Question about 2004 Chevrolet Tahoe

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2004 Chevy Tahoe - Reduced engine power message

While driving down the highway, my 2004 Chevy Tahoe displayed a reduce engine power message. The accellerator pedal at that point had no effect on the engine even though it was still running. My manual told me to check the gas cap by lossening it then retightening it. It corrected the problem for about 30 miles, then the solid engine light came back on with the same message. After going through the gas cap procedure again several times, the light and message warning went out. I made it home but am concerned about driving the vehicle for any distance at all now. What may be the problem. There are no service or warning lights that are on.

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  • CAnUss Nov 20, 2008

    i have a 05 malibu, that same code popped up on my dash and my check engine light and my traction control came on.  I had no power at all the car would idle fine but when it came time to go it wouldnt run at would run but really slow and powerless...i havnt taken it to the dealership or a mechanic because it comes and goes...i was told it might be a wheel sensor or my APP (accelerator pedal position) 

  • brickhead Dec 16, 2008

    I have a

  • lxtreme18 Mar 17, 2009

    I just had the same issue with my 04 Avy and the dealer said it was the throttle connector. Seems to run fine now

  • lxtreme18 Mar 17, 2009

    I just had the same problem with my 04 Avalanche. Drove it waaaay to a dealer on the other side of town with the limited speed (pain in my ***) but they found the problem. It was the throttle connector. Avy back to normal now.

  • Anonymous Mar 22, 2009

    scanner says app sensor malfuntion no power

  • rocz May 12, 2009

    i have the same problem but it happens to me whenever i hit a bump or a pothole. i would turn off the engine and wait a few seconds and it would be fine but the check engine light stays on thou. does any one know why it does this?

  • Anonymous Mar 12, 2014

    turned off engine, turned ignition back on, to read message again. but there were no power not even dash board lights. replaced battery checked it was the correct one. Still nothing.

  • Anonymous Mar 14, 2014

    2004 chevy tahoe service tire moniter message on

  • Aquiles Dec 15, 2014

    check ur alternator desconect the positive cable from the battery if or truck keeps on ur good but that truck has to be on


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Have autzone check for any stored trouble codes, replace the fuel cap, make sure you have plenty of gas

Posted on Jul 25, 2008

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Posted on Aug 14, 2013

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SOURCE: While driving down the highway,

you should take to shop to have any codes pulled from vehicle autozone will do it for free. let me know please and give feed back.

Posted on Jan 31, 2009

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SOURCE: check engine light

The gasket or large o-ring on the under side of the cap might be warn not keeping a tight seal. replace gasket or o-ring, or get a new cap, and see if that cures it.

Posted on Jan 31, 2009

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1 Answer

I push the gas pedal on my 2004 CTS and it does not go what is the problem

Your caddy has Electronic throttle control ,drive by wire ! Do you know what this is ? You gas pedal ,if you look at it has wires connected to it .These wires hook up to the engine computer ,the engine computer has more wires that hook up to a dc electric motor under the hood on the throttle body which open an close the throttle plate ,which makes the vehicle go faster or slow down !

Are there any messages on your dash REDUCED POWER ? Check engine light lit ?

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I just had the transmission in my 2004 trailblazer

There is a harness in the engine compartment that has grounded out or shorted. The message 'reduced power' will flash across your driver information display on your gauge cluster. This is somewhat of a common problem for full size Gm trucks (silverado, tahoe, suburban, etc .) and trailblazer/envoy vehicles.

Sep 26, 2014 | 2004 Chevrolet TrailBlazer

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My 2003 chevy tahoe will not accelerate pass 30mph what could be the problem?

Your problem could be in the Transmission, but most likely it is caused by a sensor / electric part called an Accellerator-Pedal-Position-Sensor (APP-Sensor. If it is the APP Sensor, then you should be getting a signal in the information center saying "reduced power" or a Check-Engine Light.

Aug 29, 2012 | 2003 Chevrolet Tahoe

1 Answer

Got a display message "Reduced Engine Power" the

When you receive this message it means that the computer has put the engine and components into protection mode. This computer has done this to prevent any further damage to the engine or transmission. You have to have the computer of the vehicle scanned to find the problem then you need to get it fixed right away. It could be a number of different causes overheating,Low Oil Pressure,Transmission pump problem, low coolant level, low oil level. Their is really no way of telling from this end without seeing the vehicle.Start by checking all fluid levels, Oil,Coolant,Transmission.If all this is good scan the computer with a OBII scanner or take it to a garage and get it scanned. It may just be something simple or it could be something very serious.Do not drive the vehicle it is worth the cost of a tow truck to prevent further damge if you can not determind the cause and fix it yourself.

May 09, 2011 | 2004 Chevrolet Tahoe

1 Answer

The check engine light keeps coming on in my 2004 Chevy Tahoe. At first when it came on, it would show a warning message that states Reduced Engine Speed and the Tahoe wouldn't have any power. Now, it's...

Most auto parts stores have Scanners that can read the actual Codes causing the check engine light- usually for FREE. Google the Codes to determine what needs fixed.

Do not continue to drive it, as it may cause permanent damage!


Jul 23, 2010 | 2004 Chevrolet Tahoe

1 Answer

I have a 2003 Chevy Tahoe. No problem this

have the codes pulled this will get you in the right direction most autozones and the like do it for free

Dec 15, 2009 | 2004 Chevrolet Tahoe

1 Answer

Check engine light

The gasket or large o-ring on the under side of the cap might be warn not keeping a tight seal. replace gasket or o-ring, or get a new cap, and see if that cures it.

Jan 31, 2009 | 2004 Chevrolet Tahoe

2 Answers

04 chevy tahoe

the check engine light you are getting sounds like and electrical problem, have the battery and the alternator tested, and have autozone or the like pull the codes off for you and see if you can figure out what they are....

Jul 06, 2008 | 2004 Chevrolet Tahoe

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