Underperforming Page - How to handle it?

I work in commercial truck insurance - a niche space within P&C insurance. Competition is relatively low, but I am up against large insurance companies with high authority taking up space and competitor agencies with large marketing budgets. I've had pretty decent success, but I'm frustrated with one area. GEICO recently released their commercial trucking program and I rushed to publish a blog post about it to catch truckers looking into it as word spreads around the industry. The blog post is fairly comprehensive and touches on most subjects. I wrote another blog post a month later specifically about GEICO's dump truck insurance product. I think this messed with my other blog post ranking and both seem to be stuck on the second or third page. So far I have two thoughts: 1. Delete the dump truck insurance blog post. 2. Edit the original blog post and rewrite the content to see how it fairs. What do you think? Happy to take suggestions. I know just enough about SEO to be dangerous!