I have a 2006 g6 gt 3.5l coupe. On occasion, when there is snow I will lift my handbrake and slide my car. One day out of the blue I tried to do this and it wouldnt slide. Figured out that the handbrake was not working on the left rear wheel. I took it to the shop and they replaced my caliper. Still didnt work. Brought it back, they replaced the caliper again. Still doesnt work so I've given up hope for that mechanic. The mechanic did say that when the handbrake is lifted, he can see the cable and the mechanism on the caliper move properly. I cannot confirm this however. Both wheels seem to lock up the first time I lift the handbrake after getting the caliper replaced but then the second time I lift it, only the one wheel locks up. I've seen posts saying that the handbrake probably froze because it wasnt being used but I lifted my handbrake every time I parked the car. I'm stumped, my mechanic is stumped so if anyone could tell me what is going on, that would be great.