Refresh parasitic draw

jaxcam02 · July 15, 2023

Something happened Thursday night to begin a stage of parasitic draw. I came out Friday morning to a dead battery on a 1 year old truck. Pulled codes today and this is what I got. Wondering if anyone else has had similar thing. I'm guessing since module has shorted.

silveradosid · July 17, 2023

i read a blog on a 2021 yukon that had the same thing as you and the same codes. dealer charged the battery and checked everything and found no problems, he is driving the yukon and it hasnt done it again

newdude · July 17, 2023

On 7/15/2023 at 3:11 PM, jaxcam02 said:

Something happened Thursday night to begin a stage of parasitic draw. I came out Friday morning to a dead battery on a 1 year old truck. Pulled codes today and this is what I got. Wondering if anyone else has had similar thing. I'm guessing since module has shorted.

Did the vehicle attempt an update/did it show update failed on the radio screen? There is a known issue with one of the latest OTAs getting the truck stuck in a power draw situation and killing the battery.

The C1555, that doesn't come up as a code in GM land at all so I'm thinking your reader didn't identify it correctly or can't identify what is actually there. The other three are all low voltage codes.

Edited July 17, 2023 by newdude

jaxcam02 · July 17, 2023

I updated manually a few weeks ago so no update available. Every night after charging the battery since it originally happened I've come out the next morning to dead battery. Whatever it is is drawing more than 6v 2amps that my battery tender puts in.

Bikerjon · July 18, 2023

Time to take it to the dealer for a battery draw and load test. Batteries can fail prematurely.

Jus Cruisin · July 18, 2023

Time to drop it off with Beck or Gordon... They have the equipment to locate the problem circuit or confirm your battery is bad.

jaxcam02 · July 18, 2023

Update, they replaced the battery yesterday because the old one had dead cells and tried to get me to pick it up. I told them to let it sit over night and test it again in the morning. Low and behold, I got a call from them first thing this morning and the battery is so dead they couldn't even unlock the doors with the key fob. Will keep this thread updated with what they find.

jaxcam02 · July 18, 2023

Just called for a update. They have basically been searching all day for the draw and they think they narrowed it down to the tailgate latch switch. Which now that they say something about it, I do remember the tailgate opening on its own once last week before this all happened. It also happened one of the times I had to jump start the truck once it started to get power into the battery. Hopefully that's it.

Bikerjon · July 18, 2023

Good to know. Please keep us updated.

Mshawn · July 19, 2023

I’m very interested in this thread. This seems to be a problem on these newer trucks. I’m a tech, although I’m not at Gm right now. I try to stay up to date on These electrical problems. Please keep me up to date.

Edited July 19, 2023 by Mshawn

Jus Cruisin · July 19, 2023

9 hours ago, Mshawn said:

I’m very interested in this thread. This seems to be a problem on these newer trucks. I’m a tech, although I’m not at Gm right now. I try to stay up to date on These electrical problems. Please keep me up to date.

You can't just park a vehicle and leave it sit for 3 or 4 weeks at a time without the possibility of a dead battery. The C7 Corvette would kill batteries really fast. I always would plug in a Battery Tender when I parked mine. My 2021 F150 and Explorer would also go into deep sleep quickly. I plug my Camaro into my Battery Tender (wired a quick connect in the trunk-trunk mounted battery) when I'm not driving it.

KARNUT · July 19, 2023

The two vehicles of different brands I owned had aftermarket alarms. After two weeks of non use dead batteries. The one that’s left gets driven once a month. It has a tender. The rest get driven at least once a week no problem.

jaxcam02 · July 19, 2023

Hmm, I must be missing some kind of context with these last few comments. But I just want to make it clear that my truck is driven daily and this parasitic draw event happened over a single night after driving it the night prior.

jaxcam02 · July 19, 2023

Just got a call from dealer and they said they did a BCM update and video processing module was staying awake when the vehicle was off. We'll see if thats actually the final word on this.

jaxcam02 · July 20, 2023

Issue resolved.

The dealer updated the BCM since it was releasing the tailgate uncommanded and reprogrammed the video processing unit to prevent it from staying on. Unsure why it just up and decided to stay on originally but the reprogramming worked. Truck started up just fine this morning so I believe this is taken care of. I did get a brand new battery out of this so that's one more year I don't have to purchase one thankfully.