I need some, what are the correct #'s for an 04 lly 4x4? FW338, 15225770? Where can I get the best price? Please help! Also, do I need to do both sides or just the bad one?

Read here

http://www.dieselplace.com/forum/showthread.php?t=187031


And just do the bad one, or unless you just want to swap the other one.

just did this, not a horrible job other than the 21mm caliper bolts. Total time can be a leisurely 2.5 hrs(which is being really leisurely). I took this opportunity to grease the caliper slides and do some general poking around.

I wouldn't do more than needed since these are a good $200 or a crack unless you just want to. I used the timken part, but the FW 338 part seems the same(supercedes the fw289 or whatever it is). If you're not in a hurry order online, if you are go to Napa or the like.

timken sp580304 comes with the ABS wiring.

shop around. the hub assembly would be different prices at the local parts stores. i have gotten them in FL from Bennetts for $198 each.

Pretty easy change. About 7 bolts and one large nut for the spindle. Air compressor makes life easier.