Silverado 5.3 & 6.2 Alternator Replacement + Diagnostic tips (2014-2018)
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- Опубліковано 28 вер 2018
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In this video I show the steps and procedures necessary to replace and diagnose alternator on the Chevy Silverado. These seizures or work on a GMC Sierra. GMC Yukon. GMC Yukon XL. I don’t like Escalade. And she had an ea in this video I show the steps and procedures necessary to replace and diagnose alternator on a Chevy Silverado. The procedures will work on a GMC Sierra. GMC Yukon. GMC Yukon XL. Chevrolet Tahoe. I hope this video helps you out, if it has please like and subscribe. shown below are the 5 different charging modes the ecu can put the charging system into. If you have any questions please feel free to leave something in the comment section. Thank you.
High Amp for Denali and SLE 170 AMP
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Standard 150 Amp
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Battery Sulfation Mode
The BCM will enter this mode when the interpreted generator output voltage is less than 13.2 V
for 45 minutes. When this condition exists the BCM will enter Charge Mode for 2-3 minutes. The
BCM will then determine which mode to enter depending on voltage requirements.
Charge Mode
The BCM will enter Charge Mode when ever one of the following conditions are met.
• The wipers are ON for more than 3 seconds.
• GMLAN (Climate Control Voltage Boost Mode Request) is true, as sensed by the HVAC
control head. High speed cooling fan, rear defogger and HVAC high speed blower operation
can cause the BCM to enter the Charge Mode.
• The estimated battery temperature is less than 0°C (32°F).
• Battery State of Charge is less than 80 percent.
• Vehicle speed is greater than 145 km/h (90 mph)
• Current sensor fault exists.
• System voltage was determined to be below 12.56 V
When any one of these conditions is met, the system will set targeted generator output voltage to
a charging voltage between 13.9-15.5 V, depending on the battery state of charge and estimated
battery temperature.
Fuel Economy Mode
The BCM will enter Fuel Economy Mode when the estimated battery temperature is at least 0°C
(32°F) but less than or equal to 176 degrees, the calculated battery current is less than 15
amperes and greater than −8 amperes, and the battery state-of-charge is greater than or equal
to 80 percent. Its targeted generator output voltage is the open circuit voltage of the battery
can be between 12.5-13.1 V. The BCM will exit this mode and enter Charge Mode when any of the
conditions described above are present.
Headlamp Mode
The BCM will enter Headlamp Mode when ever the headlamps are ON (high or low beams).
Voltage will be regulated between 13.9-14.5 V.
Start Up Mode
When the engine is started the BCM sets a targeted generator output voltage of 14.5 V for 30
seconds.
Voltage Reduction Mode
The BCM will enter Voltage Reduction Mode when the calculated ambient air temperature is above
0°C (32°F). The calculated battery current is less than 1 ampere and greater than −7 amperes,
and the generator field duty cycle is less than 99 percent. Its targeted generator output voltage is
12.9 V. The BCM will exit this mode once the criteria are met for Charge Mode. - Авто та транспорт
I have a 2015 Denali and I purchased a higher output amp from powermaster .It keeps throwing DTC error codes.Any idea on how to get the BCM to recognize it? Great video.
Thank you. Currently I am on aware of anyway for the BCM to except higher amperage alternators. I will do a little research and ask if you GM friends. I will get back to you
I just bought a higher output alternator because I added a sound system to the vehicle. Did you find a way for the BCM to recognize the higher output alternator?
Also, good video!
@@Whoa532 Any update with the issue? I just bought an high output alternator for my 16 gmc truck and would like to know as well.
@@ryaneboy101 did you try the battery reset?
I have never changed so much as a tire in my own car. But when I was hit with a $900 estimate for a new alternator on my 2017 Yukon Xl Denali, I started searching UA-cam to see if it was a do-it-yourself project I thought I could handle. $250!for the OEM part on Amazon, watching your video 10 times and voila! I had it changed in under an hour and saved myself $650! Thank you!!!
Mechanic shops are rip-offs in america. Alternators are not that hard to do
thanks for this awesome video! you have saved me so much time and I learned a lot about the charging system on my truck, keep up the good work!
This tutorial was compatible with my 2015 Suburban and I was able to swap the alternator out in about 45 minutes (that's including cleanup and putting away tools).
Only suggestion I would have is about the copper bushings. I had to use a curved-jaw Vise-Grip pliers to squeeze the bushing on the outside before I could move the bushings by tapping with a small tack hammer. It left a couple marks on the bushing, but I don't think they will be a problem.
The dealership wanted almost $800 to replace it, and my most trusted mechanic said it would be $720 at his shop. I was able to get the alternator from O`Reilly for $370, so this video saved me about $350. Thanks and keep up the great work!
Good job on the video! Precise and detailed instruction, no fluff. Thanks.
Thank you!
Great tutorial, makes it’s so much easier when I was initially over here over thinking it 🤦🏻♂️😂 thank you!
Great! Saved me lots of labor cost. I was intimidated to try
Aaron you the man! Thank you for this great how to get r done video (with socket sizes). Made a 3 hour job 1. Wish I could pay you.
thanks for the support. thats awesome! i have a link in the describtion for donating if you wish too!
Dude you made this process look so easy thank you 🙏
great video sure helped me a lot on my 2014 Sierra!!
Awesome video brother thanks a lot about to try my luck and try to swap my bad alternator on my Silverado next week thank you! Blessings
Excellent tutorial! Thanks for the tip on the bushings.
Video was an absolute life saver!! Subscribe button hit!!!
Very informative about the sweeping volt meter on dash. I just replaced my battery on my 2017 Silverado and thought maybe there was something wrong with my alternator. Thanks 😅
Noticed a voltage drop after installing new alternator and new battery. Thank you so much for the info in the description. I’ve been chasing my tail for a week. I had no idea the truck had multiple charge modes.
Don't have a Silverado, but still watching.
u the man! thanks for the support!!
@@AaronHinesAuto aaron , do you have a video for f150 2.7 L EcoBoost rear axle fluid change? Please sir
i am in the process of making one! funny you should ask, ill have it posted on saturday if work doesnt get to busy,
@@AaronHinesAuto lol I'm still wating for the xterra. But keep it up man.
@@jeffreyrogers8151 here you are good buddy, ua-cam.com/video/gXknItdy7io/v-deo.html
Thank You Very Helpful
Exelente muy bueno!gracias por el vídeo fue de mucha ayuda! salu2 👨🏫🙏😎😉
Thanks . this was excellent.
Hello Aaron, Thank you so much for the great video for replacing the alternator. Had the battery warning light come on while driving, and then Battery saver mode warning. I made it home just in time to be able to get my truck into the garage. I kept my truck running while I made room in the garage. Got back in my truck and warnings of power steering failure and stabilitrack failure the truck only allowed me to creep into the garage the rest of the way. Your video was perfect! Thanks again, Bob
Bob, mine just did the same thing today (2015 model). Looks like I’ll be changing mine out tomorrow
Great video it helped a lot thanks
TKS for the help
OF TO YOU GREAT VIDEO , I HAVE 2014 SILVERADO 5.3 MY VOLTAGE METER IS STAYING STILL ABOUT TWO NOTCHES PASSED 14 BUT THE ADVANCE AUTO SAY I NEED AN ALTERNATOR
Great info
A lot of very informative information here.....thank you for sharing !!!.
Great video! I’m looking to replace mine pretty soon. But wanted to ask you something first before I dish out 400 dollars. I was driving mine for about two hours and decided to top it off at the gas station. After two minutes with the key still in the ignition it says my battery is low and I needed to turn the truck back on. I just got a new battery back in the summer of this year. It has long start ups and the headlights flicker as I’m driving down the road. Is this the alternator or something else? Thanks!
My current situation: I have a 2017 GMC Sierra 1500 5.3L V8, I have a lot of accessories. For that I installed a dual battery setup with the keyline smart battery isolator and a marine deep cycle battery as the accessory battery. My question is, do I need a high output alternator for this system? Thank!
Would it be recommended to charge battery or not before connecting negative back? But this video was very helpful and easy instructions very helpful. Thank you! You save me the labor cost that the car dealer mechanic would have charge.
I’ve got the regular alternator, but with extreme radio demands and extra batteries there is a need for the higher power alternator. If I need more power from the alternator what must be done to enable this? If I install the Denali version will it function poorly or just throw warnings at me...can this be fixed by someone with hp tuner software? Increasing alternator power seems a very popular change. I can’t find Google info on this. I believe you, have the higher amp unit sitting here in a box, and now fear installing it. I’d appreciate your thoughts. Thank you for an awesome video-tapping the bushings out is brilliant, and not something I’d thought of!
On a 2018 denali, should the voltmeter on the dash ever drop below 12v?
Hello 👋 nice video I have a 2017 GMC Sierra 5.3 is a SLT and what is the difference of a SLE what alternator do I put the 150 or the 170 amp for better performance but like you said with no codes, thanks goood video your comment reply will be appreciated
I'm running a 3000w amp on my subs, I have a 2000 Silverado 1500 with 5.3 and my voltage metor sweeps back and fourth, my stock alternator is 100amp I purchased a 130-145 amp alternator. Is that too much?
Evening sir just seeing this video for the 1st time. I have a question in regards to that large black cover on top of the battery. A gentleman was replacing the battery, he disconnected the neg. & pos. cables the removed that cover and disconnected the 3 cables from the 13mm studs. When going back in with new battery he connected the neg.& pos. battery cables then the 3 wires on the studs but the stud with the 2 wires started to spark and got a little hot so he immediately removed the neg. from the battery. So then he reconnected the cables to the studs then the neg. battery cable. Was anything possibly screwed up going in that order because there was a burnt smell. Truck started fine.
How do I know which amperage alternator to buy? The auto parts stores all have 3 different amperages for my vehicle.
I have a 2011 1500 Silverado... When i turn on the AC the alternator stops charging and battery quickly drains down to almost nothing. Would that be the BCM or the alternator?
What are the 5 different output’s from the ecm?
hi
q\can I put
the 220amp altinator?
Thank you for the video, it answered some of my questions. I have a 2015 Sierra 5.3L, I keep getting the run around by the dealership to my battery drain. I thought maybe it was the Alt because after so long the battery no longer charges and just drains, but the headlights and nothing inside dims like it should with an Alt no charging. I have already replaced the battery once. I've only had the truck for a year. I have the issue of the truck turning off when I turn into a parking space & at low speeds. Also when I shut it off, get a popping noise, then get back in and try to start it, all power is dead and it won't turn over. Takes 3-4 times to trying to start it, then it turns over, no issues. That happens ever 2-4 months. Any help or advice is greatly appreciated!
Did you ever get this fixed? Mine is starting to do similar
@@cotx79 Yes. I left a comment on this thread previously. The negative battery cable was damaged and not making a full connection. Whenever the battery shifted and the wires inside the battery cable weren't touching, the truck turned off. I finally took it back to the dealership enough times, they put an electrical expert on it to trace every wire and cable. That is the only way it was found. Once the negative battery cable was replaced, it ran like new.
@@krisgilbert3415 I literally just got home from my mechanics place. And it was a loose neutral wire also! At least that’s all it is I hope. He took off the ground that comes off the battery and cleaned up the area on the frame and reconnected it as well. The wire on the battery was so loose. I’m surprised it didn’t just pop off. I remember I had taken my truck to get an amplifier installed. Looks like they didn’t reattached the wire appropriately.
What codes were related to this ?
Great video. Have a question I'm running a major system n my 2018 Silverado 5.3 and just got a 1 wire alt. for cheap and gonna install it. I won't be able to hook up the plug nemore. So the pcm will not do all these type of charging stats. I believe it will just stay at 14 or so. Will that b ok on my truck and is there a way to make it so my engine light will go off. The guy selling it to me said there is a way but didn't know for sure. U seem really knowledgabe on this thanks sir. N great vid
If it’s a one wire alt. The one wire only needs 12v. And the system should charge. To get rid of any codes that may occur, you will need to delete them by using hp tuners. That “should” work. However I’m not sure if the ecu or bcm will disable some functions of the vehicle if that plug isn’t in. Let me know!
@@AaronHinesAuto sweet n thanks mann alot and I will let u know sir
same procesure fir the 4.3? it looks identical?
I have a 2019 Suburban 5.3 LT. My battery keeps dying 1 or 2 times a week. Two time tested the battery and dealer said the battery is good. At autoshop Checked the alternator, and charging power shows 12,4 . They said alternator should be replaced. So, went to dealer, but they said if there was a problem with alternator, I would see the red battery sign on my dash or power saving mode sign. And also dealer said problem is not alternator but something is draining the battery when car is off.
So, I don't know who is right: Autoshop or dealer. Is there any idea?
I am just now digging into my 2015 Silverado LT and same thing seems to be happening. At first blush the alternator and battery seem okay but, this morning got in and display screen said "Service theft deterrent system." This is the only thing using battery when vehicle is off. I am not at this step yet, I still have to confirm battery and alternator are good before I start looking for unicorns.
Would their be the same for the 4.6 v6?
Would an alternator cause the truck to shut down when putting load on the ecu? I don't wanna take my truck to dealership to pay 490 to tell me my alternator is bad.
I haven’t heard of that before. check engine light on?
I had a arc when changing now truck want start no dash lights some stuff will work no power windows only one head light
Help I think I did get the higher amp by mistake
Great video. I’m not really a fan of the new denso alternator they use. I’d much rather see the Delco Remy they used to use.
Either Am I. Thanks!
Jam up!
ANYONE HAVE AN ISSUE GETTING THE LONG SCREW TO BITE WHEN DRIVING IT BACK IN?
nevermind fellas ROOKIE mistake lol
@@brandoncouriwilliams8491 ur not the 1st lol
MR HINES! EMERGENCY QUESTION. THE BOLT BELOW THE LONGER ONE TAKEN OFF, I found it unscrewed about to fall off. What is it!? I cannot screw it back in.
i checked out a 14 5.3 just now. i see what your talking about. on the motor i looked at there was no bolt there but there were threads for one. do you have a 6.2?
I’ve never heard more amps can hurt your vehicle.
Ain’t nothing worse then your bearing going instead of the actual Alt, Sucks , 2014 Sierra Slt 4x4 5.3 bad bearing noise took screwdriver and listened on the Alt and can hear the exact noise you hear outside the truck . Maybe trying to buy a Referb or something, 372$ for a brand new