baskervi

We have an '02 Burb with a 5.3L engine, but recently we noticed the alternator gauge was reading at around 3/4 the maximum reading. I've taken it to two different places, and both said the alternator is fine. When I connect my multimeter to it, the voltage at the battery is 15 volts. I don't want to damage the batter or any electronics, but is this acceptable? I was told as long as it wasn't in the red, things are OK. I don't feel confident in this advice, but at the same time, I don't want to pay $200 for an alternator if I don't have to.

Thanks for advice on this.

73shark

Welcome to the forum.

Normally I'd say yes but mine runs 15 V a lot and service says no problem. Of course mine is controlled by a computer and not a voltage regulator in the alternator.

in2pro

The range looks to be 11v to 16v....


Charging System Indicator
The IPC illuminates the charge indicator in the message center when the following occurs:

• The PCM detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the PCM requesting illumination.

• The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the body control module (BCM) indicating the system voltage.

• The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.

• The ignition is on, with the engine off.