Owner's Manual
Page 117
The normal range is 11 to 15 volts. If the gage reading stays in either red range, have the optional gage cluster, this light will come on , you need service, and you have your Buick dealer check the electrical system. 115 If the light stays on briefly, to show that your alternator and battery charging systemsareworking. If you should take your Buick to the dealer at once. To save your battery until you turn off all accessories, and set your air system to OFF. Volts Gage OLTS When you get there, turn the key to RUN, this gage shows voltage in the electrical system.
The normal range is 11 to 15 volts. If the gage reading stays in either red range, have the optional gage cluster, this light will come on , you need service, and you have your Buick dealer check the electrical system. 115 If the light stays on briefly, to show that your alternator and battery charging systemsareworking. If you should take your Buick to the dealer at once. To save your battery until you turn off all accessories, and set your air system to OFF. Volts Gage OLTS When you get there, turn the key to RUN, this gage shows voltage in the electrical system.