Chevrolet Silverado 1500 Engine Oil Pressure Switch Guide (2015-2023)
Dealing with a faulty oil pressure reading on your Silverado? Here’s what you need to know before replacing the switch.
- A faulty reading is often caused by a clogged filter screen under the sensor, not the sensor itself.
- The sensor is located at the back of the engine against the firewall and is very difficult to access.
- Always check your oil level immediately if you get a low pressure warning; do not continue driving.
- Error codes like P0521 can point to the sensor, but can also be caused by more serious issues like a failing oil pump.
Is Your Silverado's Oil Pressure Gauge Acting Up?
If you own a 2015-2023 Chevrolet Silverado 1500, you might eventually see the oil pressure gauge behave erratically or the low oil pressure warning light come on. While this can be alarming, it doesn't always mean your engine is in trouble. Often, the problem is a faulty engine oil pressure switch, not low oil pressure itself. However, you should always verify your oil level immediately when a low pressure warning appears.
Don't Ignore the Warning Light
Even if you suspect a bad sensor, never ignore a low oil pressure warning. Always pull over safely, turn off the engine, and check your oil level. Driving with genuine low oil pressure can destroy your engine in minutes.
Known Issues for 2015-2023 Silverado 1500
For these trucks, a faulty oil pressure reading isn't always the sensor itself. A very common issue is a small, thimble-sized filter screen located in the threaded port underneath the sensor. This screen can become clogged with sludge, blocking oil from reaching the sensor and causing a false low or zero reading. Many mechanics and experienced owners recommend replacing this screen (or choosing to remove it) whenever you replace the sensor.
🎬 See how to replace both the sensor and filter screen.Additionally, GM has issued Technical Service Bulletins (TSBs) related to oil pressure issues. For example, TSB 24-NA-173 for 2019-2024 models notes that DTC P0521 can be caused by a stuck oil pressure relief valve in the oil pump, not the sensor. This highlights the importance of proper diagnosis before simply replacing parts.
Choosing an Aftermarket Replacement Switch
When it's time to replace the switch, you have several aftermarket options. Quality can vary, so it's important to choose wisely.
- Standard Ignition (SMP): Often considered a reliable aftermarket brand, but some user reviews report premature failure. It's a widely available option that generally meets OE specifications.
- Walker Products: Walker is a long-standing aftermarket manufacturer that states their sensors are engineered to meet or exceed OE performance and provide an exact fit.
- Global Parts: This brand typically represents a budget-friendly option. While it can save money upfront, longevity and accuracy may not match higher-priced alternatives.
Pro Tip: Consider OEM
Many professional mechanics and experienced Silverado owners on forums strongly recommend using an AC Delco (OEM) sensor for this specific part. While aftermarket parts can offer savings, the labor involved in replacing this hard-to-reach sensor means you want to do the job only once. The cost difference may be worth the peace of mind.
Replacement Cost
The cost to replace the engine oil pressure switch can vary significantly based on whether you do it yourself or have a shop perform the work. The part itself is relatively inexpensive, but labor can be high due to its difficult location.
| Item | Cost Range |
|---|---|
| New Aftermarket Switch | $46.16 - $65.16 |
| Shop Labor | $134 - $197 |
| Total Professional Replacement | $199 - $262 |
Frequently Asked Questions (FAQ)
Where is the oil pressure switch located on a 2015-2023 Silverado 1500?
The sensor is located at the very back of the engine block, on the top, behind the intake manifold and close to the firewall. 🎬 Watch this video to see the exact sensor location. It is notoriously difficult to access, especially on 4x4 models which have less clearance.
Can I replace the oil pressure switch myself?
Yes, it is possible for a DIY mechanic, but it is a challenging job due to the location. It requires long extensions, a swivel socket, and a special oil pressure switch socket (typically 27mm or 1 1/16"). Many people find it frustrating to do without removing the intake manifold.
What is the little screen under the sensor? Should I replace it?
Underneath the oil pressure sensor is a small filter screen designed to protect the sensor. This screen often gets clogged and is a primary cause of false oil pressure readings. It is highly recommended to remove the old screen with a pick and either clean it, replace it with a new one, or leave it out, as many mechanics do.
What do the error codes P0521, P0522, or P0523 mean?
These are common diagnostic trouble codes (DTCs) related to the oil pressure sensor circuit. P0521 indicates a performance/range problem, P0522 indicates low voltage, and P0523 indicates high voltage. While a bad sensor is a common cause, these codes can also be triggered by wiring issues or actual oil pressure problems.
🎬 Learn more about diagnosing oil pressure symptoms and codes.Helpful Videos
Technical Specifications
OEM Part Numbers: 12677836
Requires a special 27mm or 1 1/16-inch deep socket for removal and installation. The sensor is often replaced alongside a small, removable filter screen located in the port below it.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Chevrolet Silverado 1500: