The oil pressure sending unit on a 1989 GMC Sierra is located slightly above the oil filter. You will need a flashlight to find it. It may be hard to recognize it because it should have a heat shield around it as well. Look for its wire coming down from the engine compartment and follow it to the oil pressure sending unit. Drain your engine oil and remove the oil filter to make changing the oil pressure sending unit easier.
where is the fuel pump reset button or relay switch located on a gmc sierra 2003 and how do i get to it?
There is no power to the sending unit as it is a switch (activated by the pressurized oil pump) that signals a relay, this relay in return sendy 12 volts to another relay, which turns on power to the gauge indicating there is pressure
There is none.
You are referring to two separate things. The fuel pump has a relay and not a switch. The oil filter does not have a switch but the oil pressure has a sending unit that sends a pressure reading to the gauge. Some cars have an oil pressure switch that incorporates a circuit to shut the engine down in case it were to loose oil pressure.
Depending on the year, GM primarily used the oil pressure sending unit as the switch for the fuel pump. There is no reset button for a GM. There is also a fuel pump relay.
It is located under the driver side dash bourd. The relay switch will most likely have the "Ford" logo on it.
There is no relay, only a pressure switch that is wired directly to the instrument cluster with no relay in between. The pressure switch is located right next to the oil filter on a 4.6 or a 5.4 liter, and it is sticking out of the driver's side of the timing cover on a 4.2 liter.
No, if the oil pressure switch is bad it will just give you a false reading of your oil pressure.
The 1998 GMC signal flasher relay switch will be behind the drivers side dashboard. The signal flasher relay switch will be on the left-hand side of the gas pedal.
if your pressure on the low side is ok which is 25lb to 45lb then check your low pressure switch if the pressure is too low then the switch wont close there for the current wont go to the relay there for it wont be powered.
definatly sending unit gm's are notorious for this
Do you mean: 1. electrical relay, an electromechanical switch, 2. data relay, sending data from one node to another, or 3. some other use of the word "relay"? Clarification, please