Well, gee. That just looks like all kinds of spiffy fun. :bouncy:
my 2002 jimmy has 14 points, some jimmys/blazers have 16. but that is suspension and drive shaft.There haven't been grease Zerks on cars for years. They went the way of the horse and buggy. For creaky rubber bushings use RuGlide(available from NAPA) in an oil squirt gun with a long thin nozzle to get into the cracks and joints.
Purchase my CTS in Dec. and was hearing and feeling the same on mine, under warranty they had to replace the front bushing and a new strut/shockIf that's the case, then it sucks. I'm hearing a bit of creaking from my front suspension that sounds like it's asking for some grease.