rough start up when cold on 2002 GMC Yukon

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

by in Billings, MT on January 01, 2011
2 answers
ANSWER by on January 01, 2011
what are codes
ANSWER by on January 01, 2011
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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