Originally Posted by GMCSonoma
I ordered the series 3 plenum...I'm gonna to try & match it up with the original plenum & see...
If not, I won't worry for now, as my Bonneville is still under warranty, and I can return the plenum if I desire without issue...
Thanks for all the answers though!!!
I'd like to know more about the whole modification process! You all should advertise it somewhere!!!
I inspected both Ser 2 & 3 plenums... I see where the series 3 eliminates the coolant passage to the TBI...
They ARE not interchangeable though...just an FYI in case anyone ever asks!
I'll keep you all in mind when my warranty is up!