Question about 2003 GMC Yukon Denali

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How much to replace a catalytic converter on a 2003 yukon denali

How much should i have to pay to replace the catalytic converter in this 2003 yukon denali

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  • Jayboy Nov 19, 2013

    Sell the junker it is nice but not that nice

  • Frank Saucedo Mar 14, 2014

    Depends on the Cat. a universal one is about 115.00 each side. A direct fit is about 470.00 for all. This is not including labor cost. The direct fit would probably be cheaper on the labor side. The universal one, find a good welder. And it might be cheaper on parts side. More money for labor...Your choice. Ask around first...

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  • 34 Answers

I would estimate the part is about 200. Usually there is about a 75 dollar fee for installation. Muffler shop would be keeping old one as part of price.

Posted on Nov 18, 2013

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Posted on Jan 02, 2017

  • 99 Answers

SOURCE: replacing the catalytic converter on 2002 GMC Yukon

From LustyKid:

What may appear to be correct, can actually be INCORRECT. If you removed without touching the other two components, you definitely have the WRONG ONE.

Personally, I have never heard of having to remove torsion bars or oil pans to replace catalic conv.
If still in doubt. Let MIDAS do the job. Save yourself aggrevation. Unless you are really handy which you appear to be since you were able to remove it. Installing would be the reverse, provided you have the correct part. Suggest you take your vin number next time to the place where you bought it, they should be able to give you the correct one. If not, replace with OEM. Aftermarkets sometimes cause vehicle to fail emissions test. Goooooooooood Luck!

Posted on Dec 02, 2008

polarcycle
  • 1392 Answers

SOURCE: how check relay window in my yukon denali 2002,

Look for bad wires. There may also be a bad door module. Most don't have relays anymore, just modules.

Posted on Jul 29, 2009

SOURCE: locting the throttle position sensor on a 2003 gmc

The throttle position sensor is located on the throttle body. Which is in the front of the intake manifold.

Posted on Nov 29, 2009

  • 563 Answers

SOURCE: where is the coolant temperature sensor located in a 2003 yukon

It is best to allow the engine to cool down for about 3-hours before starting this job. This is for safety and convenient reasons. It also helps to minimize the loss of coolant. Coolant draining into the environment should be avoided.
After the engine cools down, disconnect the negative terminal of the battery.

Location: The Denali's engine coolant temperature-sensor is located (threaded) into the cylinder-head just above the spark-plug. It is good thing to remove the spark plug wire in the coolant temperature-senor's immediate area. This will allow more room to work it out.

It is removed by first undoing its electrical plug, and then using a deep socket with wrench to loosen the coolant temperature-sensor.
Once done, verify that the electrical connector is replaced in its proper location. Then coonect back the negative battery terminal.

Posted on Dec 15, 2009

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SOURCE: How do I remove and replace the power side mirror

2003 GMC Yukon - My power mirrors stopped working.... all fuses have been checked and they are all good. Any ideas? These are the power folding mirrors. The function that allows you to fold them in for car washes etc still works.... they just will not adjust when you change drivers, or when you try to adjust them with the controls. Any ideas would be appreciated!

Posted on Mar 19, 2010

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1 Answer

Where is the oxygen sensor located in bank one on 2002 yukon Denali


Bank one is the drivers side. If it is bank 1, sensor 1 the it is in front of catalytic converter...if it is bank 1, sensor 2 then it's the sensor behind the converter on the drivers side

Jul 15, 2014 | 2002 GMC Yukon Denali

1 Answer

Where is the up stream o2 sensor in the chevy venture?


One of the easiest ways to locate the upstream sensor is to follow the exhaust line from the engine towards the catalytic converter. In most vehicles, the upstream sensor is close to the exhaust manifold compared to the catalytic converter.

Apr 16, 2013 | 2007 GMC Yukon Denali

1 Answer

I have a 2002 yukon denali. Somehow my viper alarm needs reset. I cannot start the truck. When I replaced the car battery it was fine. Now when I press the buttons on my remote it does not do anything....


Your 2002 Denali is equipped with a security system from the manufacturer. The installation of aftermarket security systems such as the one you are describing is just trouble waiting for a place to happen.

General Motors has published several Technical Service bulletins regarding such aftermarket equipment and warns of the problems that can occur including No-Start conditions, trouble with the keyless entry system, engine misfire problems, transmission shifting problems and severe damage to high-dollar parts like catalytic converters.

My professional recommendation is to remove all of the aftermarket equipment from the vehicle and resore the vehicle wiring harnesses to a condition that would be acceptable to the people that built the vehicle.

Nov 26, 2011 | 2003 GMC Yukon

1 Answer

Code of PO174 1 system too lean (bank 1) Code PO420 Catalyst efficiency below threshold (bank 1) Code PO430 Catalyst efficiency below threshold (bank 2)


hi,my friend, you can try,

Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.

Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).

Inspect the downstream heated oxygen sensor (HO2), replace if necessary

Replace the catalytic converter

Sep 14, 2011 | 2003 GMC Yukon XL

1 Answer

Ignition light went on I checked code and it says heated catalyst efficiency below threshold(bank2) where is this located and what do I have to do to fix it.


This code is saying that your catalytic converter is no longer doing it's job. You would need to replace the catalytic converter to get this light to go out.
A new converter assembly from a GMC dealer is around $500, and the labor is 1.4 hours to replace it, plus miscellaneous gaskets and/or clamps. If the labor at your dealer is $100/hour, you're looking at about $650-700 for this repair. You may be able to get it done cheaper with aftermarket parts at an independent shop. I would suggest that you call around and get quotes before bringing it in.

Oct 19, 2010 | 2003 GMC Yukon Denali

1 Answer

Where is bank one oxygen sensor located at on a 2003 yukon


Need more information but here is where all your O2 sensors are located
Bank 1 Sensor 1 - Driver's side, before catalytic converter Bank 1 Sensor 2 - Driver's side, after catalytic converter
Bank 2 Sensor 1 - Passenger side, before catalytic converter
Bank 2 Sensor 2 - Passenger side, after catalytic converter

Thank you for using fixya and good luck

May 13, 2010 | 2003 GMC Yukon XL

1 Answer

2003 yukon denali. Speedometer broke. What needs


can you be more specific than "broke"...... does the odometer work? do all the other gauges work? if not, are they accurate.

Oct 15, 2009 | 2003 GMC Yukon Denali

1 Answer

Power and fuel mconsumption


If you replaced the plugs, did you replace the plug wires. Even though they are short wires from the coil to the plugs they can go bad. How is the air filter? Have you replaced the fuel filter?

You have four oxygen sensors on your truck. one on each side pre catalytic converter and one after each converter. It is a very pricey replacement because all of the O2 sensors are four wire.

If you change the sensors, your pcm (vehicle computer) will detect the change in readings very quickly. If you really want to ensure the computer completely relearns you need to disconnect the ground for at least 10-30 minutes. When you reconnect the battery the computer will return to its baseline from the factory. It will immediate begin the adaptive learning process to perform in accordance with your driving style.

Another thing to consider is cleaning the mass air flow sensor. This is a very delicate piece of sensor and requires a special cleaner. STP and GUMOUT both sell a specific product for the cleaning of the MAF. Follow the directions. I would be especially concerned if your usinga K & N air filter as the oil from the filter will sometimes coat the MAF and resulting in bad readings.

Good luck.

May 11, 2009 | 2003 GMC Yukon Denali

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