Question about 2004 Chevrolet TrailBlazer

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Instrument gauges gauges malfunction

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A common issue with 02-07 trailblazers. Look for a local shop specializing in gauge repair or find one on the web. Prices are usually reasonable compared to dealerships. There are also some sites that offer diy kits if you are willing to try the repair yourself. Some knowledge of soldering is a must, but repair can be accomplished. Good luck. Ron @ Speed-O-Repair.

Posted on Aug 19, 2014

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How do I check and replace engine oil sensor.


Knowing how these gauges work , I'd say you have an instrument cluster problem not oil sender unit. 2003 - 2006 GM had bad stepper motors in the instrument cluster . If there was a problem with the oil sender the gauge would default to zero .
Engine Oil Pressure Gage
The instrument panel cluster (IPC) displays the engine oil pressure as determined by the powertrain control module (PCM). The IPC receives a class 2 message from the PCM indicating the engine oil pressure. The engine oil pressure gage defaults to 0 kPa (0 psi) or below if:
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The PCM detects a malfunction in the engine oil pressure sensor circuit.

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The IPC detects a loss of class 2 communications with the PCM.

If you don't know what class 2 serial data communications are ,google it. How to repair GM Instrument Cluster Speedometer Gauge Stepper

Dec 23, 2015 | 2003 Chevrolet Silverado 1500

1 Answer

Code that came up on the OBD is P0463 Fuel level sensor A circuit high input what does that mean and how can it be fix?


DTC P0463 - Fuel gauge sender unit circuit high input
• The PCM monitors the fuel tank level and input voltage from the fuel gauge sender unit when the engine is running. If the input voltage is more than 2.5 V and fuel tank level is empty, the PCM determines that the fuel gauge sender unit circuit input voltage is high.

Diagnostic support note
• This is a continuous monitor (CCM).
• The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.

Possible cause:
• Fuel gauge sender unit malfunction
• Instrument cluster malfunction
• PCM malfunction

Feel free to contact us if need additional details. Good luck.

Sep 08, 2011 | 2001 GMC Yukon

1 Answer

2006 envoy heat air in off position, driving , air con will turn on and shows on display. also gas gauge is erratic , will show empty or close to when it is not. I believe I will have to replace gauge /...


Although my first impluse is to tell you to do is to drop the tank and check the fuel pump and level. All GMs have had a terrible record with their instrument panels for 2002-2006, so think back and try to remember if you have any other malfunctions with the instrument cluster. If you have, then I would look on the internet and find the places that have made a specialty of rebuilding GMs instrument clusters and have them rebuild it completely.

Sep 01, 2011 | 2006 GMC Envoy Xl

1 Answer

My 2004 Sport Trac gauges jiggle and won't make the connection to register. This is an intermitent problem. It happens when the vehicle is parked or moving. The battery & terminals have been...


I'm having about the same issue. I've traced it to a problem behind the instrument panel/cluster. You will need to or have a mechanic pull the instrument panel and check to see what is causing the gauges to malfunction. I can tap on the instrument panel and everything comes back. There is a short of some sort.When I find out more, I'll post. Good luck

Aug 09, 2011 | 2004 Ford Explorer Sport Trac

2 Answers

The speedometer gauge and RPM gauge is not working. The speedometer gauge goes to the max while I am driving. The car itself seems to be running ok. Help! It is a Yukon Denali 2005.


I suspect that your sender is malfunctioning. Todays speedometers and RPM is sent from a sensor/sender near the drive shaft. A magnet on the drive shaft is sensed and the revolutions are converted to RPM and speed.

For information see:

http://wiki.answers.com/Q/Speedometer_on_2003_Yukon_XL_doesn%27t_work_most_of_the_time_is_this_a_common_problem_how_much_to_fix_it

Jan 09, 2011 | 2003 GMC Yukon Denali

1 Answer

Speedometer drops to zero while moving and then


The Vehicle Speed Sensor located on the Transmission is malfunctioning or the connection is malfunctioning.
It is very easily removed and replaced.
The Vehicle Speed Sensor sends vital information for the Transmission to properly Shift. Because yours is malfunctioning, this lack of information is causing shifting problems.
I do not know if you have a Mechanical or Electrical (Gauges or Digital) Instrument Display. I also do not know if you have a 17 or 19 bolt transmission pan, nor what type of transmission you have (AX4N or AX4S) Nor if you have a Speedometer Cable (Mechanical Instrument will have Gauges=Cable).
The best thing to do is to check the connections of the Vehicle Speed Sensor. Unplug and check both sides of the connection for corrosion/oxidation. You can also take this sensor out of the transmission and clean the interior end; reinstall and recheck operation.
If this does not fix the problem, then remove and replace this snsor.
Take the Sensor with you to the auto parts store to compare the part you receive. You should know what tansmission you have and the number of bolts on the transmission pan, and whether you have an Electronic (Digital) Instrument Panel or Mechanical (Gauges) Instrument Panel on your dash.
Let me know if this helped, or if you have additional information or questions. Feel free to contact me at FixYa.com!

Feb 17, 2010 | 1997 Mercury Sable

1 Answer

1995 Honda Civic fuel gauge always shows full. I removed instrument cluster and moved gauge down by hand. The needle moves back to full when key is switched to acc position. I found no loose wires or bad...


Well, theres a sending unit/float in the tank that sends a signal thru wires to your instrument cluster's fuel gauge. You should have an auto electric repairperson determine where your problem lies. It's not often the needle's just 'stuck' to where you could dislodge it. More often, it's pegged overfull or underempty-signaling a shorted component upstream of the gauge.

Similar problem and found the solution:
In the back of the gauge, where the 2 coils are located, there are very tiny copper wires which connect all the resistors/diodes. they each travel from within the coil and are soldered to 3 out of the 4 mounting pins. if any of these wires are shorting out or disconnected, the gauge will malfunction.

- take the gauge and flip upside down
- temp gauge has 1 resistor (blue) and 1 diode (copper)
- fuel gauge has 2 resistors, no diodes
- 1 wire should be attached to bottom mounting pin (letter E for EMPTY)
- 1 wire should be attached to pin holding both resistors (half tank)
- 1 wire should be attached to the stand-alone ground pin (no mounting bracket)

Hope that helps!


Oct 19, 2009 | 1995 Honda Civic

2 Answers

2003 buick rendevous speedometer gauge malfunction it goes up to high for rpm


Pretty common problem with these. Here's a guide to learn how to fix GM instrument clusters yourself, I used it to fix mine and it worked great.How to guide for Rendezvous instrument cluster repair

Oct 08, 2009 | 2003 Buick Rendezvous

2 Answers

Dash instrument panel not working continuously


From 2003-2006 GM installed faulty stepper motors for the instrument panel gauges on a lot of their models. Revised stepper motors are available. Each gauge uses one motor.
Common problem with turn signal malfunction is the 4 way hazard switch.

Jan 14, 2009 | 2004 Chevrolet Impala

1 Answer

Instrument gauge misreading


I don't know which gauge,or how you know it's not reading correctly,but the way i would determine a gauge's accuracy is with a scan tool that will read the data stream in your vehicle's computer(s).For example, suspected malfunctioning coolant temperature gauge,go into engine data and look at the coolant temp reading that the PCM (powertrain control module) is actually seeing from the sensor,and compare that value with what the gauge is reading.

Jul 18, 2008 | 2003 Cadillac Escalade

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