I switched from a 55 series tire to a 45 series tire and now it pulls to the left pretty good. Most likely my alignment but it wasn't ever an issue before. Can dropping down a couple inches like that make an alignment problem more noticeable?

 

I switched from 55's to 45's but noticed no difference. Maybe lower tire pressure on one side??...or a good sized pothole.

 

Thats what it seems like, but last time i checked it was fine. I'll check it again to be sure tho.

 

you could have a radial tire pull. swap the 2 front tires if you can

 

+1...sounds like a tire pull to me. If the tires are non-directional, swap them left to right in the front and see what happens. If the truck pulls in the other direction or the pull goes away, the tire is the problem. If you have directional tires you can rotate them front to back, once again, if the pull goes away, you found your problem. If they're new tires, you should go back to where you purchased them and explain the situation and they should replace the tire for you.

 

Yea the 2 fronts can be swapped, i'll try that as soon as it warms up a bit. The tires where on the rims when i got them so no luck seeing a dealer about it. Never heard of radial pull. could it be dangerous if i wait to fix it?

Tire was about 4psi low, got some more air in it but still pulling a bit, but not as much as it was.