- Jan 18, 2006
I just got a 2007 Chevy Silverado Z71.Want to get everyones idea on intervals for all the fluids.Truck will very rarely if ever be used for towing or heavy duty hauling. Sees 50/50 city highway and probaly 15k per year.The tranny fluid is Dex6 and the highest tranny temp Ive seen yet was 172.Should synthetic engine oil be used since this engine has soleinoids to deactavate the lifters on 4 cyl when it goes into gas savers mode. I was thinking engine oil and filter every 7500 or 6 months using mobil1 or pennzoil plat,Trans pan drop and filter change every 2 years at around 30k ,and axles and transfer case every 2 years or 30k.Is this too conservative? Ive seen these Z71's go 300k on nothing but once a year oil changes. I just want mine too last a long time and be in tiptop shape in 6 years when its paid for.