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jack up truck, put stand under
pull off tire.pull out cotter pin,of TRE
*IF i rember right, its a 19mm or 3/4 nut
pullthe nut off, wack the steering arm on the knuckle a few times, get the TRE to pop out of the tapper.
count how many threads, or measure, how far the TRE is away from the Adj sleve,
15mm nut on the ADJ sleave, turn it out.
get new part, install. pretty simple.
depening on your skill and luck you may need a alighment afterwards to re set toe