* Maintenance history: A meticulously maintained truck with documented service records showing regular oil changes, timely repairs, and attention to key components (like the transmission and differential) can easily outlast a neglected truck with twice the mileage. A well-maintained truck at 250,000 miles might be in better shape than a poorly maintained one at 150,000 miles.
* Driving conditions: Mostly highway miles are far easier on a vehicle than constant stop-and-go city driving. Off-road use puts significant strain on the truck's components.
* Specific components: Look for signs of wear and tear on key parts like the engine, transmission, suspension, and frame. A pre-purchase inspection by a mechanic is essential.
* Price: A high-mileage truck should be priced accordingly. If the price reflects the higher mileage and potential for repairs, it might still be a worthwhile purchase.
Generally speaking, a 1998 Silverado Z71 with over 200,000 miles is considered high mileage. However, a well-maintained truck could easily exceed that. Anything above 250,000 miles is definitely considered very high mileage and would require a very thorough inspection before purchase. You should be prepared for potential repairs, even with lower mileage.
Instead of focusing on a specific mileage number, focus on the condition of the truck. A pre-purchase inspection from a trusted mechanic is the best way to determine if the truck is worth buying, regardless of its mileage.