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Found 10 results

  1. I am new to the forums and hoping someone may have seen this or run into this before. I own a 2012 Silverado LTZ Crew Cab, 5.3L, 2WD, 102K miles, Factory radio with a harness plug for a an amp for subs. Electric drop down side steps. LED headlights & fogs. K&N Nighthawk Intake. Battery is less than a year old but i'm in Arizona so batteries get wrecked yearly. I recently took my truck to my local DIY car wash place where I always go. I washed my truck like normal and dried it off like normal. I did not spray engine bay, just the front grill area inward but not heavy. I don
  2. Hey all, I will start from the beginning here. Purchased my new 2017 Sierra Elevation Edition in February 2017. Drove it off the lot with 6 miles on it. This is my first new vehicle so its been a little discerning to me that this has more issues than any used car I have owned before. A few weeks after owning the truck, my microphone stopped working for my phone calls and the onstar stopped working all together. My OnStar module died and they replaced it with a new one. About 5 thousand miles later, my trucks radio screen started randomly going black, turning off all sound, then co
  3. I bought a 2011 GMC Sierra just over a month ago from my dad and the volt meter on the dash is reading about 16. The alternator and battery were both changed in the spring. I put an LED taillight strip on a few weeks ago and I'm thinking it could possibly have something to do with that? When I was driving home for the holidays I got ago halfway and the check engine light came on but then went away later that night after it had been sitting for a while. When I was on my way back the light came back on and hasn’t went off. The command start also doesn’t work when the light is on.
  4. SO have noticed over the past few months that I never seem to fill my HC according to the gauge. It always shows a tick low unless I fill from over a half tank. If it's over a half tank when I fill up then it will show on the FULL line. If I fill from under half it always shows a tick below the full line? I also started to notice that my voltage swings widely. I can go from almost 15v and it will drop to 13 for awhile then back to 14.5 then back to 13. It's constantly moving which seems strange... Anyone else noticing anything weird with the gauges like this?
  5. My voltage and temp gauges don't work in my truck. Sometimes they move when I turn the key to the on position but when the truck turns on, the temp slowly goes down to 0 if it's hot and if cold it does nothing. The voltage gauge worked awhile back registering 12v. But just went off all of a sudden. What could I look for as the problem?
  6. My voltage and temp gauges don't work in my truck. Sometimes they move when I turn the key to the on position but when the truck turns on, the temp slowly goes down to 0 if it's hot and if cold it does nothing. The voltage gauge worked awhile back registering 12. But just went off all of a sudden. What could I look for as the problem?
  7. 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
  8. Hello everyone, new member here from Tucson. I recently purchased a Yukon, and i suspect a bad alternator, but i am new to TBI so this may be normal behavior. When cold, im pulling a solid 14v, as the truck warms up, the voltage drops to 12v. With lights and a/c running its 11v, and it seems to have nothing to do with rpm. The truck has a new 600/750 CCA battery. Is this normal behavior for a 350 TBI? Thank you.
  9. alternator reads 13.6 volts charging. Voltage on the dash is 12. As the vehicle runs the voltage drops slowly until 10 volts. Any suggestions to what the issue is? Brand new battery solid ground on it and positive.
  10. Periodically my 05 Silverado flashes a red battery warning light and a "Service Charging System" warning displays. The voltage then begins to fluctuate maybe 2-3 volts over and under 14v. Lights dim and brighten. Then warnings shut off and all is back to normal. This happens at least once a day or so for about a year. Hasn't gotten worse....any idea what problem is?
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