1997 Chevrolet Tahoe - Wheel jerks - what to check?

Steering wheel jerks suddenly as I am driving. Very scary

2WD? 4WD? Pushbutton 4WD? Miles on the truck?

STOP driving this right now before you hurt someone. TOW it to a shop. Have it inspected by a competent mechanic - specifically the front suspension, front end drive parts - axles, CV joints, diff if 4WD - and steering.

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