It could be a couple of things. Depending on the type of cluster it could be a couple of burnt out light bulbs (easy and cheap fix). Also, it could be that your cluster is dying (expensive fix). If this is the problem try a place through the internet called Mr Whizard, they rebuild instrument clusters ($200 - $300) verses a new cluster ($1000+).
getting speedometer to work on a 91 chev it is most likely the vehicle speed sensor on transaxle pass. side, about 40 dollars at part store
Try changing the fuel filter.
Bring to a shop that has an ABS scanner to determine the problem
The gas tank on a 1990 Chevy Corsica is 15.6 gallons. A 1990 Chevy Corsica takes unleaded gas not premium.
A 1989 Chevy Corsica 2.0 sedan weights about 2595 pounds. The 1989 Chevy Corsica 2.0 automatic sedan weight 2623 pounds.
where is the over drive solenoid located on a 1989 Chevy Corsica
where is the trunk release button for 1993 chevy corsica
it looks like a corsica
The Chevy Malibu
The speedometer is controlled by the speed sensor and it also sends signals to the transmission on when to shift so your problems could be related. The speed sensor is easy to replace and is located on the transmission.
The evaporator for a Chevy Corsica can not be unclogged. When it gets blocked, the evaporator can only be replaced.
A Haynes or chiltons manual has the how to. Or do a search for a forum for Chevy corsica specific