Lights and Volt meter
I have a 2003 SLE with a 3.8L engine with 75000 miles. I am having trouble with my voltmeter constantly fluctuating and all the lights in the car are flickering. I have replaced the alternator since it had a ruff sound in the bearing and tested the battery which checked out fine. I took the car to my local Pontiac dealer and they said that the (PCM) Computer was causing the voltage problem. Well today they replaced the PCM and it did not fix the car.
I was wondering if anyone else has had this problem and what it took to fix it. I am a diesel mechanic ( construction equipment) and am not afraid to work on my own stuff but i don't have the test equipment to troubleshoot all the electronics on vehicles today. Any advice will be greatfully appreciated.
Thanks in advance