LS4 Performance - please help yall

got car back with new motor again after about a week i have these problems..
usually when i hit a bump abs,tc,stability control lights come on, when this happens horn will beep and radio will get really loud for a second. also sometimes after this happens the car will be stuck in 3rd gear and i cant shift up or down even with tapshift.
-cruise control doesnt work at all
-will not start half the time.
if i wiggle the black wire that connect under the positive wire/eyelet on the starter then itll start up right away.

i ran a tech 2 scanner before this when only the abs /tc control lights were coming on and it said yaw rate sensor.

havent found any odd connections.
any advice?

got car back with new motor again after about a week i have these problems..
usually when i hit a bump abs,tc,stability control lights come on, when this happens horn will beep and radio will get really loud for a second. also sometimes after this happens the car will be stuck in 3rd gear and i cant shift up or down even with tapshift.
-cruise control doesnt work at all
-will not start half the time.
if i wiggle the black wire that connect under the positive wire/eyelet on the starter then itll start up right away.

i ran a tech 2 scanner before this when only the abs /tc control lights were coming on and it said yaw rate sensor.

havent found any odd connections.
any advice?

Pour gas on it, light match, collect insurance check :jest:

All kidding aside, take it back to the dealer and let them sort it out. Sounds like some kind of wiring or computer related issue.

The problem with the ABS, Traction Control and Stability Control is just a bad wheel speed sensor, or some other connection by one of the wheels. Check for a pinched wire by the hub and all that.

When the vehicle doesn't know how fast each wheel is spinning all of those functions cannot work.

How do I know this? Real life experience!

The trans getting stuck in third is an indicator that the TCM has failed/is failing. Experience.

The other warning lights can be tied to that, bad battery/connectors, bad speed sensor/wheel hub, etc. Multiple experiences.

The only thing I can think of that is connected to all of those systems is the BCM or body control module. It's under the dash to the left of the steering column. The radio thing as weird as it seems is most likely just the "speed compensated volume" feature as your speed sensors are probably bad. I've gone through 3 sets of hubs because of the speed sensor.

I had the same issue this is what was wrote on my service paper "abs light on found c0197 yaw rate circut performance, ebcm code c0035 wheel speed sensor, ebcm has internal fault" With the ebcm they went through 2 of those because the 1st one gm sent had internal issues also.

The bcm I think will became our major electronic headache as the cars age

Why are you going through the trouble? :confused: Take it back in.

found out it was a ground.... its perfectly fine now lol