Question about 2006 Chevrolet Silverado 1500 2WD

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I have a 2006 chevy 4x4 silveraldo, charging system failure on dash with low voltage on gauge. Have replaced battery & alternator twice. Still have problem...

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  • Chevrolet Master
  • 1,940 Answers

  1. Test the voltage going to your battery using a multimeter. The voltage should be around 14.3-14.6 volts when running. This would mean your alternator is working fine.
  2. If the voltage is around 12 or less, you should check your Alternator fuse, and the wiring leading to your alternator.
  3. At the alternator, measure the voltage going to the main power wire/post for 12 volts with the engine off. Is the voltage equal to battery positive voltage (B+)? If not, repair the circuit.
  4. If your alternator is charging correctly, you may have a faulty instrument cluster, or a short in the wiring.
  5. Inspect the Battery case, posts, hold-down clamp, cables and connections for damage.
  6. Inspect the Generator drive (serpentine) belt for condition and tension to make sure there is no slip between the belt and the pulley.
  7. Inspect the Generator pulley.
  8. Check the operation of the charging system warning indicator in the instrument cluster. Normal operation is as follows:
  • With the key off, the charging system warning indicator should be off.
  • With the key on and the engine off, the charging system warning indicator should be on.
  • With the engine running, the charging system warning indicator should be off.

Posted on Mar 13, 2011

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