Tire and Wheel Related:
* Unbalanced tires: This is the most common cause. An imbalance in the tires' weight distribution will create a vibration that increases with speed.
* Bent rims or wheels: Impact damage to the wheels can bend them, causing vibrations.
* Worn tires: Uneven tire wear, particularly cupping or feathering, can cause shaking.
* Improper tire pressure: Incorrect inflation can affect tire balance and cause vibrations.
Suspension and Steering Components:
* Worn ball joints: These connect the control arms to the steering knuckles and allow for steering and suspension movement. Worn ball joints will create play and shaking.
* Worn tie rod ends: These connect the steering rack to the wheels. Worn tie rod ends lead to imprecise steering and shaking.
* Worn shocks or struts: These dampen the suspension's movement. Worn shocks/struts lead to a bouncy ride and shaking, especially noticeable over bumps.
* Worn control arm bushings: These bushings connect the control arms to the frame. Worn bushings allow excessive movement and shaking.
* Steering rack issues: A damaged or worn steering rack can cause vibrations and imprecise steering.
* Worn wheel bearings: Worn wheel bearings will create a rumbling or growling sound in addition to shaking.
Other Potential Causes:
* Brake rotor warping: Warped brake rotors can cause pulsating vibrations in the steering wheel, especially when braking.
* Driveshaft issues: While less likely to cause steering wheel shake alone, a damaged driveshaft can contribute to vibrations felt throughout the vehicle.
* Engine/transmission mounts: Worn engine or transmission mounts can transfer vibrations from the engine/transmission to the chassis.
Troubleshooting Steps:
1. Start with the simplest: Check tire pressure and visually inspect your tires and wheels for damage. Get your tires balanced and rotated if necessary.
2. Visual inspection: Carefully inspect your suspension components for visible signs of wear, damage, or looseness.
3. Test drive: Pay attention to when the shaking is most noticeable (at specific speeds, when braking, etc.). This can help pinpoint the source.
4. Professional diagnosis: If you can't identify the problem yourself, take your Tahoe to a qualified mechanic for a thorough inspection and diagnosis.
Safety Note: Driving a vehicle with a significant shake in the steering wheel can be dangerous. Have the issue addressed promptly by a qualified mechanic to ensure your safety.
