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  1. haromaster87

    1990 Suburban oil pressure gauge only reads 30 PSI

    lol That sounds about correct based on how I've heard the "accuracy" of the factory gauges described. Honestly even now that mine seems to be working correctly, it works about how you described. So I guess they're working as designed at least, for whatever that's worth haha.
  2. haromaster87

    1990 Suburban oil pressure gauge only reads 30 PSI

    Sadly I've replaced the sensor as well with a new Delco unit and made sure to not use any sealant. The old sensor behaved the same way so that was seemingly ruled out. I will definitely do some checking on the ground connection between the block and battery though, see if I missed anything...
  3. haromaster87

    1990 Suburban oil pressure gauge only reads 30 PSI

    Sadly I've removed/reseated it more times than I can remember haha. I even sanded the contacts on the cluster housing and both gauges I'm testing with to see if it was poor conductivity, but the issue remains.
  4. haromaster87

    1990 Suburban oil pressure gauge only reads 30 PSI

    Ah no worries, these gauge issues are non stop on this forum so I know how it is haha. Thanks a bunch for the response though, you filled in my last bit of curiosity about the gauge functions. I completely overlooked the fact that there would need to be positive voltage on the sensor wire, makes...
  5. haromaster87

    Temperature gauge won't move from cold

    Well after confidently declaring this issue to likely be related to the resistor on the gauge, I have now encountered my first temp gauge issue where the sender, signal, and capacitor tests okay, but the gauge refuses to work correctly. Brysonsproject - can you try to test the resistance values...
  6. haromaster87

    1990 Suburban oil pressure gauge only reads 30 PSI

    Well I got the oil pressure gauge working, after reseating the oil pressure sensor connector again, it started working normally. Reads ~40 PSI at cold idle and goes up a bit when I rev. Still have to figure out this temp gauge issue, but based on this thread, I might seek out another forum to...
  7. haromaster87

    1990 Suburban oil pressure gauge only reads 30 PSI

    Maybe someone will know this, should there be continuity between the +12v signal and the sensor signal on any of the gauges when the key is on? I found that on both the oil pressure and temp gauge, the sensor wire/connector shows continuity with the pink/black wire/connector that supplies +12v...
  8. haromaster87

    1990 Suburban oil pressure gauge only reads 30 PSI

    Can any one with a 1988-1991 Suburban tell me their oil pressure gauge behavior? Does it move around at all or sit at a fixed value regardless of engine conditions? I have tested every thing I can find on this gauge. I have confirmed the ohm value varies at the actual connection contacts in...
  9. haromaster87

    Temperature gauge won't move from cold

    Surprised no one has mentioned the ceramic resistor on the back of the gauge. There should be a white rectangular piece that is mounted between two of the posts on the back of the gauge, this is a resistor that calibrates the way the gauge reads based on the input from the sender. The resistors...
  10. haromaster87

    1990 Suburban oil pressure gauge only reads 30 PSI

    Hey everyone, I am working on the dash refresh for my 1990 R1500 Suburban and I'm trying to sort out some odd gauge behavior it has, specifically the Oil Pressure gauge. Since I got the truck, the OP gauge has always behaved more like an idiot light. It reads 0 PSI when the truck is off, and...
  11. haromaster87

    Flat 10 hole wheel covers, 15" and 16"?

    Yeah, that seems to be the conclusion amongst people with eyes haha. Realistically I probably won't get the covers, but finding out about the 15" version peaked my curiosity. Now for a really controversial take, I cleaned up the wheel that lost the trim ring and found I really like the way...
  12. haromaster87

    Flat 10 hole wheel covers, 15" and 16"?

    Lol I actually haven't always been a huge fan either. I knew my taste was finally in the toilet when I found myself thinking of running them. :Big Laugh: Nice set! Yeah the consensus I usually see is people remove them, see the truck without them, and never look back lmao.
  13. haromaster87

    Flat 10 hole wheel covers, 15" and 16"?

    Hey everyone, I have a question regarding the wheel covers shown in these two ebay listings: https://www.ebay.com/itm/325786466249 https://www.ebay.com/itm/145462928984 Did they indeed make that wheel cover in a 15 inch and 16 inch version? I had previously only seen them on 3/4 ton...

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