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I just had my entire cooling system drain and filled at a pro shop and this is the case with mine as well. No harm no foul. It’s even an aftermarket system now. Just a little top off. Usually a seasonal thing I’ve noticed when it gets colder. Probably evaporation of sorts
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2020 Camaro LT1. Bought 10/2020 | GM PERF. CAI | GM Muffler Delete (Performance Exhaust 4” tips). | SOLD 1/2022|
2018 ZL1 Summit White | Bought 1/2022 | PDR, Recaros, Carbon Dash, WeaponX Hx System, Apex SM-10 in ZLE fitment w/PS4S
Mods after Warranty “Imma keep it stock”  |