* Tire Problems: This is the most common culprit. Look for:
* Uneven tire wear: This can cause vibrations and wobbling.
* Low tire pressure: Underinflation can lead to instability.
* Damaged tires: Look for bulges, cuts, or other damage.
* Improperly balanced tires: Wheels that aren't properly balanced will cause vibrations.
* Worn tires: Tires nearing the end of their tread life can lose their ability to grip the road properly.
* Suspension Issues: Worn or damaged suspension components can affect handling and stability. This could include:
* Worn shocks or struts: These dampen bumps and vibrations. Worn ones allow excessive movement.
* Worn ball joints: These connect the control arms to the steering knuckles. Worn joints lead to play and instability.
* Worn tie rod ends: These connect the steering rack to the wheels. Worn ends result in loose steering.
* Damaged control arm bushings: These bushings can wear out, causing looseness in the suspension.
* Steering Problems: Issues with the steering system can also contribute to wobbling:
* Worn steering linkage: This includes tie rod ends, idler arm, and other components.
* Loose steering components: Any loose connection in the steering system will affect stability.
* Wheel Bearing Issues: Worn wheel bearings can create a wobbly feeling, especially at higher speeds.
* Brake Issues: While less common, warped brake rotors or calipers could contribute to vibration.
* Drivetrain Issues: In rare cases, problems with the drivetrain (driveshaft, differential) can cause vibrations that feel like wobbling.
What to do:
Do not continue driving at high speeds if your Blazer is wobbling. This is a safety hazard. Take it to a qualified mechanic or tire shop immediately. They can diagnose the problem and perform the necessary repairs. Trying to diagnose and fix this yourself is strongly discouraged unless you have significant mechanical experience.
