Same system here
Linux 2.6.9-55.ELsmp x86_64
Code:
which update-pciids
/sbin/update-pciids
Login as root to run update-pciids or use full path/sbin/update-pciids
Otherwise goto
Linux PCI ID Repository and download file using wget :
Code:
cd /usr/share/hwdata/
mv pci.ids pci.ids.bakcup
wget http://pciids.sourceforge.net/pci.ids