20 Most Recent 2004 GMC Envoy Questions & Answers


Instrument cluster erratic warning lights, gauges stop working.

This is a common problem with an easy fix. If you are experiencing weird behavior from the instrument cluster it quite possibly is caused by corrosion on the circuit board on the back on the instrument cluster. To fix this you need to remove the instrument cluster. Refer to YouTube for this there are lots of videos shopping this, This step is much easier than it sounds, there are 4 screws and one plug. Inspect the circuit board you should see about a dozen places that have a dusty/crusty appearance (see the attached image). Clean the corrosion using isopropyl alcohol and a cotton swabs. Reinstall the cluster and your good to go.

on Oct 15, 2019 | 2004 GMC Envoy

Natalie, our 4.2 engine only likes 1 sparkplug. AC Delco 41-103. This Iridium plug comes pre-gapped, to near the specs Mike posted. Don't try and gap these particular plugs yourself, easy to ruin them.

2004 GMC Envoy | Answered on Sep 20, 2019

Try stepping on the brake when trying to shift with the key on. Then try starting im neutral or other gears to see if the neutral safety switch is bad in park. You may have a bad wire from the battery to power distrubution or bad ground. So many things it could be.

2004 GMC Envoy | Answered on Sep 14, 2019

There is a technical service bulletin regarding this problem with 2004 GMC envoy. Actually there are 3 separate issues with regards to the elecronic tailgate. The reason why the dealers are backordered is the part you want keeps failing after a time of being installed.

For the particular problem you have of the electronic latch not working, the bulletin recommends a inspection of the endgate connector C900. Look for the wires to be backed out of the connector or not properly crimped. To crimp you will need a crimping tool available at any electrical supply shop. The connectors can be had from the dealers.

The other solution referred to intermittent operation of the endgate but can apply in your situation also. For that, look for chaffing at the wire harness connectors for the endgate actuators located at the upper right and lower left latches. They have been found to be pinched up to 8 inches away from the actuators. In this situation it would be ideal to replace the connectors and install in a way so wires will not be pinched.

The other thing to look out for is dusty sensors. For this you will need to remove the tailgate trim panel and locate the 2 optical sensors on either side. You can feel them with your hand, they will be the size of a nickel. Clean all the dust under the trim. In addition to that you should open the switch and use contact cleaner to clean out any dust or debris inside there. There is no mechanical way to open the door once the electronic side has malfunctioned without damaging the door. I hope this helps.

2004 GMC Envoy | Answered on Aug 26, 2019

Below are some diagrams for you. If you have the XL model there it will be different for the rear passenger compartment fuse panel which I did not include. I did include if you had a 6 or 8 cylinder engine for the under the hood fuse panel because there is a difference. This should be in your owners manual if you have one. If you do not and would like a copy, you can email me at [email protected] with your make, model and year and I will be happy to email you a copy. I hope this helps and good luck.




2004 GMC Envoy | Answered on Jun 10, 2019

yes pulley free wheels--- when clutch is engaged [turn on ]then compressor is turning as well

2004 GMC Envoy | Answered on May 08, 2019

I know this question is old, but I am responding so others with the same problem can see. I wired the Rear Window Motor Park Signal wire and the Rear Window Motor Speed Signal wire together and it completely bypassed the rear wiper motor. Now the window goes up and down. This doesn't fix the rear wiper motor, but you will be able to have access to it now that the window is out of the way

I made and album to show.


2004 GMC Envoy | Answered on Mar 30, 2019

Temperature blend door actuator is probably stuck on heat position , needs replacing more then likely. Videos on youtube showing how to replace it .

Now as far as it shutting down , that could be any number of thing's , could cost a lot of time an money tracking that down . It would be best if when it shut off it wouldn't restart ,easier to fix that way .

2004 GMC Envoy | Answered on Feb 23, 2019

I got this free Pdf manual from reliable-store for free and I don't think Ive visited a mechanic or fixya for help for more than 3-4 times out of the 20 times I fixed the chipper in these 4 years

2004 GMC Envoy | Answered on Feb 07, 2019

the wiper switch may be defective

2004 GMC Envoy | Answered on Feb 01, 2019

This is why walmart and others sell a wiring kit that plugs one end into the stock wires and the other to your radio, One hot ware goes to always hot wire for clock and station presets, other goes to switched ignition so radio goes off with the key.

2004 GMC Envoy | Answered on Aug 22, 2018

If I understand your question you are looking for the A/C drain tube location.
Here is a picture of it.

ac drain tube location-pw4u2tzywx1kw2dczoxm2brj-5-0.jpg Hope it helps.

2004 GMC Envoy | Answered on Aug 21, 2018

I also have a 2004 GMC XUV. My gate would go down but not swing open. In trying to fix it, the gate then refused to go to the flat position.I have removed the cover plate on the gate and found the one of the solenoids loose from its mounting. Resetting the computer by disconnecting both battery leads and holding them together for ten seconds worked to restore function to the gate going flat, but the swing still does not work. I believe it is a bad solenoid or motor for the bottem left latch pin.

2004 GMC Envoy | Answered on Jul 29, 2018

Rule one thing out.... make sure you're coolant reservoir is full

The compressor has a thermal switch, if it gets too hot in the engine bay, will turn off, then back on when it's cooled off.

2004 GMC Envoy | Answered on Jul 20, 2018

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