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Old 12-23-2012, 04:20 PM   #4
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Drives: 2012 LS3 1SS/RS Vert
Join Date: Dec 2012
Location: Hamburg
Posts: 371
Okay. It sounds like it should have the 2.9 EFI in it. I had an 87 that had similar problems. Mine wound up being an O2 sensor. Mine was intermittent and found if you disconnected my sensor the truck ran like that. Another 87 if you did that it killed the engine. Good luck
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