Here's what's *more likely* happening and what you can try:
* The problem is unrelated to the ignition switch: The ignition switch replacement might have exposed a pre-existing issue. Double-check all your connections during the replacement. A faulty connection or a damaged wire is more likely than a computer issue requiring dealer intervention.
* The car needs to relearn the key: Some anti-theft systems require the vehicle to learn the new key. This usually involves a simple procedure (like turning the ignition on and off a few times). Your owner's manual should detail this. If it doesn't, you can find instructions online by searching "2005 Chevy Malibu Classic key programming."
* The computer needs to relearn the new switch parameters (less likely): This might involve a simple procedure, but it's less probable. Most modern cars handle this automatically after a few ignition cycles.
Before heading to the dealer (who will likely charge you significantly), try these:
1. Check all your connections: Ensure the new ignition switch is properly wired and securely connected. Even a slightly loose connection can cause problems. Visually inspect the wiring harness for any damage.
2. Check the battery: A weak battery can sometimes cause electronic gremlins. Make sure your battery is fully charged.
3. Consult your owner's manual: Look for sections about ignition switch replacement or key programming.
4. Search online forums: Search for "2005 Chevy Malibu Classic ignition switch replacement problems" or similar phrases on automotive forums (like GM-specific forums). Other owners might have encountered similar issues and found solutions.
5. Use an OBD-II scanner: An inexpensive OBD-II scanner can read diagnostic trouble codes (DTCs). This might give you clues about the actual problem.
Only if you've exhausted all the above troubleshooting steps should you consider taking it to a dealer. Even then, get a quote *before* they start any work. A simple diagnostic check might be all that's needed to resolve the issue.
