my SPF2116 spit out the eft rear parking brake actuator. the actuator resembles a brake wheel cylinder. i can only guess that a screw came adrift and got caught between rotating assemblies. the attaching end flanges (2) got broken off . these flanges were countersunk for flathead allen screws that held the actuator to the (screwed into) upright. i recovered the actuator and have been trying to obtain a new one from SPF in Irvine Ca. i guess the factory did not recognize the detailed drawing i sent ( i am a technical illustrator by trade) or the photos i sent because sure enough they sent the wrong part. so last night i started searching the net and found the GM makes a "AC Delco rear parking brake kit 179-2060" that sells on E-Bay for around $80 to $90.00. so this AM i called the local Chevy dealer and they will special order the kit for $163.66. the photos of the kit do not show enough detail to determine if the actuator shown is the one i need. so, i'm asking SPF owners whop might know about said actuator. dont know if Chevy special ordered actuator kit is returnable or if kit on E Bay is returnable. always use loctite?