I've got an '01 Silverado 4x4 Stepside with the 5.3L and it only just turned 48,000 miles. We don't get out very much anymore due to medical reasons and I only put on between 5,000 or 6,000 miles a year. Right now I'm getting ready to change all the fluids. What should I use. I really can't afford a type like Royal Purple, but I want to take real good care of my baby. I need a 80w-90 gear oil for the front diff. I need a Synthetic 75w-90 for the rear. I live in Idaho and was wondering if running 5w-30 Motor oil is ok or should I be using something different? I was given a quart of Lucas' synthetic Oil Stabilizer and was thinking about going to a synthetic. What do you think? I'm thinking about going to Dexron VI for the tranny with just a filter and fluid change (No Flush) and am going to use GM's Auto Trek for the Transfer Case. I would really appreciate any help you could give me! Thanks
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