My 2006 Chev Cobalt will go in reverse but not forward. Any thoughts? Backed it in driveway on a Friday, got in Saturday Morning and it wouldnt go.
Is this an automatic or manual transmission? Have you confirmed that it will still go in reverse, but not forward?
If an automatic: Is it making any noises or is there any movement in the car as you cycle forward/backward through the transmission (P, N, D, etc.)?
If manual: If you depress the clutch pedal, can the car roll easily?
Is the CEL (check engine light) or any other warning lamp on?
There are many possibilities here, but without more detail it's really difficult to help you troubleshoot.