200,000 miles out of it, but that's not guaranteed. Many factors beyond just the year of manufacture determine how long it will last.
