2000 Buick Park Ave shuts down while driving. No codes. Seems to lose electric first. Maybe heat?
265,000 miles. Park Ave in outstanding condition (except for the following problem).
Prior to this, no issues, no codes, no nothing but a good car.
-Drove 20 miles, ABS light came on, went out about a minute later.
-Few minutes later the Volt light came on, went out about a minute later 3-5 miles.
-A minute later all Dash Lights and Gauges went out.
-A few minutes later it acted like it was missing or it was sputtering poor acceleration, a minute later that went away and it ran good and able to accelerate good, still no dash lights or gauges.
-Turned blinker on and all lights and gauges came on.
-A minute later they went off
-Blinker thing happened three times.
-During de-acceleration turned blinker on and the car killed.
-no crank no lights no nothing.
-Got it home, put charge on the dead battery and the car started.
-Same thing happened but in 10 miles.
-Brought to a shop, no code, low battery, load tested battery it's good, charged battery car started, no codes, 13.1 at the battery 12.5 inside the car with all the stuff running.
-Put another Alternator in, gave 14 at the battery.
-SAME THING happened this morning.
-Crank it nothing happens, charged battery started the first 2 occasions not the 3rd time.
-Cranks attempts to start then shuts off, like a security issue.
-We think it happened all three times with the same ignition key.
I GOT NOTHING, no codes. My mechanic is working on it and I thought I would do some digging, the only spot he did not check yet is under the back seat. Not sure if this is a heat issue or what is going on. Any help would be appreciated.