What do you mean check the sentinel? If you have it, there will be a roller wheel (much like the one used to adjust the brightness of you're gauges and interior lights) right beside the brightness adjust roller I just mentioned, to the left side of the steering column.
There is a switch called the "twilight sentinel". That alllows you to adjust the time that the lights will stay on after you turn the engine off. Check to see if that is working properly.
check you belt
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check the bulbs to see if there burnt and check your fuses
There is a fuse for the gauges, check it.
Yes, economy passengers can use twilight check in.
The check gauge light on the 1994 Chevrolet Caprice comes on because there is something on the gauges that requires attention. It is a good idea to take the vehicle to a mechanic when this light comes on.
daytime running lights always go off when you shut off the car.early ones had time delay. check your twilight sentinel you'll feel a click when you turn it all the way when you feel the click turn it the other way
Check out the 'Related Links' section for recommedations on Twilight fansites below.
Check your timing and if it is a carb, check to make sure the air fuel mixture is set properly.
Check the fuse.jr
check the wiring to the speedometer. Check the sending unit as well. If the problem is internal then the speedometer will have to be replaced.