gm125800

So Saturday I was using the truck's radio to kick back and "have a few". Every 30-45 minutes I would turn the vehicle on to help prevent the battery from dying. After the final start up I turned the vehicle and all radio and accessories off. I tried to crank it and low and behold battery was too low. My dad used his instant battery charger and started up instantly. Ever since then, the CEL stayed on. Thoughts?

jonbar87

Why don't you read the cell to find out what it's for?

gDMJoe

Offered for your consideration not knowing year of vehicle or DTC .....

KNOWN things that will affect the battery ...

• key left in ignition (even in the -OFF- position) after exiting vehicle and shutting the door.
  .
• leaving ANY accessory/appliance/etc. plugged-into ANY of the electrical recepticles with the ignition switch -OFF-
  .
• (2011+) improperly charging the battery.
  .
  • charger +(positive) to battery +(positive) post.
    .
  • charger -(negative) to engine|frame ground(negative).
    .
  • 8 hours of ABSOLUTELY NO ACTIVITY. *Not even opening a door.
    NOTE: This can be circumvented by the dealership service departement using their IDS (Integrated Diagnostic System) tool to reset the BMS (Battery Monitoring System).
  .
• leaving the sun visor's vanity light -ON-
  
  Less likely thou possible ...
  .
• faulty shift interlock switch
  .
• faulty door-ajar switch(es)
  .
• faulty after-market wiring and/or control modules

gm125800

Sorry, forgot to mention;
2011 Screw XLT with factory radio equipped with Sync. No aftermarket mods on it. 59k on the odometer