09 GMC Sierra 5.3. 95k miles. 10 July 2020 I started having trac control off and service stablitrak light come on randomly with occasional power loss. GM checked everything (not) but due to high oil consumption (2 qts in a month) I had them change out the PCV w/valve cover (they're married), plugs n wires. Over the next 2 weeks my doors would lock/unlock on their own, seatbelt and airbag lights randomly on and trac/stablitrak still intermittently on and still dropped a qt of oil. Twice had to pull over due to loss of power, wait 5 or so minutes, restart, then drive. Sometime during week 3 my battery went dead after vehicle alarm randomly went off with multiple relays continually clicking. Disconnected and charged the battery. Then I thought, "too many electrical problems happening here". Decided to clean all negative battery cable terminals (battery, engine terminal and chassis terminal). Drove 10 miles with no repeats. Now, Oct 28th, 3+ months, still running great and zero oil consumption. Wow! But, it all started with trac/stablitrak fault indications and power loss.
