Here's my latest car quandry: A week ago I took it to have new tires placed on my 300D. The car was performing just fine before that. It came out of the GoodYear shop and, low and behold, I noticed later that day that it was pulling to the right something fierce. On dad's advice I drove it for the rest of the week to get through a job interview, and then was out of town (without the car) for a couple days, so the car still pulls. It's livable, but annoying because in order to go straight, the steering wheel has to tip off to the left. Also, I noticed when I turn the wheel tightly to the left, I can hear this awful creaking/cracking sound eminate from within the left wheelwell. Tension on the wheel is fine, response is great.
On consulting with my dad, he seems to think it may have had an alignment problem before the new tires, but it wasn't noticable with the old, hard tires. My take is that the idiots at GoodYear probably did something wrong. Which of these scenarios sounds more likely?
If I have to take it back to the GoodYear place, I want to be armed with at least a little knowledge of the situation, so any input would be appreciated. I look forward to the days when I understand my car enough that I won't become frazzled and confused when little things go wrong! I'm working on it ...

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1987 300D, arctic white/palomino--314,000 miles
1978 240D 4-speed, Euro Delivery, light ivory/bamboo--370,000 miles
2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles
2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--19,000 miles
1982 Peugeot 505 diesel, 4-speed manual, blue/blue, 130,000 miles
1995 S320, black/parchment--34,000 miles (Dad's car)