Rev's up high when started - only cold weather

[CM Burns]

My moms 2002 Z71 Tahoe does this thing only in cold weather every year, when cold started, it revs up pretty high, 3K RPM, sustains, and after about 20 seconds it dies back down and starts cammin' until it warms up...

 

[YukonXL04]

Sounds like a intake manifold gasket to me. My uncle's truck just went through this earlier this year.