* Maintenance history: This is the single most important factor. A Trailblazer meticulously maintained with regular oil changes, timely repairs, and adherence to the manufacturer's recommended service schedule can easily surpass 100,000 miles with many years of reliable service left. A neglected vehicle with a spotty maintenance history will likely have significant issues at 100,000 miles or even sooner. Ask for detailed service records.
* Driving conditions: Mostly highway driving is gentler on a vehicle than constant stop-and-go city driving. Off-road use puts significant stress on the vehicle's components.
* Specific model year and engine: Certain model years or engine types might be known for specific issues that appear around the 100,000-mile mark. Research the specific year and engine of the Trailblazer you're considering.
* Pre-purchase inspection: A thorough pre-purchase inspection by a trusted mechanic is crucial. This inspection should identify any potential problems before you buy the vehicle.
In short: 100,000 miles isn't automatically a deal-breaker. Focus on the maintenance history and a pre-purchase inspection. If the maintenance is good and the inspection reveals no major problems, a 100,000-mile Trailblazer could be a perfectly sound purchase. If the maintenance is questionable or the inspection reveals significant issues, you should walk away.
