I't's a 06 80k and a couple of bolts on parts nothing major... but it is a special edition and the dual mufflers do not have holes in them for water to drain so i'm thinking it may be the condinsation like blown said but i'm not sure.. And the coolant level is fine but i'm still running dex-cool
I wouldnt worry about it then.......if it is only at start up until the engine is warm then dont worry about it. If it does it all the time, you may need to look into this further........fwiw
98 GTP Coupe- 180* T-stat, GMPP Front Sway Bar, Dual Aeroforce Interceptor's, TDC FWI, TDC Taylor 10.4's, ZZP SS Plog, ZZP 3" SS catted DP, ZZP MPS W/3.4, AL104's gapped @.055, 3800Perf. PCM