2001 Buick Park Avenue Q&A

2001 Buick Park Avenue Question: Speedometer is reading 20 to 30 mph too fast.

I am ASE mechanic as side job. -
Answer 1
make sure you have the correct tire size on the car. otherwise, the trans gear inside the governor may be at fault. Roy -
Comment 1
The tires have not been replaced, it just started doing this about 1 week ago. I suspect the speed sensor is failing. -