Question about 1991 GMC Sierra
'not the original engine, standard 4x4 w/ dual exhaust
wher are #'s i might need to find replacment parts
The only thing you need to be concerned with is the amount of wires that go to the oxygen sensor, you state that it is not the original engine but I assume that you still are using the original loom and computer control system for your truck and if so you can reference the oxygen sensor connector.. Will have to use same oxygen sensor for original engine....Good Luck
Posted on Jan 07, 2009
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Posted on Jan 02, 2017
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