Radiator cap lbs

I got an leak, so I went down got an new radiator, thermostat, and cap, I just seen where they gave me an 16lbs, the manual calls for a 15lbs, that is what was on there.
? is does it matter that much, or do I need to get an 15lbs cap?
I have not started it yet, as I still have the trans filter to do today.

The parts store did the same thing to me about a month ago when I replaced my radiator, cap, and hoses. I didn't even notice it until I had put the new cap on. I can't say you'll be 100% fine, but I've run 1,000+ miles so far while trailering with no problems other than the occasional leak from a hose clamp. Having a new radiator is a plus, too.

I would check the fitting screwed into the water pump that goes to the heater core hose as well as the fitting screwed onto the back of the intake manifold. Some of these are made from die-cast zinc and prone to corrosion. Mine actually sprang a leak from the side, only to find out the threads holding it in were nearly eaten away. I had to remove and flush out the water pump to get any pieces out. My heater core had some in it too. If the part is magnetic, then you're okay, but check it for excessive internal rust. Some will just replace them with a NPT to hose adapter, but Dorman makes replacments in the HELP! section of the parts store. Just an FYI since you'll have it drained. Hope this helps!