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Voltage regulator is more than likely defective. The Regulator is built into the alternator so you will have to replace the entire alternator. Just make sure it is really overcharging. You should read from 13.5 to around 15.5 volts with a digital DC voltmeter if the alternator is performing as it should. Must more than 15.5 volts and it is overcharging.
What else can I help you with?
Where is the starter on a 2007 Pontiac Grand Prix?
On a 2007 Pontiac Grand Prix, the starter is located on the passenger side of the engine, near the bottom. To access it, you may need to remove the battery and the battery tray for better visibility and space. The starter is mounted to the engine block and connected to the transmission.
When did Grand Prix of Portland end?
Grand Prix of Portland ended in 2007.
When did Grand Prix Masters end?
Grand Prix Masters ended in 2007.
Who won the 2007 F1 Australian Grand Prix?
Kimi Raikkonen, who win the 2007 Australian Grand Prix
When did Lone Star Grand Prix end?
Lone Star Grand Prix ended in 2007.
When was Animax Anison Grand Prix created?
Animax Anison Grand Prix was created in 2007.
What is the top speed of a 2007 Pontiac grand prix gt2?
my Magellan maestro showed 142 mph in a stock 2007 grand prix.
95 Grand prix won't turn over but still has power from the battery?
2001 grand prix wont turn over keep trying and it kills the battery
Does the 2007 grand prix have a auxiliary input?
No
How many 2007 Pontiac grand prix gxp's were made?
how many pontiac grand prix gxp were made
How do you change the battery on a 2001 Grand Prix?
You read the manual
What type of battery does a 1991 Pontiac grand prix use?
Side post battery
