Hey everyone, nice forum!!
I picked up a 2007 Grand Prix GXP a few days ago with 53,000 miles... Yesterday I was leaving for work and got few blocks over to a stop light. When it turned green... I pressed the gas, started going, then around 7MPH felt a shudder/jolt and then rapidly picked up speed.
This again occurred going to lunch.
I read around about the dreaded transmission issues affecting the GXP's (I really hope they're not as frequent as I've seen, anyone have a GXP with high mileage and original transmisison?)... but the take off rev clunk/jolt isn't exactly what I'm experiencing.... I accelerate and am not just revving sitting there, the car feels more like traction control is turning on for some reason and then then turns off causing a more rapid take off when regular power is restored. Aside from this I don't have any shift problems, grinds, flares, slips... etc...
I pulled the fuse for the ABS system last night which also effectively turned off TCS and Stabilitrack. I drove around 25 miles today and it has yet to jolt/shudder while starting from a stop. I also noticed the ABS sound I've been hearing and feel in the pedals when I first turn the car on, backout, and then start in drive isn't occurring either anymore.
Has anyone had issues with traction control like this? Usually when the sensors flake out the ABS/Trac Off lights will turn on.
Thanks!