Originally Posted by tilley88
OK, went to shop and retrieved codes before startup-C12, H97, & H71. Disconnected battery for a few minutes, hooked it back up, started car, and let it run for a few minutes. It started well and ran well for a few minutes, SYS light would come and go, then she started crappin out. I pulled codes again-C72, H72, H97, H71. I noticed fresh antifreeze on top of the water pump so I got a leak somewhere. I'm really startin to think it's the opti.......it really sounds like an electrical crap out in my experience, especially when you give it some rpm's.
I agree it sounds like the opti. But codes IIRC are for speed sensor and gear selector
. Opti code is 36 IIRC. Hopefully you will get grumpy or vetteoz to chime in here. Far too many here that are better at the late codes than I am.