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I have an 02 GMC Sierra 1500 with a 4.8 engine (230K miles).

Yesterday while on a small...
I have an 02 GMC Sierra 1500 with a 4.8 engine (230K miles). Yesterday while on a small road trip, the battery light started intermittent flashing when first started up. This happened a few times and rapidly progressed to staying on about 95% of the time. I drove the 100 plus miles home but as I drove my voltage gauge slowly went down. Truck got me home but battery almost dead. I assume that the issue is a voltage regulator or the alternator itself. Any idea's?Matt
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Answered in 1 minute by:
3/13/2018
roybelding
roybelding, Master Tech/Trainer
Category: GMC
Satisfied Customers: 7,271
Experience: 35 years of retail operations on all vehicles
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hello, my name is ***** ***** I will be glad to assist you. please allow me a couple of minutes to gather some basic info.

Roy

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Good morning

Yes, you have an alternator failure. Even if it was a regulator you want to replace the whole assembly. replace the alternator and re check the voltage

Roy

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Customer reply replied 1 month ago
A little confused, is the voltage regulator part of the alternator?

yes, it is internal in the alternator.

roybelding
roybelding, Master Tech/Trainer
Category: GMC
Satisfied Customers: 7,271
Experience: 35 years of retail operations on all vehicles
Verified
roybelding and 87 other GMC Specialists are ready to help you
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Customer reply replied 1 month ago
Many thanks Roy

thank you

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