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1-17 of 17 Results
  1. General Discussions
    Every time I change one of my batteries on my 2004 GMC Sierra 2500hd Diesel I start the truck with no problem but I lose some accessories. I use to disconnect my battery for a minute and it would be fine. Not this time. I tried disconnecting each connection and reconnect but no luck. Any ideas...
  2. Gauges, Electronics and Wiring.
    Truck wouldn’t start Friday night. Jumped it off ran around town “left it running” got home and switched it off. Crunk as it should the next morning but was dead again the next night. Multimeter said 8v. I bought new platinum duralast agms today for it. My question is.. When it’s running should...
  3. General Discussions
    I just got a 17 silverado and noticed today the auxiliary battery negative terminal is disconnected. The cap is still on the battery. The truck drove 4 hours home fine, starts and seems fine today. Why would this be disconnected?
  4. Gauges, Electronics and Wiring.
    Hi all my father in-law has got a 2015 LML nothing done to it he had me check out a smell he had that day come to find out the battery distribution block on the passenger side with the 4 main posts. on post 2 with the wires that run around the firewall side and one to the alternator was HOT so...
  5. 2017 - '19 (Non Powertrain)
    Hello, My batteries need replacing. Strangely, my passenger side battery is in front of fluid reservoir and most of the videos I watched had the battery tray back by the firewall. Not sure what the story is here. Also... my truck will not fit anything larger than the 760 CCA battery size. I...
  6. Gauges, Electronics and Wiring.
    I've got an 06 LBZ with cel P0621. I had the batteries and atl tested today and all checked out to be good. No dash light for battery and no message on the odometer for battery not charging. Voltmeter shows 14.1 when the truck is running. Could a bad ground somewhere be causing this? The code...
  7. 911 Problems Forum
    Hi all Have a 2016 LML will not start. Drove fine and shut it off and now will not crank. Just hear a click. Some background: Truck is stock with 140000kms. Had a slow crank/start issue for the last little while which I knew was a bad battery. Tired to boost it and still wont crank. Replaced...
  8. 911 Problems Forum
    This has been an ongoing issue. It started back in June. I was driving and it lost power and it said service traction control and StabiliTrak. and sometimes whenever I go to crank it will do this and will not crank. So it sat in the shop for a month and they called the dealer and they said it...
  9. Gauges, Electronics and Wiring.
    Hey all I just bought a 2007 with plow from my work and it has a battery drain issue that I don't want to tear into til spring is here and plowing season is over. For now I am just planning on putting a disconnect on, but my question is which battery negative do I put it on? Thanks
  10. General Discussions
    I’m “almost” at a loss. truck info : 2011 Sierra Denali 2500 edge tuned and dpf deleted. location : MN Snowy and cold Replaced: transmission filters, NSBU switch all the stories short: Hooked up boss v plow. Plowed twice. Second time out, went in to limp mode sporadically. Pulled codes p0700...
  11. General Discussions
    Hello Everyone, I am a new member, just took delivery on my 2022 3500HD Denali last week. I ordered the truck with dual alternators thinking that I would have increased current to charge batteries in the RV. However, I think that the RV charging pin is limited to 40 amps by a fuse in the...
  12. Gauges, Electronics and Wiring.
    So intermittently my truck will have a huge kick back (like a really rough shift), and then the gauges will go all over the place and my doors will just keep unlocking and locking constantly, my screen/display for my tuner turns off, and sometimes i lose power to the accelerator. After replacing...
  13. 2011-2016 (Non Powertrain)
    I have a 2015 GMC 2500 with around 90k miles. Last year some work was done on the truck by a local diesel shop (Cp3 Conversion, FASS, up pipes, downpipe, EGR plate, full 4"exhaust, tuning). Ever since then, every time I start the truck, I get a "low battery" message pop on the dash. The shop...
  14. 2001 - 2007 (GMT800) Non Powertrain
    For about 4 weeks, my AC has been giving me problems at an idle. In the past, it would blow nice and cold all through the RPM range. Lately, if at an idle for more than a minute, it would blow that warm, muggy air like the compressor kicked out. I could never see that the clutch disengaged...
  15. General Discussions
    I have an '02 Chevy Silverado 2500HD crew cab plus long bed. Love the truck. My alternator goes out, but I decide to drive from Milpitas to Santa Cruz and back. It's a 2 hr drive round trip and I made alot of stops in between. I know I'm pushing it as the voltage is below 12 volts and the...
  16. 2001 - 2007 (GMT800) Non Powertrain
    went to add an extension cable to my juice monitor so i could put it up higher. anyways unplugged it, put the truck in first to pull my dash off, put it back into park went to start it and she was dead... any ideas?
  17. 911 Problems Forum
    Have a 2002 Silverado 2500 HD with the Duramax. The truck wouldn't start one day, had no power at all. Batteries are under 2 years old. I noticed some corrosion on the at the terminal end of the battery cables so I cleaned them up. Still no power at all. So I went home to get my meter and...
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