Sorry for not getting back. Took the sending unit out and tested as suggested. Looks like my problem is the gauge... Its such a pain to get to I have not gone any further with this. In general just frustrated at present... I bought rebuilt gauges and speedometer and both dont function correctly.. The gas gauge doesnt work and the odometer jumps ahead .. At 6/10 on gauge the 1 appeared.. At 3 miles the 1 in the 10 column rotated forward... At 60 miles the 1 in the hundreds column rotated forward... Waiting to see when the 1 for the 1000 column will show up?
Hasnt stopped me from driving but with no accurate odometer and a malfunctioning gas gauge im back to guessing when to fill up and carrying an extra 5 gal gas can.


Old Truck addict
1950 chevy 1 ton napco
1956 gmc 1 ton dually napco
1954 chevy 3/4 ton napco
1957 gmc civil defense napco panel