Battery Charging: Notes

2004 Oldsmobile Bravada RWDSECTION Notes
WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required: J 42000  Battery Tester

  • For best results, use an automatic taper-rate battery charger with a voltage capability of 16 volts.
  • A battery showing a green dot in the hydrometer (1) does not need to be charged unless the J 42000  has shown that the battery needs to be charged.
  • A battery showing a dark dot in the hydrometer (2) should be charged unless the J 42000  has indicated no charge is needed.
  • Do not charge a battery when the built in hydrometer is clear or yellow in the center (3). Tap the hydrometer lightly in order to dislodge any air bubbles. The bubbles may cause a false indication. If the hydrometer is still clear or yellow, replace the battery.
  • Fig 1: Identifying Battery
    G01699689Courtesy of GENERAL MOTORS CORP.
  • The charging area should be well ventilated.
  • Do not charge a battery that appears to be frozen; allow the battery to warm to room temperature and test it before charging.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.