You must be on the wrong forum.... everybody on this forum has had 157 lifters and pushrods replaced, is on their second engine and transmission replacement, third blown A/C compressor, second oil cooler line, third rear glass replacement, etc. , etc. in the first 40,000 miles !
Thanks for coming on and posting positive news !!! Congrats on the 100K !
I'm at 52K. Idler pulley and belt replaced and rear window leak fixed. 5.3 with 22.3 MPG average to this point.
Reading most of this forum I expected mine to blow up out from underneath me like a cheap Chinese firework !
Fluid changes, belts and hoses, plugs, water pump, and the other things mentioned in other post should be the ticket.
Most important do what you have been doing for the past 100K. Your truck likes it !!