Hello all...I have an 09 Escalade ESV that I bought a couple months ago. I had and have an electrical issue...the first time...I came to a stop sign...cluster started freaking out...check engine light came on...service stabili trac/suspension/abs light came on. Would not shift out of first and would not shift into Manual. Took it to a garage...they found a bunch of loosed connections under the truck by the transmission crossmember. They repaired that...all was well for two weeks until two days ago when it did the same thing to my wife. I then removed the battery/battery tested 12.6Volts and 686 cranking amps...all good there. I cleaned the connections, put it all back together...and all lights went off/shifts fine/no issues at the present time. After alot of research and reading...I've read that many have replaced the battery ground cable/positive cable and ground strap on driver engine side. What are your thoughts on this?? Thanks you in advance.