Information on the LS4, DOD, and the 4T65E-HD
#63
Have over 100k miles on 07 SS w/DoD no problems . On freeway level grnd. it will be in 4 cyl. mode at 80 mph cruising along until you hit an upgrade then back to 8 cyl. seamless operation. You should have no worries about it. Use good oil and change when down to 20-25% oil life.