Dead battery and check engine light

[diyer2]

10 minutes ago, Cpl_Punishment said:

If your 2015 Sierra was junk, why did you buy another one? With customers like you, what incentive does GM have to actually improve their products? 

If jumping brands is what you are referring to it won't help IMO. No need to be rude because he likes GM products. GM doesn't have to care due to rising sales for 10 years. 

Look here https://gmauthority.com/blog/gm/general-motors-sales-numbers/gm-truck-sales-numbers/

Combined GM Truck Sales Numbers

Sales Results - USA - Trax, Equinox, Traverse, Colorado, Silverado, Avalanche, Tahoe, Suburban, City Express, Express, LCV, Terrain, Acadia, Canyon, Sierra, Yukon, Yukon XL, Savana, Encore, Envision, Enclave, SRX, XT5, Escalade, Escalade ESV, Escalade EXT

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Total
2020	168,148	168,148	168,148	135,911	135,911	135,911							912,176
2019	178,230	178,230	178,230	205,102	205,102	205,102	205,327	205,327	205,327	203,175	203,175	203,175	2,375,500
2018	160,671	171,771	230,517	201,348	201,348	201,348	184,187	184,187	184,187	214,239	214,239	214,239	2,362,281
2017	142,460	180,147	183,237	174,862	169,872	189,664	180,465	204,180	209,002	196,536	184,579	246,238	2,261,242
2016	138,122	155,863	177,458	182,435	166,646	173,012	204,366	177,359	173,745	188,505	184,529	228,452	2,150,492
2015	137,381	160,040	166,631	181,197	194,308	176,080	194,726	195,714	182,323	181,715	165,565	215,831	2,151,511
2014	97,161	127,839	146,345	148,181	165,304	163,300	166,676	171,302	145,281	145,899	148,371	188,876	1,814,535
2013	114,063	136,989	144,723	139,428	153,635	150,915	143,188	161,408	110,156	140,648	127,942	148,446	1,671,541
2012	96,983	119,795	128,473	121,058	140,938	138,547	126,123	137,552	118,399	122,751	114,702	162,582	1,527,903
2011	104,621	117,624	117,303	117,706	115,968	119,023	134,523	136,284	138,092	124,297	120,118	161,755	1,507,314
2010	80,976	74,573	107,258	104,901	124,615	113,293	115,611	106,653	106,350	120,328	107,579	156,972	1,319,109

 

 

[Brandon Boles]

1 hour ago, Cpl_Punishment said:

If your 2015 Sierra was junk, why did you buy another one? With customers like you, what incentive does GM have to actually improve their products? 

didn't say it was junk. I think GM has the best engineers in the business. Love the look. But little things like rubber window seals shouldn't be dry rotting after 2 years. Heated seats stopped working after 3. The quality of what they are putting into their vehicles are not as good as they should be.  Update: Got my AT4 back after 2 days in the shop. They couldn't find anything wrong with it. Reset the ECM. Seems to be working fine now. Time will tell.

[Pinnacle]

5 hours ago, Cpl_Punishment said:

If your 2015 Sierra was junk, why did you buy another one? With customers like you, what incentive does GM have to actually improve their products? 

People just dont learn I've seen that working at dealerships across all brands ford is this way too, just ridiculous but that's what they do.

[1997SierraSLT]

On 7/17/2020 at 10:12 AM, Brandon Boles said:

didn't say it was junk. I think GM has the best engineers in the business. Love the look. But little things like rubber window seals shouldn't be dry rotting after 2 years. Heated seats stopped working after 3. The quality of what they are putting into their vehicles are not as good as they should be.  Update: Got my AT4 back after 2 days in the shop. They couldn't find anything wrong with it. Reset the ECM. Seems to be working fine now. Time will tell.

Best engineers in the business.  Compared to what.....Chrysler?  

[Colossus]

On 7/17/2020 at 9:12 AM, Brandon Boles said:

didn't say it was junk. I think GM has the best engineers in the business.

Actually I think they may have some very poor engineers right now.  They need to tap into some Honda and Crapota engineers and get the longevity and reliability aspects improved, and perhaps tap into Chrysler engineers to improve the looks, because the 2019+ Silverado looks like total ******. 

[Tomato]

On 7/14/2020 at 11:55 AM, NHM25 said:

Hey guys, reposting from another thread:

 

7/6/20: I may have everyone beat on my timeline to frustration. Just purchased new 2020 GMC AT4 from Van GMC Buick in Scottsdale 3 DAYS AGO! The assembly date is June 20, 2020! It ran great the first two days... day 3, won't start. Total of 170 miles on the truck. Same issues that everyone has noted. Came outside, tried to open her up with the key fob and the battery was completely dead. Had to open manually. Push start did not function, no power whatsoever... basically a $65k brick in my driveway.

 

Connected battery to wife's Explorer and got the dash to light up but it wouldn't start. Tons of error messages. Kept trying to start it and it finally lights up... but was running very rough with knocking. This morning, started it up and it ran great. Dropped it off at dealer and they tell me there are no codes, it's running fine, the alternator and the battery look good. So I send them the videos below and a link to this thread... No word yet but will keep you all posted. So incredibly frustrating. Love the truck but now have to worry about this... what happens if it doesn't start when my family and I are in the middle of the woods camping/hunting? Ridiculous. 2020 could not get any worse. 

• Truck not starting when connected; charged for 20 min. https://www.youtube.com/watch?v=wEV5n6ZbkXU  
• Truck won't start after charge: https://www.youtube.com/watch?v=_78kJthwf58 
• TRUCK FINALLY STARTS: https://www.youtube.com/watch?v=8xEFiD66ZIM  
•  Truck starts, idle is off:  https://www.youtube.com/watch?v=xGd-6nNTU58&t=8s  

7/8/20: UPDATE: Dealer thinks they found the problem: Loose UBEC Bolts. There was a recent bulletin posted on 6/26/20 about this that may be the cause for this issue as a whole. Ask for document ID 5628169 or the following title for the GM bulletin: #PIT5756: Various Electrical Concerns (Inspect UBEC Bolts for Being Loose) - (June 26, 2020). SEE ATTACHED

 

Condition: Some customers may comment on any number of electrical related symptoms. The following are some of the known reported ones:

• no crank
• no start
• starter grinds or re-engages after engine starts
• SES MIL
• IPC guages sweep/fluctute and/or various IPC warning lights or messages
• High or low system voltage
• May have any of the following DTC's: B1325, B2750, B305D, B297B, C0049, P0562, P0700, U0100, U0101, U0102, U3006
• some of these concerns may be noticed with powertrain movement, like when accelerating or braking. 

 

Cause: These concerns could be caused by the X50A underhood fuse box bolts being loose. The X50A has built in indicators which pop up as the X50A bolts are tightened down, to inidcate the X50A is fully installed. In some cases, even if these green indicators are popped up, the bolts may still be loose. 

 

Correction: Inspect the X50A Underhood Fuse Block bolts and verify they are properly torqued to 53 lb in (6Nm)

 

Dealer stated that my box was indeed loose (that's what she said). Has not been able to replicate issues. Really hoping this is the fix for my truck and all of yours. Will update forum either way. Best of luck. 

 

UPDATE: 7/14/20. I have had no issues with the truck so far. I start and drive it every day. I really hope this was the simple fix; hopefully you guys give it a try and it works. You can do this fix yourself. I've attached the bulletin for everyone here. Good luck. 

BUELLTIN (1).pdf 1.02 MB · 36 downloads

Thanks for the fix!  Tripped both P0700 and U0100 today and found this.  Those 4 bolts were only at about 15 inch-pounds, and the green indicators were up.  Talked to my service rep at the dealer to cover my arse and not void anything.  Tightened them to 53 and the CEL was off at the next start!!!

[Colossus]

This is a safety issue.  This needs to be a recall

[bamorris2]

Thanks for posting the bulletin about those bolts in the fuse block. I checked mine and all four were loose. It took each of them about 3/4 of a turn to get them to the spec of 53 inch/lbs. I’ve been having some intermittent electrical gremlins and CEL codes, so we’ll see if this helps.

[Colossus]

This needs to be a sticky post. 

[NHM25]

On 8/11/2020 at 4:16 PM, Tomato said:

Thanks for the fix!  Tripped both P0700 and U0100 today and found this.  Those 4 bolts were only at about 15 inch-pounds, and the green indicators were up.  Talked to my service rep at the dealer to cover my arse and not void anything.  Tightened them to 53 and the CEL was off at the next start!!!

Good to hear. Hopefully this worked. I will say, I have not had a single issue with the truck since the dealer tightened the bolts. Went on a few big trips, camping, etc. It's running like a champ. 

[Tomato]

1 hour ago, NHM25 said:

Good to hear. Hopefully this worked. I will say, I have not had a single issue with the truck since the dealer tightened the bolts. Went on a few big trips, camping, etc. It's running like a champ. 

Same here - no issues since.  I haven't towed since the fix, but I am hoping this cures the trailering app gremlins I was encountering.

[453030]

My turn with this issue today.  Went to start this morning, completely dead.  No dome lights, no attempt to turn over.  Tried jumping off a small car and no dice.  Called roadside assist, they got it going after a few attempts.  Took to dealer, they did the slow charge test on the battery, says it is in amazing condition and had no idea what could have drained it.  Came to this thread, opened the hood and each bolt took several turns to tighten.  If you own this truck, check your fuse box bolts to preempt the issue.  Glad this did not happen to me camping.  8500 miles, BTW, and first issue.

[JohnTz]

Guys is there a video or write up on this? Is this the big fuse block under the hood? 

[Colossus]

52 minutes ago, JohnTz said:

Guys is there a video or write up on this? Is this the big fuse block under the hood? 

No, No, and Yes. 

[JohnTz]

Just checked mine. About 1 turn each bolt to tighten. Never had any problems but wanted to be proactive on this. Thanks for the heads up.