The 1999 Chevy Metro 1.0L (likely a Suzuki-built engine) doesn't have a traditional PCV valve in the same way many larger engines do. Instead, the positive crankcase ventilation system is integrated into the valve cover. There's no separate, easily identifiable PCV valve to replace. The venting is usually handled through hoses and passages within the valve cover itself.
If you're experiencing problems related to what you *think* might be a PCV valve issue (like excessive crankcase pressure or oil leaks), you'll need to look at the valve cover, the hoses connected to it, and the overall crankcase ventilation system for clogs, leaks, or damage. A mechanic familiar with the Metro's engine would be best equipped to diagnose such problems.
