Thanks, Uzzy
thought using 'Electra' (And having a Buick-Volt) would be sorta inevitable...
and Buick's higher price-range would help with the higher initial costs for the plug-in system
&
if you see this reply - the Readers'Digest version is in post#2

but
here's a sorta updated list (borrowing most truck-stuff & platform names from
HVM's recent post, any mistakes are mine)
Buick /pkgs___________
Pk.Ave /Bonneville
___(Zeta lwb sedan)
Insignia /GrandPrix
___(Epi2 sedan)
Enclave
___________.(Lambda CUV)
Electra
____________.(Lux Volt)
Saturn /pkgs_________
Ion /Tempest,Excelle
__(Delta2 sedan)
Astra /LeMans,Excelle
_(Delta2 hatches)
Vibe / ?,Excelle
______(Delta2 MPV)
Corsa / ?,'B'
_________(Gamma2 hatches)
Atom / ?,'B'
_________(A/B-class hatches)
Vue / -,Century?
______(Theta CUV?)
Pontiac /pkgs________
G8 /LeSabre?Riviera?
_(Zeta swb 4-door/vert)
Torana /Riviera
______(Alpha? 5-door/Cabrio)
Solstice /Sky?
_______(Kappa2 coupé/targa)
GMC /pkgs____________
Yukon /Denali,H9
____(GMT-900 fullsize SUV)
Sierra /Denali,'H'
____(GMT-900 fullsize p/u)
Envoy /Denali,H7
____(GMT-700 midsize SUV)
Sonoma /Denali,'H'
__.(GMT-700 midsize p/u)
'G-MaC'/Denali,H5
__.(? Jeep-replacement)
__.''
______________.(? ^ compact p/u version)