Update - took it in for final visit under warranty:
1. Leaking hydraulic serpentine tensioner - Replaced.
2. Leaking rear MRC shocks - Told this is normal. Apparently GM is a little tighter on replacements than in the early MRC years. The SA showed me their document which basically says to replace only if there is a visible run down the shock body or fluid drips on other components (e.g. lower control arm of barrel of wheel).
3. Coolant loss of about 1/2” to 3/4” from lower tank per 1000mi. Told this is normal evaporation.
Thanks for the input. I did check for codes before I took it to the dealer and none showed up.
Last edited by CRBWS6; 11-09-2020 at 11:56 PM.
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