Hello

Pontiac g8 2008

6.0

When i crank the car while cranking there is abs stability then fast went off after engine start

No codes only u0140 in history and its clear easy then come back after 2 days

When abs stability flash while cranking the engine slow before being on little delay ( i hope understand )

Looks like there is a technical service bulletin for that issue on your car:

Service Bulletin Number:
PIT-4730A


NHTSA ID #:
10036550


Bulletin Date:
Tue, 06/01/2010


Failing Component(*):
110000 ELECTRICAL SYSTEM
114000 ELECTRICAL SYSTEM:WIRING
117000 DIGITAL INSTRUMENT PANEL


Summary:
BUICK/CADILLAC/CHEVROLET/GMC/HUMMER/PONTIAC/SATURN: ADDITIONAL DIAGNOSTIC INFORMATION FOR U0140 OR U0073. VEHICLE MAY EXHIBITS SOME SYMPTOM(*) AS DOOR LOCKS CYCLE WHILE DRIVING; INTERMITTENT NO START; SERVICE STABILITRAK DIC MESSAGE; SPEE

I am tying to find the details and corrective actions.

Thanx

But the stability light only while cranking its point something second then disappeared

Some people are reporting this issue is related to a bad battery ground cable, or bad battery ground cable connection. Check and clean the battery ground cable at the battery, and where it grounds to the engine block. May not fix your issue, but is easy and free to do, and couldn't hurt.

All the more reason to check the battery ground cable.

Im worry coz ur point but my battery volt is 12.6 pretty good by dic dashboard .

But i am worry coz the battert 70 AH

CCA 710

Acdelco .. This battery dealers put on it here !

Could because battery ?

The cars electrical can do strange things if it is a weak battery or connections not clean & tight.
As 2kg4u mentioned a ground check from battery terminal or adding a larger ground from the battery to body wont hurt either.
I prefer to not use the DIC for voltage readings as they are not always accurate.
Do you have a decent voltage ohm meter? If so, what are the volts reading, when car off, and when running?

To relieve battery worries, I would recommend that you have the battery load tested.
When it is time for a new battery, consider one of the newer more powerful styles of AGM type batteries.
They typically are 900CCA plus, are sealed and wont ever offer corrosion to terminals or wires.
Exide Edge makes reasonably priced ones, I just installed one in my 4x4 and run an Odyssey in the Buick.

My battery is new .. But it ia acdelco thats know after its not the good for 6.0 .

It is 710 occ .. Now i could say that i need more than 710 occ