I have an 08 Burb with the 5.3 - I traded my 03 F250 off on it a couple years back... shouldn't have done that! Love the burb but with all it's weight it does pretty good - it's when you add the boat to it that it is workin that motor out...
If they only made a Diesel Burb...!!! the 7.3 in my ford got around 20 ( towing)
- this thing...not so much. I added a Bullydog downloader which helps alot - but once you've pulled with a diesel - gas is a step back...
suspension is fine - did a brake upgrade to EBC rotors and yellowstuff pads - I'm happy for now...