High-Res Truck Decal Logo

My current logo is a PNG sitting at roughly 3000 px wide and only 72 dpi. Before I send it to the printer for large truck decals, I need it rebuilt so it holds up at full size.

Here is what I’m after:
• Clean, smooth edges—no jagged pixels when you zoom in.
• True 300 dpi (or higher) output.
• Overall dimensions in the 5000–6000 px range while keeping the proportions intact.
• Same color profile and look as the original.
• It has a slight white outline around certain parts of the design I want that gone too

Please deliver the final artwork as a high-resolution PNG plus the editable source file you work in (AI, PSD, or similar) so I have flexibility later. Let me know if anything about my original file or the target specs needs clarifying.