Original battery? If so, it's getting close to being four years old and it would be good time to start by replacing that and see what happens.

 

Yes, original battery, but I had it tested and they told me it was good. Can a battery be bad even if it tested good?

 

Yep. It can have a weak cell an still test good. My son-in-laws suburban had a similar issue a few weeks ago. Tested good twice. He installed a new AGM battery and all was great since. It was a 2019 suburban with 66,000 miles.

 

Ok I’ll try that. Thank you

 

I would test to see if it's the problem. Voltmeter across the battery when you crank, if the voltage stays above 12V or so, the battery is likely not the problem.

If the battery voltage doesn't drop below that, then I would start with disconnecting, cleaning both sides of the connection, and then reconnecting the main power and ground cables between the battery, engine, frame and starter.

 

Check all grounds all connections are clean not blocked I know 14-15 they had ground issues with too much sound deadening in A pillars 🤦‍♂️🤷‍♂️

 

Could be battery got 61/2 years out of mine but that’s not the norm anymore 😂

 

Replace the negative battery cable. It can look fine, but it is a known issue. Did all the ground cleaning on my 17 when I had electrical issues and some no starts but it didnt help. as soon as I replaced the cable evrything worked perfectly.

 

I have the same problem with my 2020 Chev Z71 RST has only 55000 Mi on it brought it to GM Dealership they said there is a for hour dienastick fee will cost about $700 I put a New battery in my truck after 4 Days The Battery was Dead went back to were I bought Battery they said battery was good but they Put another battery in my truck after a Week it was Dead I can't figure out the problem and I can't afford to bring it to the Dealer I'm already paying $900 a mo. Truck pymt my next thing to do is leave the truck at the Dealership and let GM Financial Repo it I still owe $44000 on it Sad the Dealership won't Help us out... If I can't get any help buy next week I'm turning it in I'm done 40 Years buying GM I'm done

 

^^^Holy crap!!! Almost five year old truck, owe $44K and pay $900/month? I’m speechless… 🤷‍♂️

$700 diagnostic fee? You need to find another dealer. Or go to an independent shop. Your truck is probably not under warranty anymore, so no need to pay dealer fees.

 

I'm already paying $900 a mo. Truck pymt my next thing to do is leave the truck at the Dealership and let GM Financial Repo it I still owe $44000 on it Sad the Dealership won't Help us out... If I can't get any help buy next week I'm turning it in I'm done 40 Years buying GM I'm done

I can tell by reading your statement, you have no clue how repo's work.
Think very carefully before you do what your saying, because you will not get out of that loan.
Step one: You turn in truck for repo
Step two: GM will take it auction and sell it to highest bidder
Step three: It WILL sell for quite a bit less than what you owe
Step four: GM will then come after you for the difference, and they will win that battle.

You can't just drop a vehicle off and wash your hands of the deal.
You signed Loan papers to take on that loan, and are obligated to pay it back.
Turning in your truck does not relieve you of that obligation.

^^^Holy crap!!! Almost five year old truck, owe $44K and pay $900/month? I’m speechless… 🤷‍♂️

No kidding!
Can't imagine having that kind of payment on a 5 year old vehicle.

 

story doesn't sound right... it comes across to me as being written by someone much younger than a 60 yo (and he'd have to be at least that age to have been buying gm for 40 years).