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Whutdidyousay -> engine trouble codes (10/13/2007 2:53:51 PM)
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how do I check the codes on a '93 GMC jimmy with the vortec v-6? I was told to jump A & B in the OBD1 connecter under the steering wheel..... which one is a and which one is B? a pic would be greatly appreciated, Thanks in return, Eric
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