Sounds like you're all stocked up with good oil & filters. As far as cleaning is concerned, you might run 1 round of Auto-RX. With 72K miles on it, I'm sure it wouldn't hurt.
Yes, they sure do. Congrats on the purchase. Oil/filter changes are pretty easy on the 4.2L. You may find a square plastic access door to remove on the plastic belly pan to get at the drain plug and filter. My door left me some time ago.quote:
Originally posted by edvanp:
..Do these engines really take 7 quarts of oil? I see it's spec'd for 5w30.
Yes the 3.42 gears are too tall for these trucks. They make off the line and low speed driving feel sluggish and dont seem to help the MPG's at all. Most have the 3.42's including minequote:
Originally posted by another Todd:
I have a 4.2 in my wife's trailblazer. Horrible gas mileage (about 14) decent but not exciting power at high RPM and not much torque to pull you off the line..