Quote:
Originally Posted by csavaglio
It was the original that started fluctuating, which is why I replaced it. The Duralast one reads steady, just very high compared to the original. The original gave good readings (aside from the fluctuations), at least compared to what I've read is considered good for the LT5.
Autozone (and others) list a couple other brands, but I figured Duralast would be the better choice with a lifetime warranty and an actual named brand.
I can get one from GM, but it doesn't looks much like the original and it's very expensive.....almost 3 times the parts store ones.
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You mentioned " very high compared" - exchange what you have already paid for and compare the results with the replacement of the same brand. If it's dramatically different than what you have well then you've reason to question maybe the "BRAND" but there's maybe no need to just spend money for "another brand".
Don't know what the gauge requires for resistance values at 0 and the at 80. - Maybe someone knows. I've never investigated the cluster that deeply. Maybe just check the sender as is with a DMM and record those settings and then use a 100 Ohm pot and see what the gauge wants to see for values. I wouldn't think it difficult to trouble-shoot and confirm. Then there's always a mechanical confirmation.
A Wells PS220 which is a direct replacement for the GM 12555492 says this:
•Switch opens 2-7 PSI
•80 PSI - 60-96 Ohms
•40 PSI - 48-70 Ohms
•8 PSI - 20-35 Ohms
•Less than 2 PSI - 5 Ohms max
It appears maybe that most GM are 0 - 100 Ohm likely.