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Re: 2003 Trailblazer 4.2 with a DTC P1271
Posted to Technical Discussion Forum on 2/3/2005

Hi James,

Would an info search and #PIT3138A, #PI01673 be of any help here.

Also this one, #PI01802A, has some interesting info on the pcm's performing diagnostics on some of the TAC system circuits.I was getting set to copy and paste it here but it isn't ... Login to read more.