Major Concerns:
* Transmission (Even Though Replaced): While the transmission was replaced, find out *why* it was replaced originally. Was it a failure due to neglect (low fluid, overheating)? Get service records if possible. A replacement transmission's lifespan depends heavily on maintenance and driving habits. Pay close attention to shifting smoothness, any strange noises, or slips during acceleration. Check the transmission fluid level and condition. A properly maintained transmission should still have many miles left.
* 4WD System (If Equipped): Blazers of this era are known for issues with their 4WD systems. Check for engagement, disengagement, and any unusual noises when shifting into 4WD. Inspect the transfer case and front differential for leaks. Consider a professional inspection if you're not familiar with 4WD systems.
* Rust: A significant concern for vehicles of this age, especially those in areas with harsh winters. Thoroughly inspect the undercarriage, frame, body panels (especially around wheel wells and door bottoms), and rocker panels for rust. Surface rust is one thing, but penetrating rust is a major structural issue.
* Engine: Listen carefully for any unusual noises (knocking, ticking, whining) during a test drive. Check for oil leaks, coolant leaks, and proper fluid levels. Pay attention to the exhaust for any unusual sounds or smells. Consider a compression test if you're concerned about engine health.
Other Potential Problems:
* Suspension: Inspect the suspension components for wear and tear. Look for worn shocks, struts, bushings, and ball joints. Test drive over uneven surfaces to check for any clunking or bouncing.
* Brakes: Check brake pads and rotors for wear. Test the braking system for responsiveness and stopping power.
* Electrical System: Test all lights, power windows, and other electrical components. Look for any signs of corrosion in wiring harnesses.
* Steering: Check for play in the steering wheel and ensure responsive steering.
* Exhaust System: Look for rust, holes, or leaks in the exhaust system. A failing catalytic converter can be expensive to replace.
* Body: Check for previous accident damage. Look for mismatched paint, uneven panel gaps, and signs of repair.
Before You Buy:
* Pre-Purchase Inspection: It is highly recommended to have a trusted mechanic conduct a pre-purchase inspection. This is a worthwhile investment that can save you from expensive repairs down the line.
* Service Records: Obtain as many service records as possible. This will give you a better understanding of the vehicle's maintenance history.
* Test Drive: Thoroughly test drive the vehicle on various road surfaces. Pay close attention to how it handles, shifts, and accelerates.
A 1999 Blazer with that mileage will inevitably have some wear and tear. By carefully inspecting the areas mentioned above, you'll be better equipped to determine if the vehicle is worth the purchase price and avoid costly surprises later. Don't rush the process; take your time and be thorough.
