My dealer just installed general tire grabber at/2 tires 265/70/17 they put 30 psi in the side wall says 80psi Max this seems a lil low

 

I'd put 35 in if you use your truck for a car. Maybe up to 50 in the back if you tow lots or haul lots of weight. I think the manual for my '11 says 35 all around.

 

Depends. Did you get the load range E version? When I switched to the Load Range E LT BFG ATs I upped to 45 PSI to avoid uneven wear. But there is a Grabber AT2 that is regular (P) in that size and that I would run based on your door PSI.

 

Inside the door, there should be a sticker with the correct inflation. Use what's on the sticker, not what's on the sidewall.

Trust the engineers, not the shadetree mechanics.

 

The door jamb sticker is for the factory tires which are usually P rated and can run 32-35 psi. With a LT rated tire that has 80 psi max load you should run 42 to 45 psi for everyday use.

 

Load range e I don't do any heavy hauling really. Just want to get the correct psi before I go on vacation around 800 miles one way

 

This is definitely not a NEW question...

 

This. Max psi is just that, the max, its not optimal.

 

If you go to the tire manufacturers web site you should be able to find a chart that gives the inflation pressure required for different loads on the tire. Therefore the pressure is determined by the load that the tire carrys, not the pressure indicated on the sidewall. That is how they get at the pressure stated on the door sticker.
Al

 

Give it up. We have been down this road before. If only "new" questions were allowed, how would new(er) members get answers to 'their' new questions!?

Oh yeah, I forgot; newer members who have questions, previously asked and answered, should assume that; therefore, they should use the Search feature.