transmission control module

I have a 1998 Buick Century Custom with 220,000 miles. I bought it with 207,000 so I don’t know if/when the transmission has been serviced. 1 week ago on my way home from work, my check engine light came on. I ran the code with the fixD scanner I have and it says the code is p1870...

So this has happened 3 times this week. The first time I thought it was a fluke. About a minute after pulling away from dropping my daughter off at school, the car quickly shifted into park, the door locks cycled like I parked, then neutral. It was just long enough in park to feel the jerk from...

I see an intermittent message "Service Transmission" on my 2017 Lacrosse with 66k miles on it. There is no "check engine light," and this message usually appears when I park the vehicle or put it in neutral. I scanned with the OBD2 tool, and the code is P07BB, "Transmission Park Position...

Recently I was dealing with a weak/dead main car battery, and since then I installed a new battery. I am getting these GM DTC 3 codes when connected to diagnostic scanners (no MIL -Malfunction Indication Light), also there are no errors on the instrument cluster. The car drives fine. P175F...