Where can I get an emissions decal or the information from it?
My truck (bought used) does not have the stock radiator shroud so it has no
emissions decal. The truck is a Sierra SLE extended cab dually with the
7.4L engine, engine code "N." It appears the only source for the proper
timing, spark plug gap, etc. is the emissions decal. I have the factory
manuals and they refer me to the emissions decal. The GM part number for
the decal is 10120323, but it has been discontinued and no dealer has it.
Where can I get a new decal or the information that is on it?
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