More the likely the alternator has quite working are the belt / belts have broken on the front of the engine.
1999 Chevy table oil pressure gauge low and check gauges flickering
recharge gauge shows pressure of 70 psi
fuel gauge,speedomiter on instrument panel doesnt work on car and keeps stalling
Check gauge? Never heard of a check gauge light. If you are referring to the check engine light it is on because there is a problem with the emissions system. You need to have the ECU scanned by a professional.
the Air conditioning would have to work harder - its a guess depends if the gauge is showing Battery Life or Battery Output
The oil pressure gauge will fluctuate on a Chevy Tahoe when the vehicle is idling and when the vehicle is driven at highway speed. Idle is usually 30 psi oil pressure or slightly more. At highway speed, the oil pressure should be between 60 psi and 80 psi.
check the alternator and battery.
sounds like the alternator is going bad.
What year is your car? Did you mean the CHECK ENGINE light? The battery gauge?
it works in side the battery
try changing the sending unit for the temp gauge
That light notifies you that one of the gauges is out of its normal parameter. Check the temp (overheating), the voltage (not charging) and the oil pressure gauge (low or no oil pressure).