Use an inexpensive digital voltmeter to measure the battery voltage while the engine is running. It must be between 13.75 and 14.75 volts. If it's low, suspect the generator. It is real common to go through four to six of them on GM products, after the '86 models, in the live of the vehicle. To reduce the number of repeat failures, replace the battery at the same time as you replace the generator. As they age, they lose their ability to dampen and absorb the huge voltage spikes the generators produce due to their design. Those spikes can destroy the internal diodes and voltage regulator leading to the repeat failures, and they can cause running problems due to interference with computer sensor signals.
Here is a guide to help
The fuel gauge should find its way to the proper position when you fill the tank. It looks for the shortest way to the desired setting and that might currently be clockwise against the stop.
Wednesday, September 28th, 2011 AT 9:26 PM