I found my08 to be lower on the passenger side on a few occasions so I tested for leaks by pulling the fuses. Is llosing about an inch of height after letting the truck sit for 36-48 hours (on all corners except the driver side rear which didn't lose any height) anything to be concerned about?

 

To clarify: which fuse did you pull?

 

Actually, I pulled the two fuses and the 1 relay that we're in the fuse box and showed the suspension picture (can't remember the numbers off the top of my head).

 

The only one that really matters is F26E

Make sure that's the one you pulled. 36-48 hours isn't the worst, if a whole axle drops it is likely the valve block for that axle, if it's a corner, likely between the valve block and that strut assembly. Sometimes lines or fittings get pinhole leaks.

 

Would fuse F3E also work? F3E gets its power through F26E.

 

I pulled both the F3E and the F26E. Pulled both because I wasn't sure which one so I figured pulling both wouldn't hurt. I have the valve block seal kits but I guess for the time being, I will just keep an eye on it and retest every couple of weeks to see if the air loss increases.