2004 Chevy trailblazer
2 Answers
Check battery connections first, tighten them up. Any power at all when you turn the key?
Just happened to me about a month back... ended up having to replace entire ignition lock cylinder after key was forced to turn... not recommended. Oops. To save approx $50 you can try a cheat from https://youtu.be/R7D3mxFwp4M Hope it helps...