Question about 2003 Chevrolet Silverado Ss

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2003 Chevy Silverado Instrument cluster missreads

I have an issue with the instrument cluster posting incorrect reading. Low oil pressure, high temp, low volts no gas, and speedo inop. All of the reading will fluctuate and I know that all of the fluids and pressures are at the correct levels. Any answers?

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Replace instrument panel cluster

Posted on Nov 27, 2009

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Hi, this is a pretty common problem on these Silverado instrument clusters. We can repair it for you or provide you with the parts to do it yourself. Click here to learn more about these silverado instrument cluster problems: Dr Speedometer Instrument Cluster Repair Speedometer Repair Guage...

Posted on Nov 06, 2014

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I had a similar problem with my 03 1500 with the temperature gage reading high. Changed the same thermostate and still had the problem. Took it to the dealership and found out there is a problem with the instrument cluster and Chevy has extended the warranty on the instrument cluster. So, check with your local dealership.

Posted on Feb 03, 2009

  • kelleyao3 Feb 08, 2011

    Don't think you're gonna get General Motors to do anything...had this probelm and went all the way to corporate with my complaint...was told it's your problem...then they filed bankruptcy...only thing to do is what I did...drive it as a reminder never to buy a General Motors product again

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  • Chevrolet Master
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03 was chevrolets worst years for speedometer problems usually the spedo motor is bad but in your case it could be you need to check to see how many volts your alternator is putting out and make sure it is regulating right 13.8 there just might be a voltage problem messing with these type things.. just a thought thanks Jerry holler if you need more.

Posted on Jan 30, 2009

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Posted on Jan 02, 2017

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1 Answer

Is there a fuse that works the oil pressure gauge and the battery gauge for a 2005 chevy trailblazer


NO , there is not a fuse just for those two thing's ! There are two power supply's for the whole insturment cluster . You could need a new cluster or the ECM isn't sending this info. to the cluster . Could have DTC'S - diagnostic trouble codes stored in the PCM or the insturment cluster . Without knowing how this works (insturment cluster gets it's info.) Your best bet , take it to a qualified repair shop that has the knowledge and test equipment to diagnose this problem.
Engine Oil Pressure Gage
The instrument panel cluster (IPC) displays the engine oil pressure as determined by the engine control module (ECM). The IPC receives a serial data message from the ECM indicating the engine oil pressure. The engine oil pressure gage defaults to 0 psi (0 kPa) or below if:
• The ECM detects a malfunction in the engine oil pressure sensor circuit.
• The IPC detects a loss of serial data communications with the ECM.
For the 4.2L LL8, the ECM uses an engine oil switch that is open when the oil pressure is normal and closed when the oil pressure is low. At normal pressure, the engine oil pressure gage will display 275 kPa (40 psi). At low pressure, the gage will go to 0 kPa and the low pressure warning will be displayed in the driver information center (DIC). At high pressure, the gage will display 551 kPa (80 psi). Any values between these three values are calculated values determined by the ECM.

Voltmeter
The instrument panel cluster (IPC) displays the vehicle voltage based on the information from the body control module (BCM). The IPC uses the serial data information from the BCM to provide a voltage level indication on the voltmeter.

DTC P0521: Engine Oil Pressure (EOP) Sensor Performance

DTC P0522 Engine Oil Pressure (EOP) Sensor Circuit Low Voltage
DTC P0523 Engine Oil Pressure (EOP) Sensor Circuit High Voltage

Volt Gage Inaccurate or Inoperative
2
Install a scan tool.
Turn the ignition ON, with the engine OFF.
With the scan tool, perform the instrument panel cluster (IPC) gauges output control.
Does the volt gauge move up and down when commanded?

Aug 12, 2017 | Cars & Trucks

1 Answer

1997 olds gutless. Fuel gauge stuck past full. How to reset


Need to replace the instrument cluster or fuel gauge sending unit in the fuel tank or there is a BCM problem .BCM is a computer module if your not familiar with that . The BCM controls the instrument cluster indicators through the SPI serial data communication bus. Refer to Body Control Module System Check in Body Control System.
Serial Peripheral Interface (SPI) Data Line
The serial peripheral interface (SPI) is a three wire interface connecting the BCM to the instrument cluster. The SPI allows for the exchange of information. This interface is a synchronous serial data link where the BCM is the master and the instrument cluster is the slave. Because of the need for modules on the different serial data links to communicate with each other, the BCM acts as an interpreter, or master, for data communication between the class 2 and SPI data lines.
Driver Warning System
The BCM is responsible for the following functions:
  1. Interpreting all of the driver warnings sent by the control modules on the class 2 serial data line
  2. Sending the information to the instrument cluster in the form of a SPI serial data bus message
The following list of messages are sent by the BCM to the instrument cluster:
?€¢
Fuel gauge position


?€¢
Temperature gauge position


?€¢
Oil pressure


?€¢
Low engine coolant


?€¢
Check oil


?€¢
Volts


?€¢
ABS


?€¢
High beam


?€¢
Low fuel


?€¢
High temperature


?€¢
Washer fluid level low


?€¢
CRUISE


?€¢
BRAKE


?€¢
SERVICE VEHICLE SOON


?€¢
Door ajar


?€¢
Seat belt


?€¢
THEFT SYSTEM


?€¢
PRNDL


your best bet is to take your vehicle to a ASE certified repair shop an have it diagnosed .

Mar 02, 2016 | Cars & Trucks

3 Answers

I have a 2007 Chevy Tahoe .A light keeps coming on that says oil pressure is low. Stop the car. I took it to a local shop that checked the pressure and they said it was fine, but the instrument clust


The guage could be bad and losing connection triggering the message. My dads Tahoe reads low oil pressure but the sensor connection or stepper motor that moves the guage could and have had a history of being faulty.

Oct 01, 2014 | 2007 Chevrolet Tahoe

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Oil pressure unit on a 2001 dodge dakota v8 4.7 replaced the oil pressure unit and the oil gauge is still reading low oil in the motor is high with the dip stick. Tried to reset the sensor by disconnecting...


Your talking about low oil pressure, not level, correct? Hope you can read diagram. The top wire, oil pressure sensor should be voltage and bottom wire is ground. Use digital multimeter on low voltage setting to check. The sensor sends signal to pcm, on the right in diagram, the dashed lines. Then the pcm sends data to instrument cluster on buss circuit.
I agree with other person, it could be low oil pressure and everything else is working correctly.
oil pressure sensor-0ms4zeaf5h2emqol2ayuenrc-2-0.jpg

Jan 27, 2018 | Cars & Trucks

1 Answer

Started with Oil Pressure dropping


DTC P0521: Engine Oil Pressure (EOP) Sensor Performance

The engine oil pressure (EOP) sensor changes voltage based on the engine oil pressure. The EOP sensor is a 3-wire sensor comprising of the signal circuit, the low reference circuit and the 5-volt reference circuit. The engine control module (ECM) supplies 5 volts to the EOP sensor via the 5-volt reference circuit and provides ground via the EOP low reference circuit. The ECM monitors the signal circuit of the EOP sensor to determine the EOP sensor voltage is within the normal operating range of approximately 1-4 volts. When the engine oil pressure is high, the EOP sensor voltage is high and the ECM senses a high signal voltage. When the engine oil pressure is low, the EOP sensor voltage is low and the ECM senses a low signal voltage. The ECM sends the EOP information to the instrument panel cluster (IPC) via GMLAN serial data message.

Conditions for Setting the DTC
P0521
The ECM detects that the difference between the predicted oil pressure and the actual oil pressure is either less than 47 kPa (6.8 psi) or greater than 50 kPa (7.3 psi).

Your best bet ,take it to a qualified repair shop that has the proper diagnostic testing equipment to diagnose this.

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2 Answers

Oil pressure low at idle


Are you sure the gauge is reading correct? You also didn't mention how many miles the vehicle has. If it's less than 150k I would doubt the motor it worn out, (excessive bearing clearance would cause poor oil pressure even with high volume pump). Chevy's have a lot of issues in the dash with the motors that make the individual gauges work. I would check the oil pressure with a manual gauge. If you don't have the skills to do this yourself, a qualified shop wouldn't charge much to do it. If you find that the gauge is incorrect, there is a guy in MN that rebuilds the instrument cluster for $65 with all new stepper motors (the motors that work the gauges) and replacement of all the bulbs, plus gives it a lifetime guarantee. www.speedometerrepairguy.com.

Nov 23, 2012 | 2006 Chevrolet Trailblazer

2 Answers

My 2004 Trailblazer instrument cluster has stopped functioning. The Tach, speedo, oil press, gas, and temp guages spin irregularly and their readings at this point are meaningless. The only things that do...


Hello Mcook389,
If you have above average soldering and de-soldering skills you can perform the repair yourself.
I have repaired many GM instrument clusters and without question this issue is affecting GM instrument cluster all over the country. The particular item that is giving you the bad gauge readings is the stepper motor that drives each gauge.
Please visit my website for complete repair information if you decide to outsource the repair. www.kincerservice.com
Thanks Mike

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1 Answer

Error codes, oil pressure sensor and engine control moduale


Hello, It should actually be an oil sending unit, and is located on the back of the intake manifold to the left of the distributor. *The P0523 is Oil Pressure Sending Unit Voltage too high *P1693 Generic fault indicating a fault in the bus or PCM/ECM interface *P1682 - I can't find this code Anyways, I will post here all the error codes for future reference. 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1 Answer

Instrument cluster damaged after battery shorted out.


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