BumpJr

So I finally upgraded, after many years, from my 01' Suburban to an 09'. Right now I'm going over it so I can bring back to dealers mechanic with any issues I've found. I got a squeal while driving in the front end along with a creaking sound in front suspension. The voltage also seems to slowly move back and forth between 13 and -5v. Thinking possible battery, alt was already changed. Had the cat, throttle body, o2 sensors and spark plugs replaced along with an oil line and fluid change. Anything I should into or get done on this model?? Also any recalls or other issues I should be aware of or watch out for?? Thanks in advance for any help

intheburbs

Biggest bugaboo is the AFM, assuming you have a half-ton with the 5.3. Watch your oil consumption.