I have three different manuals for our 2gm20f.Everyone of them talk about setting throttle at half position and pulling "engine warm up knob/lever". I have no idea what that is. Where is it connected at the engine? Should I have one? Doug
They could be referring to use of a single lever control. In that case there is usually a knob that you can pull when the single lever is in neutral. This allows you to advance the single lever acting as a throttle only without engaging the transmission.
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