I have a 1999 Chevy Tahoe. The steering wheel jerks itself like someone grabs the steering wheel. It is very noticeable on two lane curvy roads. It feels like the truck hits a patch of ice. I have not had it repaired yet but was told by a service adviser that my truck has speed sensitive steering - it has an electrical wire hooked to the power steering pump to provide slow driving assistance. I am told that it sounds like the sensor or evo sensor for this system is bad. I have replaced the power steering pump to no avail. My step daughter has a 1997 Chevy 1/2 ton pick up with the same problem. She has had dobbs auto disconnect the system. I think this is very dangerous especially if you over- correct when the pressure changes or briefly gives way as I would describe. I wonder how many crashes are caused do to this gremlin in the steering system. The service manager as my local Chevy dealer seems to be aware of this problem.

- St. Louis, MO, USA

When driving vehicle, the steering jerks to the right and then is ok for awhile and then jerks again to the right. It is like someone jerks on the steering wheel.

- South Charleston, WV, USA

The hydraulic power assist sytem does not function properly is is a very dangerous problem. The steering wheel "slips" at high speed cause the vehicle to swerve suddenly while going around corners. I took the vehicle to the dealer to have this problem repaired, but after $1,000 of repairs, the problem still exists.

- Voorhees, NJ, USA

Steering feels like it is slipping or overpowered rt turns. The center position is gone when making a right turn. You need to turn the wheel back to center which can require multiple adjustments of the wheel causing swerving. Problem I am told be Chevy dealer is common and caused by evo sensor.

- Marlton, NJ, USA

The power steering failed, which caused the vehicle to jerk to the right.

- Springfield, MO, USA

Erratic power steering assist while driving. Feels like you have no control for a split second

- Yorktown, VA, USA

Power assist would cause too much assist causing vehicle to swerve suddenly. Failed part was sensor at bottom of steering column. Part failure common according to dealer parts salesman.

- Battle Ground, WA, USA

When turning right, steering wheel will jerk and vehicle will rock and swerve due to evo sensor module. Had evo sensor replaced. Dealer contacted. The evo sensor controls the power steering pump, the sensor is located in the steering column near the firewall on the cabin side.

- Acworth, GA, USA

Erratic power steering assist. Steering wheel input of approximately 15 degrees to the left results in unwanted additional left turn. Most noticable at speeds greater than 40mph.

- San Antonio, TX, USA

Failure caused steering at speed to be dangerously sensitive and steering would torque to the right or left when decelerating on an off-ramp when sensor tried to switch level of steering assist, as if running off road onto shoulder. Dealer states this is a problem they have seen and replaced sensor out of warranty. Was not obvious what the problem was until I realized the vehicle had speed sensitive steering. Most drivers would never realize failure had occured. Significant probability of contributing to a loss of control accident.

- Redondo Beach, CA, USA

Power steering is erratic on curves, mostly to the left. Tends to oversteer suddenly when engaged. Very tricky when road conditions are not optimal, I.e., rain. Happens intermittently so it can catch you offguard. Danger of an accident is imminent if not corrected soon.

- Austin, TX, USA

No summary listed for above vehicle.

- Maryville, TN, USA

Driver experienced a sudden momentary loss of power steering.

- Plano, TX, USA

Steering wheel doesn't come back after turning, which contributed to consumers accident.

- Concord, NH, USA

Power steering assist unit became overpowered at high speed. This caused the truck to handle upredictably when small steering inputs where used. It was hard to keep the truck on the road and in one lane. The problem was fixed by replacing a steering sensor but the problem is begining again.

- Garland, TX, USA