Steering and Suspension:
* Alignment: This is the most common cause. Improper alignment angles (caster, camber, toe) will cause the vehicle to pull. A professional alignment is essential.
* Worn ball joints: These connect the control arms to the steering knuckles. Worn ball joints will create play in the steering and cause pulling. Inspect for excessive play.
* Worn tie rod ends: Similar to ball joints, worn tie rod ends will create looseness in the steering and cause pulling. Check for play by grabbing the tie rod end and trying to move it.
* Worn or damaged suspension components: This includes things like control arm bushings, strut mounts, and shocks/struts. Worn components can affect the suspension geometry and cause pulling. Inspect for excessive wear or damage.
* Steering linkage: Check for any damage or looseness in the steering linkage components, including the tie rods and drag link.
* Power steering issues: Low power steering fluid, a failing power steering pump, or leaks can cause pulling. Check the fluid level and look for leaks.
Brakes:
* Seized caliper: A caliper that's seized on one side will drag the brake pad, causing the vehicle to pull to that side. Inspect the calipers for movement.
* Uneven brake pad wear: Significant differences in brake pad wear between the left and right sides can cause pulling. Inspect the brake pads.
Tires:
* Tire pressure: Uneven tire pressure will cause pulling. Ensure all tires are inflated to the recommended pressure (check the sticker on the driver's side doorjamb).
* Tire wear: Uneven tire wear (one side worn more than the other) can indicate alignment issues or other problems. Inspect the tire tread for uneven wear.
* Different tires: Using different tires on the same axle (e.g., different brands, tread depth, or size) can cause pulling. Ensure all tires are the same.
Troubleshooting Steps:
1. Check tire pressure and wear: This is the easiest and cheapest thing to check first.
2. Visual inspection: Carefully inspect the steering, suspension, and brake components for obvious damage or wear.
3. Test drive: Pay attention to when the pulling is most noticeable (e.g., at certain speeds, while braking).
4. Alignment check: If the visual inspection doesn't reveal anything obvious, get a professional wheel alignment.
5. Professional inspection: If the alignment doesn't solve the problem, take your Tahoe to a qualified mechanic for a thorough inspection.
Important Note: Driving a vehicle that pulls to one side is unsafe. Don't delay addressing this issue. The longer you wait, the more severe the problem could become and potentially cause an accident.
