* Shift Interlock Cable/Mechanism: This is the most common culprit. The cable or mechanism that releases the transmission from park is either broken, jammed, or out of adjustment. This is usually a relatively simple and inexpensive repair, often involving adjusting the cable or replacing a faulty part.
* Broken Shift Lever: While less common, the lever itself could be damaged or broken internally, preventing it from moving out of park. This would require more significant repair.
* Transmission Linkage Problem: The linkage connecting the shifter to the transmission might be bent, broken, or disconnected.
* Low Transmission Fluid: While unlikely to *completely* prevent shifting out of park, extremely low fluid can cause internal issues that manifest as shifting problems. Check your transmission fluid level – it should be within the range indicated on the dipstick. (Remember the engine needs to be running and at operating temperature for accurate transmission fluid level reading on most vehicles.)
* Internal Transmission Problem: This is the worst-case scenario. Problems within the transmission itself, such as a broken shift fork or other internal component, could prevent it from shifting. This would usually be accompanied by other transmission issues, such as difficulty shifting into other gears or slipping.
* Faulty Parking Pawl: The parking pawl is a mechanism that locks the transmission in park. If it's malfunctioning, it could be stuck engaged.
* Electrical Issue (Less Likely): In some modern cars (though less likely on a 2000 Metro), an electrical problem with the shift interlock system could be the cause.
What you should do:
1. Check the obvious: Ensure the parking brake is fully released. Try gently rocking the car back and forth while attempting to shift. Sometimes a little movement can help free a stuck mechanism.
2. Check the transmission fluid: Check the level and condition of your transmission fluid. If it's low or dirty, it's a problem that needs addressing, regardless of the park issue.
3. Inspect the Shift Cable (if accessible): Look under the hood and around the transmission for the shift cable. See if anything is obviously broken, disconnected, or severely bent.
4. Consult a repair manual: A repair manual specific to your 2000 Chevy Metro will provide detailed diagrams and instructions on troubleshooting the shifting mechanism.
5. Seek professional help: If you're not comfortable working on your car yourself, take it to a qualified mechanic. They have the tools and expertise to diagnose the problem accurately and perform the necessary repairs. Trying to force the shifter can cause significant damage.
Don't attempt any repairs beyond simple visual inspections unless you have experience working on vehicles. A misdiagnosis can lead to more costly repairs.
