Dead battery from not putting in park? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

PGG · 01-18-2019, 10:13 PM

I have a 2016 Suburban LTZ that has 55k aprox miles on it. I put a new AC Delco factory matched replacement battery in mid last year. Anyway today I guess I was rushed and had only put the truck in Reverse then turned it off. I did have the parking break on. After work today I was totally dead first I thought it was my fob battery but the truck battery tested dead. Should this drain a very new battery like that in 7-8 hours? No lights were left on etc. Also now that I have it running its been idling for a hour how long should I let it charge running? Should I put a charger on it overnight would that be better?

Thanks sorry these are likely basic knowledge questions but this new modern **** has me lost. My 72 K5 can sit for a week or a month and fire up it doesn't care what gear I left it in and has no battery for the key... Push button arg.

Thanks in advance for the advise. PG

**WorkinLonghorn** · 01-19-2019, 12:58 AM

I don't know about why it happened but I do know that you should put it on a trickle charger overnight rather than let the charging system of the truck charge it at a much higher rate which is hard on the battery I think. Also will wear the alternator.

PGG · 01-19-2019, 01:11 AM

Quote:

Originally Posted by WorkinLonghorn

I don't know about why it happened but I do know that you should put it on a trickle charger overnight rather than let the charging system of the truck charge it at a much higher rate which is hard on the battery I think. Also will wear the alternator.

Thank you for your time I will go put the charger on it! Have a great day. PG

**Mr_Rich** · 01-19-2019, 02:22 PM

I was curious about this. Could it be that because transmissions in the newer trucks have electronic shifting rather than manual linkage that it left a circuit closed where current could continue to flow in the system of the truck and run the battery down?

Bimus · 01-19-2019, 08:23 PM

I had almost the same thing happen when eating at a fast food place I left the ignition on to work the windows when time to go not enough volts to start the car also 2016 Subaru . The manager said this happens daily and they have a quick start he will bring out . At home I load tested the battery and it showed to be fine the original battery is 550 cca when I replace this battery a higher cca will be going in .

**truckdude239** · 01-20-2019, 01:33 PM

if the truck is not all the way into park the truck will not shut down completely and will drian the battery

franken · 01-20-2019, 11:23 PM

Maybe you should put it in park, check current flow, then reverse and the same. The internet can't tell you what your truck is doing. Only you can.

PGG · 01-21-2019, 02:05 AM

Thank you David very much appreciated that is what I was wondering. Have a great day. PG

I guess the internet can tell me what was wrong with my truck after all!

Quote:

Originally Posted by truckdude239

if the truck is not all the way into park the truck will not shut down completely and will drian the battery

01-18-2019, 10:13 PM	#1
PGG Registered User Join Date: Mar 2015 Location: Fort Worth Texas Posts: 279	Dead battery from not putting in park? I have a 2016 Suburban LTZ that has 55k aprox miles on it. I put a new AC Delco factory matched replacement battery in mid last year. Anyway today I guess I was rushed and had only put the truck in Reverse then turned it off. I did have the parking break on. After work today I was totally dead first I thought it was my fob battery but the truck battery tested dead. Should this drain a very new battery like that in 7-8 hours? No lights were left on etc. Also now that I have it running its been idling for a hour how long should I let it charge running? Should I put a charger on it overnight would that be better? Thanks sorry these are likely basic knowledge questions but this new modern **** has me lost. My 72 K5 can sit for a week or a month and fire up it doesn't care what gear I left it in and has no battery for the key... Push button arg. Thanks in advance for the advise. PG

01-19-2019, 12:58 AM	#2
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,883	Re: Dead battery from not putting in park? I don't know about why it happened but I do know that you should put it on a trickle charger overnight rather than let the charging system of the truck charge it at a much higher rate which is hard on the battery I think. Also will wear the alternator. __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.

01-19-2019, 02:22 PM	#4
Mr_Rich Registered User Join Date: May 2006 Location: Yucaipa, Calif. Posts: 790	Re: Dead battery from not putting in park? I was curious about this. Could it be that because transmissions in the newer trucks have electronic shifting rather than manual linkage that it left a circuit closed where current could continue to flow in the system of the truck and run the battery down? __________________ 1989 K1500 Chev. EC Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit. 2009 Hummer H3T 3.7L 5M (sold) 1997 K2500 Chev. EC 7.4L/ 4L80E 2018 Dodge Ram 2500 HD R/C

01-19-2019, 08:23 PM	#5
Bimus Registered User Join Date: Dec 2018 Location: Farmington NM Posts: 112	Re: Dead battery from not putting in park? I had almost the same thing happen when eating at a fast food place I left the ignition on to work the windows when time to go not enough volts to start the car also 2016 Subaru . The manager said this happens daily and they have a quick start he will bring out . At home I load tested the battery and it showed to be fine the original battery is 550 cca when I replace this battery a higher cca will be going in .

01-20-2019, 01:33 PM	#6
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,237	Re: Dead battery from not putting in park? if the truck is not all the way into park the truck will not shut down completely and will drian the battery __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

01-20-2019, 11:23 PM	#7
franken Registered User Join Date: Jun 2013 Location: Somewhere Posts: 3,122	Re: Dead battery from not putting in park? Maybe you should put it in park, check current flow, then reverse and the same. The internet can't tell you what your truck is doing. Only you can.



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