2002 GMC Yukon Q&A

2002 GMC Yukon Question: rough start up when cold

pulled codes and are lean on bank 1 and bank 2 it only happens when its been cold out like zero give or take a couple degrees. Thanks for any advice -
Answer 2
Intake manifold is leaking. Once it warms up it has expanded enough to not have as bad of a problem cold -
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