Don't know how big Jenkintown is but a google search returned these Pontiac dealers:
http://www.eckenhoffautogroup.com/en_US/
http://www.faulknerautogroup.com/en_US/
(and this one had no URL)
Jenkintown Pontiac BUICKGMC
830 Old York Rd
Jenkintown, PA, 19046
PH: (215) 886-3500