Champion Chevrolet False Repair Diagnosis Reno Nevada

We took our vehicle in to Champion Chevrolet for its 100,000 mile service, and the service manager told us it would not cost more than $1,600. The service estimate included a lube, oil & filter change, check & set tire pressure, multi-point vehicle inspection, BG transmission flush, tune up, brake fluid flush, air induction service, power steering flush and cooling system flush. The final cost was $1517.62. My husband asked them to check the power steering column because it was loose. They reported the power steering column was broken and a bearing needed to be replaced at a cost of approximately $1600. My husband declined replacement. They put on the estimate the power steering column is damaged and the vehicle was unsafe to drive, but only noted trim replacement of $118.90, and not the $1600 estimated bearing replacement cost they said was needed. Eighteen days later I took the vehicle to a local repair shop to get an estimate for repair of the power steering column. The repair shop said the bolts were loose and simply needed to be tightened, requiring about 1 hour in repair labor and costing about $75. That repair was completed and we've had no further issues. The repair shop said there was nothing else wrong with the power steering column. I am a female and the usual driver of the vehicle. I had not noticed the power steering being loose and had no issues in steering prior to this experience, but my husband, who is much larger, said he noticed it. I thought perhaps he loosened the bolts leaning or yanking on the steering wheel entering or exiting the vehicle on his trip. Crux of issue is a stab at charging a customer for unnecessary repairs at a prospective cost of $1600 when the repairs at most should have cost $75.