Question about 2000 GMC Sierra

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Where is the oil pressure switch on a 2000gmc 5.7

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On most models the sensor is on the back of the intake near the firewall.

Posted on Apr 21, 2013

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Posted on Jan 02, 2017

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3 Answers

Oil light on after engine warm-up on idle


this means a mechanical gauge test is required to check actual pressure warm idling if low below 20 psi then the oil pressure pump relief is stuck open or engine bearing are worn

May 15, 2014 | 2005 Opel Astra 1.4

1 Answer

Put on new fuel pump got pressuer but want stay cranked


Your post is lacking any detail. However, if you are stating that the engine starts after being cranked but dies out (wont stay running) there are 2 ways the fuel pump is activated. When the key is first turned on, there is a 5 second fuel pump run (the ECM energizes the fuel pump relay). After the engine starts, the fuel pump relay will only stay energized when the oil pressure switch closes keeping the fuel pump relay on (oil pressure is above 5-7 psi). If the oil pressure switch is faulty or there is no oil pressure, the engine will stall just after starting.

Apr 10, 2014 | 1999 Chevrolet Astro

1 Answer

Lost all oil pressure and the blazer shut off. its a 1985 2.8 v6. is there a automatic cut off in the car? And how hard is it to change the oil sending unit?


The fuel pump gets power from the oil pressure switch once the engine is started. So if oil pressure drops below 5 psi the engine should stop.
Other than a special socket to fit the oil pressure switch, its not too difficult to change.

Jan 23, 2014 | 1985 Chevrolet S-10 Blazer

1 Answer

Typically how long does an oil pressure switch last for a 2000 chevy malibu


Oil pressure switches have about the same life expectancy on all vehicles (about 5 yrs). They are screwed into an oil passage. When the engine is under pressure, oil pushes against a diaphragm (or flexible partition) inside the switch. As long as the oil is pushing against the diaphragm, it prevents the metal electrical contact on it from making contact with its inner base, which would complete the circuit to the oil light. When the diaphragm leaks, oil seeps through the outer housing of the switch. As the oil seeps through, it doesn't maintain the pressure required to keep the light out (especially at idle), causing the light to sometimes flicker. It will also create oil leaks.

Sep 02, 2011 | 2000 Chevrolet Malibu

1 Answer

My 2000gmc safari wont start was fine until it rained.replaced feul pump 2mths ago.now it wont say nothin


check fuse then check fuel pressure if you have fuel pressure then spyder injectors possibly bad

May 28, 2011 | GMC Safari Cars & Trucks

1 Answer

I have a Honda 2004 CRV - the repair ( OBD II) code is P2647 - what does that mean?


P2647 VTEC Oil Pressure Switch Circuit High Voltage - With Automatic Transmission Basicallly the sensor has gone bad or an oil passage has become blocked.

**. Locate the Variable Timing Electronic Control (VTEC) pressure switch on the end of the cylinder head. Honda has had problems with the VTEC oil pressure switch, there is an updated part number for the vehicle (37250-PNE-G01). On this vehicle the VTEC oil pressure switch can fail at any RPM.
2. The VTEC oil switch is normally closed, and grounds the reference voltage from the Engine Control Module (ECM) on the Blue/Black (BLU/BLK) wire. If the code sets at idle - 2500 RPM - and the Brown/Yellow wire has a good ground, then suspect a faulty VTEC oil pressure switch.
3. At approximately 2500-4000 RPM and when driving the vehicle, the VTEC system should turn on. To turn on the system, the ECM energizes the VTEC Solenoid valve and it allows oil pressure into the intake valve rocker arms, the oil pressure opens the VTEC oil pressure switch so the Engine Control Module (ECM) can verify that the VTEC did turn on correctly.
4. The code will set at idle to 2500 RPM if the reference voltage is not grounded. The code will set above 2500-4000 RPM if the VTEC oil switch does not open.
5. If the code sets at 2500-4000 RPM or higher, the problem can be a low oil level or pressure, or a malfunction in the VTEC assembly.
Potential Causes: Low Engine Oil
Plugged Oil Passage
Insufficient Oil Pressure
Plugged Oil Screen
Insufficient Oil Volume
Malfunctioning VTEC Oil Pressure Switch
Defective VTEC Solenoid

Jul 13, 2009 | 2004 Honda CR-V

2 Answers

Oil light


If the oil light is on it's one of 2 things: You have no oil pressure, or the sending unit (also known as the oil pressure switch) is defective and is reading no pressure when there actually is normal pressure. You should always assume it means no pressure, because driving it this way will ruin the engine.

Mar 19, 2009 | 2000 Chevrolet Venture

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