Tire and Wheel Related:
* Tire Balance: This is the most common cause. Uneven weight distribution in your tires causes them to wobble at higher speeds. Get your tires rebalanced.
* Tire Rotation and Condition: Uneven tire wear (cupping, feathering) can induce vibrations. Rotate your tires to distribute wear evenly and check their tread depth and overall condition. Consider replacing worn or damaged tires.
* Wheel Balance: Similar to tire balance, imbalanced wheels can cause vibrations. Check for bent wheels; even a slight bend can create a noticeable shake.
* Wheel Alignment: Misaligned wheels pull the vehicle, causing vibrations and uneven tire wear. Get your alignment checked and corrected.
* Lug Nuts: Ensure all lug nuts are properly tightened to the manufacturer's specifications. Loose lug nuts can cause vibrations and are a safety hazard.
Drivetrain Related:
* Driveshaft: A bent or damaged driveshaft can cause vibrations at highway speeds. Inspection by a mechanic is needed.
* U-Joints: Worn or damaged universal joints (U-joints) in the driveshaft are a frequent culprit of vibrations. They need to be inspected and possibly replaced.
* Transmission: Transmission problems, though less likely to cause a vibration *only* at 60mph, can contribute. A slipping transmission or internal issues might manifest as vibrations. This requires a professional diagnosis.
* Differential: Problems within the rear differential (worn bearings, damaged gears) can create vibrations that are speed-dependent. This needs professional attention.
Other Possibilities:
* Brake Rotors: Warped brake rotors can cause vibrations, especially when braking, but can sometimes be felt as a slight shake even when not braking. Inspection is required.
* Suspension Components: Worn ball joints, tie rod ends, or other suspension components can contribute to vibrations, though less likely to be isolated to only 60 mph.
* Body Issues: While less common, a collision or other damage affecting the frame or body could subtly influence vibrations.
Troubleshooting Steps:
1. Start with the simplest: Check tire pressure, visually inspect tires for wear and damage, and ensure all lug nuts are tight.
2. Get a professional tire rotation and balance: This is the first step for most vibration issues.
3. Wheel Alignment: If the balance doesn't solve the problem, get an alignment check.
4. Comprehensive inspection: If the problem persists, take your Silverado to a mechanic for a thorough inspection of the drivetrain, suspension, and braking system.
Don't ignore the shaking. Continuing to drive with a persistent vibration can worsen the underlying problem and potentially lead to more serious damage or safety hazards. Professional diagnosis is recommended if the simpler checks don't resolve the issue.
