2003 Buick Century Questions

All 2003 Buick Century Questions

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What might have been disconnected from a 2003 buick century trans that when a shop found it disconnected reconnected it and when they did reconnect it, it caused the car to start acting up? shifting weird, or eratical...
Still not working. What could be the problem?
I turn my head lights on and only the driver side low beam works I turn the high beam on and the passenger side works only I have no low beam lights??
Won't enter program mode for new key fobs, no 3 beep for program mode. And when locking with car door button it chirps 3 times but no lock till hit button again, every time. Horn does not work also. Just bought car...
IT DOES IT IN COLD WEATHER THE CAR SHUTS DOWN EVERYTHING BUT THE BATTERY IS STILL CHARGED AND THE ONLY WAY IT WILL START IS BY JUMPING IT. THIS IS MY FIRST WINTER WITH THE CAR
It'll shift to first gear almost perfectly , it just will not shift into high gear.
estimate of cost to replace a muffeler
The unit clicks, as usual, when it's pushed in. I've been able to remove the hand-hold that's integrated into the plastic body and dislodge the backing. Just can't figure out how to change the small bulb or figure out...