Voltage Problem

I have a 2002 Camaro and somtimes when it is cold out the voltage meter gos to about 15 1/2 volts. Anyone know what could cause this or if this is a common problem with this car. Thanks

The voltage generated by your alternator is controlled by your PCM via your voltage regulator. It engages your pulley clutches when triggered. When you start your car in cold weather it takes more energy for your battery to start the car which then your PCM tells your alternator that it needs more amps. Which then creates more power. Its normal, mine does it too.

pulley clutches Uhm? I though it had a regular cs133D that doesnt have any cluthes and stuff

15 1/2 a bit too much, why not 14 1/2 (on the safe side)
i agree it needs more amps, but that many volts.
Wont this waste the battery pretty fast like that.

What do you think causes your alternator to generate more power when prompted by the regulator if there are no clutches?. Also a cs133 is a older style alternator, GM started using a CS144 series on most F-bodys starting around 95.

yea.. higher voltage (when cold) is normal. and it doesn't drain the battery. However, I'm not aware of any clutches in an alternator. to my understanding they mostly consist of a generator (essentially an electric motor) which is turned by the pulley at the speed of the engine. the level of power output is determined not by varying the speed with clutches but with the built-in voltage regulator. This is my understanding.

does a cs133 have clutches? if you bought a new or rebuilt alternator for a third gen today would it be a cs144?