Your chariot awaits.
etsy. I'm deliberately not linking to the pattern because, quite frankly, the pattern was horrible. The listing mentioned that it was a one-size-fits-most type deal with only the strap marking being specific to my brand of car seat. But I tell ya, I had to alter the car seat cover so much that it would have been easier to take apart my old car seat cover and use it as a pattern. (I didn't do that because I was afraid that if I botched the project, I wouldn't have any cover for the car seat.) Anyway, I'll chalk this up to a life lesson learned. I'm happy with the final result and that's what matters.
I didn't follow one particular pattern when I made this. Here are three free tutorials that I skimmed to get the general idea: here, here, and here.
Brighton wanted me to take his picture. I was more than happy to oblige. :)
Baby beware, this boy practiced driving your stroller all over our corner of the neighborhood.
If Brighton keeps driving like he did today, this girl's gonna be in for a WILD ride!