I have a 2005 Pontiac Bonneville GXp 4.6 Northstar V8 with close to 112,000 miles, and it just came up with a P2763 OBD code. The car is shifting a little hard, and just asking for a little help here.
1 you should have goten meaning of code from whoever scaned it..try any auto parts store
2 if over 75K may need tune up...computer gets confused if engine isnt running 100% and it controls shifting
3 and i assUme you have fluid in tranny..[full AND clean