Hey guys I got a 93 2500 burb with a 5.7 350 The temp gauge is reading very low and I know its not that low. What would you check first? Gauge? sensor? Is there a way to test either of these? or just replace sensor then go from there? Another question is this the dash lights in the guage cluster it looks like there is a light out? The top half of the cluster is lit up well the bottom half is dark. Anyone ever replace these bulbs? Need to know how to do this too. Thanks in advance for your help.