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Drives

Found 4 results

  1. 2018 Silverado 2500 LT 1,300 miles truck during the day shows volts at 12.5. I can turn on ac full blast, radio and defroster and colts stay at 12.5 all day. When driving volts stay at 12.5 when I’m rolling and foot of gas mpg gauge goes up to 99mpg then will charge at 14volts as soon as I hit the gas bolts drop to 12.5. And night when headlights turn on truck will charge at 14 volts. First two times truck was taken to dealer they said nothing is wrong now the third time they tell me that’s not normal and change alternator and never fixed the problem still in the shop. Anyone have same issues or volts stay around 13.2-14.5 volts all day and night
  2. Replaced battery and alternator after the truck died after a 5 hour drive a month back. i had to replace the battery and alternator since the truck was holding 10.5 volts on the old batt/alt and i was 5 hours away working in another town so i had no choice to replace both to make the 5 hour drive home. now the truck does this weird thing were it will only start charging once you hit a certain rpm range. ive cleaned the grounds under the driver side on the frame rail. The one under the rad support to battery . Replaced the broken hood to body ground. Checked the body to block ground strap and now the truck will ONLY start charging once the RPMS hit 4-7k and then the truck runs completely like normal and holds voltage at any rpm. untill the truck is turned off and you have to repeat the process of having to rev/drive the truck up to 4-7k rpms and voltage jumps to 10v to 14.5v. i don't mind doing this when its warm lol since its a quick fix but its not ideal and the problem is winter is coming and regular -20c to -30c temps soon so i don't want to be hitting those rpms to keep the battery alive when the truck is still warming up. ive read that 2005 models have some kind of module on the ground. just wondering if anyone has experienced this weird symptom .any ideas would be helpful, thanks guys. 2005 gmc sierra 1500 4x4
  3. I'm not sure how far ill get with this but here goes. I have a 2018 GMC Sierra 1500 5.3L C engine code non flex. Its got 20k on it when i bought it had a crappy napa battery in it but the adaptive charging system worked fine with the napa battery it would be a 14.4 volts on start up and then drop down to 12 as it should and the back up to 14 per the conditions listed in the service info well i replaced the 94r napa battery with a 94r oriellys agm battery and the voltage would inky stay at 14.4 not drop down to 12 when electrical loads are low so i hooked up the scan tool at my shop and see that according to the BCM the battery was at 67%charged (all other data was normal and in the right conditions for the charging sytem to drop down to 12 volts) but the state of charge has to be at least 80% so i tried charging the battery and state of charge on the scan tool never changed so i attributed it to the fact that i put an agm battery in the truck and the BCM didnt like this so i went and exchanged it for a non agm 94r battery and intalled it well after driving it for a bit the charging system still did not drop down to 12 volts despite low electrical load. Ill hook the scan tool back up tomorrow and see what the BCM thinks the state of charge is but has anyone else encountered this? Thanks.
  4. Hi! New here, first post... a question... I tow a small camping trailer with my 2017 Silverado 1500 LT 4x4. I've been under the assumption that the camper battery charges through the 7-blade connector while being towed. I'm just wondering if anyone can confirm this is happening or if I need to upgrade something to make sure. I've read a little about "low voltage / smart alternators" that may interfere with this process, just looking to understand for now. Thanks! Ernie in Southern Wisconsin
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