Vibration and noise from front end while driving

The half shafts o.k.?

Does the vehicle make any noises while driving? If there is a "growling or roaring " noise associated with the vibration, check the right front hub bearing. If there are no noises and only vibration, check the right front upper ball joint and control arm bushings. The Trailblazer's upper ball joint and control arm bushings become worn and cause the tire and wheel assembly to shimmy while driving. The vibration stops when turning left because of weight transfer to the right side which keeps the wheel steady for a moment. Also, check the tire for irregular wear.

This could be the harmonic balancer or the torque converter.

Try jacking the vehicle up and testing. If noise still present then possible wheel bearing failure.

Front Driveshaft bearings defect or worn
When engaging the 4wd or axles or front axle
hope it helps

You need to have someone look at it that is experienced in NVH (Noise, Vibration and Harshness). Front end vibrations can be caused by many things. Each possibility needs to be systematically eliminated to find the cause. Someone who is experienced in this can eliminate several possibilities by simply driving the vehicle...Did the tire shop even bother to road test it? I'll bet not!

Sometimes INTERNAL tire problems can cause a vibration that cannot be found (or eliminated as a possibility) by putting the tires on a balance machine. To eliminate this as a possibility, rotate the tires front-to-rear one side at a time then drive the vehicle to see if the vibration changes or "moves". If it does, then the tire that just got rotated to the rear is the problem.

Also, the vehicle can be run on a lift to see if the vibration can be duplicated in the shop. Many times, if the vibration is being caused by a drive axle or CV joint, it can be located by running the vehicle on a lift this way. In the case of 4-wheel drive vehicles, it will be necessary to engage the front axles to get them spinning on the lift.

The entire steering and suspension system should be checked for looseness in the tie rods, stabilizer links and frame bushings, control arm bushings, etc. Any looseness in any of these parts can cause vibrations at certain speeds.

I have also seen vibrations that act similar to a tire being out of balance that occurs when the brake rotors loose a balancing weight on some vehicles. This may or may not apply to your vehicle, (yours may not have balance weights in the rotors) but this type of vibration can usually also be verified by running the vehicle on a lift.

Check the front wheel bearings .... very common . While driving turn the wheel gently from side to side and see if the noise changes .. this will load and unload the bearings.

Have front tire's check out, but more then likely you have a bad front hub bearing. Have it taken to a repair shop where they can put it up on a lift and checked.

The drive shaft needs to be replaced.its slightly bent or damaged.Check end float on both drive shafts for excesive movement.Also check for lift in the driveshaft gearbox bearings.Hope that is helpfull.good luck.

Check the U-joints and axle baerings. But its most likely because the truck is in four wheel drive.