On a 2009 GMC Sierra 1500 SLE. where are vacuum lines 1 & 2 located
For a TRUck. Went and got it read on CPU because chk eng lt came on. And was using extensive gas
See if there is a vacuum routing diagram under the hood. It should tell you there.
Alright CHKN now
Nothing. NOR in manual
You may have to call the dealer tomorrow and they can tell you.
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