Jump to content

Charging system

Boomer1974!
 Share

Recommended Posts

Boomer1974! Enthusiast

Boomer1974!

Posted
Posted (edited)

I have a 2012 Chevy Silverado 1500 with the 6.2L. My voltage is 14.45v running around town but when I drive it for long distances or I let it idle for 10 minutes or more it drops to 12.67v and stays there. Yesterday I drove it for an hour and it dropped to 12.67v got to my appointment and when I came out 45 min later it said start vehicle battery low so I ran it for 20 min and shut it off and about 2 hours later it was still at 12.67v. I have put a 160 amp alternator on it from gm this is my 4 or 5 alternator. Any ideas?

Edited by Boomer1974!
Sharpz Enthusiast

Sharpz

Posted
Posted

Make sure the belt tensioner is up to snuff.  A loose belt can cause all sorts of issues.  Also make sure your terminal connections are good and clean, take them off and check the inside where it meets the battery. 

Sharpz Enthusiast

Sharpz

Posted
Posted
21 hours ago, Boomer1974! said:

Thank you for your reply but those have already been checked and secured and tensioner is good.

considering you have replaced this alternator 5 times, you might want to get those rechecked.  Alternators have a built in voltage regulator for how much amps they put out, so very little on the truck body side can effect its short life span that you are experiencing. A dead short is possible,  or a parasitic draw but I wouldn't expect that to ruin your alternator.   You can try to remove a fuse at a time of non essential things like heater or ac, radio etc and see if this helps with your issue. If it were me based on how many miles you have run, and the amount of alternators you have put in,  I would replace the belt tensioner with a new one, if it doesnt change your issue, take it back. 

swathdiver Senior Enthusiast

swathdiver

Posted
Posted
On 4/13/2021 at 7:53 PM, Boomer1974! said:

I have a 2012 Chevy Silverado 1500 with the 6.2L. My voltage is 14.45v running around town but when I drive it for long distances or I let it idle for 10 minutes or more it drops to 12.67v and stays there. Yesterday I drove it for an hour and it dropped to 12.67v got to my appointment and when I came out 45 min later it said start vehicle battery low so I ran it for 20 min and shut it off and about 2 hours later it was still at 12.67v. I have put a 160 amp alternator on it from gm this is my 4 or 5 alternator. Any ideas?

The computer controls the output of the alternator and it seems to me that you need a new battery regardless of how it tests out.  These computer systems don't take kindly to aftermarket parts so make sure to use GM OE or ACDelco Professional parts.

 

Is your Silvy an NHT with 3.73 gears?

swathdiver Senior Enthusiast

swathdiver

Posted
Posted
1 hour ago, Boomer1974! said:

Swathdiver it is a 2012 Chevy Silverado 1500 crew cab with 6.2 L  with 3.73 gears with a 6 in lift 325/60R20 BFG MT

My daughter just bought one; loves the 6.2 and NHTs 3.73 gears and it has a Zone 6.5 lift running 35x12.5x18s with Nitto mud tires for now.  

 

Curious, what kind of mileage are you getting and did you recalibrate the speedometer?  She averaged 15 mpg on the highway on 91/93 and gets about 9 mpg burning straight E85 in mixed city/highway driving around town.

 

 

IMG_4258.jpg

Boomer1974! Enthusiast

Boomer1974!

Posted
  • Author
Posted

ProComp 6 in I bought the truck last year already lifted it is a Tuscany conversion. Not sure on the calibration of speedometer. I am going to put a McGaughys 7-9 on it in about 6 months I am getting around 12.9-13.5 on the highway running 87 just switched to 89/91 so will have to get back with you after I run it for a bit. 

CEE44C6E-EE23-44DE-BC26-EA0F08ACA00E.jpeg

  • Like 1
Boomer1974! Enthusiast

Boomer1974!

Posted
  • Author
Posted

Swathdiver I drove to a town 14 miles away last night and I was getting 15.4 mpg with switching to the 89 octane. Taking it to get windows tinted on Wednesday so we will see what kind of mpg I get then. The shop is about an hour away and then I will be driving to my daughters game and then home so I will be putting some miles on it then. Will keep you updated.

  • Thanks 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Chuck FB
      Joke Thread

      By Chuck FB · Posted

      Fred was in the fertilized egg business. He had several hundred young pullets, and ten roosters to fertilize the eggs He kept records, and any rooster not performing went into the soup pot and was replaced. This took a lot of time, so he bought some tiny bells and attached them to his roosters. Each bell had a different tone, so he could tell from a distance, which rooster was performing. Now, he could sit on the porch and fill out an efficiency report by just listening to the bells. Fred's favourite rooster, old Butch, was a very fine specimen, but this morning he noticed old Butch's bell hadn't rung at all! When he went to investigate, he saw the other roosters were busy chasing pullets, bells-a-ringing, but the pullets, hearing the roosters coming, would run for cover. To Fred's amazement, old Butch had his bell in his beak, so it couldn't ring. He'd sneak up on a pullet, do his job and walk on to the next one. Fred was so proud of old Butch, he entered him in the City Show and he became an overnight sensation among the judges. The result was the judges not only awarded old Butch the "No Bell Piece Prize," but they also awarded him the "Pulletsurprise" as well. Clearly old Butch was a politician in the making. Who else but a politician could figure out how to win two of the most coveted awards on our planet by being the best at sneaking up on the unsuspecting populace and screwing them when they weren't paying attention. Vote carefully in the next election, you can't always hear the bells.
    • chfkief
      FS: Black Bear Performance AutoCal Tuning System

      By chfkief · Posted

      Do you still have?
    • 3CarSeatDad
      High Country Suburban build confirmation

      By 3CarSeatDad · Posted

      Can someone confirm if the GM order workbench terminal is able to validate a custom build sequence:   1) Initialize the Allocation Base: Open a new vehicle build queue, select the 2026 Chevrolet Suburban 4WD, and pick the High Country (3LZ Preferred Equipment Group).   2) Select the Diesel Powertrain: Go directly to the engine configuration screen and choose RPO code LZ0 (3.0L Duramax Turbo-Diesel). Ensure it maps to the MHS 10-speed automatic transmission.   3) Deploy the Seating Swap: Navigate to the Interior Options screen and enter RPO code ATT to replace the standard captain's chairs with the power-release 60/40 bench seat. Because you are not trying to force a separate luxury or air-suspension bundle, the standard, premium D07 Fixed Floor Console remains active. The system will accept this change immediately without triggering a warning message.   3)Apply Heavy-Duty Hauling Capability: Input RPO code NHT (Max Trailering Package). The commercial terminal will automatically bundle the required trailering hardware and software modules to support the diesel engine's maximum towing capacity.   5) Layer the Premium Tech and Glass: Separately add code C3U (Panoramic Power Sunroof) and code UKL (Super Cruise) to the order screen.   6) Run the Final Validation: Click the "Validate Order" button at the bottom of the interface.
    • revmanii
      Looking at ordering a '26 WT because I want a std cab, std bed

      By revmanii · Posted

      Spent the last hour or 2 googling and reading up on the spacer thing. I don't like the loss of thread contact on the slip on spacers, but it appears you can get "extended" lug nuts that reach into the hole of the wheel to get back the lost threads. Looks like the only true hubcentric slip on spacers are at least .375". I'd want as little as I could get away with and don't want to cause other clearance issues going any thicker. Bora seems to offer what appears to be a well made .375" spacer and extended lug nuts. I searched here and did find a couple threads recommending Bora. But not cheap. By the time I buy spacers and lugs, new TPMS sensors, then pay a tire shop to install the new sensors, I suspect I'm going to be in over $400. Thinking about running out and getting some washers to put behind the wheel to see if .375" is enough to clear calipers, turn lock to lock without rubbing, and to see if the wheels/tires look strange pushed out a little. This would just be to check fitment.
    • Core-Lokt
      Road Master Active Suspension

      By Core-Lokt · Posted

      Roadmaster makes some quality parts; I have their sway bar. I considered the RAS, but I ended up bagging. I didn't know what kind of ride I'd get with RAS, and the bags have interior jounce bumpers, so I can run 0 pounds pressure. I figured I'd have the best of normal suspension ride with assist on-demand. But it seems you got pretty much the same in one item.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...