2014 - cranking kills DIC, full charge battery issue

[Spendit]

Hello - would anyone know or have experience with cranking activation causing DIC to go blank. Recently when trying to start the 5.3L I get a click, sometimes 2 then the DIC blanks out and I have to jump start to get engine to fire. Even after a battery replacement this intermittent issue leaves me stranded - yesterdays attempt to jump lead to truck dying once putting in gear (2 times) - Hoping someone has experienced this very problematic issue, ill build the story below.

 

No issues to date with starting, Ive had the vehicle for 14 months now. A few days back headed to store and everything is dead - no chimes, no lights, nothing. Jump box in place, fire up truck drive to complete errand  - volt meter at dash right on 14 volts. Trying to head back home, first try to crank, one click and everything goes dead again. Jump start, normal readings on return trip home - put trickle charger on all night (not much current draw). Fires right up next day off to work. Let sit 10 hours - use DMM and read 12.6V at battery before cranking, starts right up and DMM shows 14.6V with engine running. Let sit some hours and DMM at 12.4V, let charge overnight, fires right up. Let sit at work lot for 9 hours, DMM reading at 12.6V before cranking, try to ignite engine, clicks once but fires up - stop on way home for new battery. All fixed right - NOPE

 

After new battery installed all readings look good. 9 days later first thing in the morning, one click like dead but fires. Set at work lot all day, DMM reading before cranking at 12.5V - try to start nothing - jump start to get to appointment. After 30 minute appointment, no fire DIC dead again at key on - jump start put in reverse engine dies - jump start #2 put in gear engine dies - jump start #3 drive home with jump box attached to battery. Each time engine started I got a DIC message to put drivers window down and back up before I put it in gear - window was down, activating it up makes message go away. No other faults at DIC - no indication of weak battery and all normal until 10 days ago??????

 

My typical start sequence is: turn key to on position, wait for 5 charms then start engine - zero problems in 14 months until last 2 weeks - dash volt meter has always been hovering around 14volts, so charging system not in question. Seems every time I connect a jump box, charger or remove and re-install cables I can get vehicle running normal - until next start up. I read about bad ground cables - tough to find out there right now

 

Looking for help - ideas - experiences with similar issues - next steps

[diyer2]

Check into battery cables.

I believe this was an issue of bad battery cables.

 

[Spendit]

3 hours ago, diyer2 said:

Check into battery cables.

I believe this was an issue of bad battery cables.

 

Thanks - That's a problem cant find a replacement one - lots out there but none that match at posts.....might have to 'fabricate' a temporary parallel lead

[Spendit]

Anyone have the correct part number for the negative battery cable, as 84319729 sent from GMpartsgiant is not compatible.

 

The engine side terminal is flat/straight on the vehicle and the part sent has a 90° bend. P/N 23138970 that is on vehicle is no longer available, obsolete....maybe they changed the mounting location to accommodate the new P/N - anyone have a manual or experience?

[Tahoe02]

Have your dealer run a part # check for that part. Should show any Dealer with that part in stock in the US. 

[Spendit]

Update - day 10 after replacing negative battery cable and things are still good