GMC Envoy - Recent Questions, Troubleshooting & Support


2005 GMC Xl doesn't appear to have an orifice tube where you'd expect to find it, -in its normal location.

Suggestion: if the fluid looks good inside the receiver/Dryer and the pressure is within range, send it.

Otherwise you're probably looking at a failed compressor and a clogged core or condenser at this age of the vehicle.

2005 GMC Envoy | Answered on Jul 17, 2020

try changing out the PCM. its responsible for transmission operation. bad PCM means dumb transmission.

GMC Envoy Cars &... | Answered on Jun 20, 2020

Fuse number 13 is the cigarette lighter fuse, it is in the engine compartment fuse box on your GMC Envoy. To know more about where each fuse is and what it does, follow this link:

2003 GMC Envoy | Answered on May 25, 2020

Firing order is 1, 5, 3, 6, 2, 4. Number 1 cylinder is up front. Why would you need the firing order, this engine does not have plug wires, each plug has its own coil pack, each coil pack is controlled by the computer.

GMC Envoy Cars &... | Answered on May 25, 2020

I did the procedure vehicle still didn't start.I did notice the security light did no blink but stayed solid before it when out.Im lost ..

GMC Envoy Cars &... | Answered on Dec 29, 2019

The carbon cannister hoses may be cracked, there might be a rubber fuel line hose leaking too.

2003 GMC Envoy | Answered on Nov 15, 2019

Make sure it's not on the sepentine belt causing it to slip . Possible that it got into a connector I guess . Check that you didn't bump into a connection also .

2003 GMC Envoy | Answered on Oct 28, 2019

Do NOT use it on road you will brake something
Is it switches or leavers for your controls

2005 GMC Envoy | Answered on Oct 28, 2019


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

Under the rear seat, drivers side.
Black box you will need to remove the cover.
Please rate this solution.

Btw, I’m available to help over the phone in case u need at

2006 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

watch this video it will help you to remove rear spoiler.

2003 GMC Envoy | Answered on Aug 24, 2019

This would be the shift linkage bushing, very common. When switching through the gears, the gear selector lights in the dash probably don't move from P.

2003 GMC Envoy | Answered on Aug 21, 2019

4.2L Engine the thermostat and the neck where the hose goes on is one unit $25 at autozone
  1. Remove the necessary coolant from the radiator.
  2. Remove the alternator, Loosen the outlet hose clamp at the thermostat housing. Remove the outlet hose from the thermostat housing.
  3. Remove the thermostat housing bolts.
  4. Remove the thermostat housing from the engine block.
  5. Clean all of the surfaces of the thermostat housing.
  6. Clean the sealing surface of the engine block.

2002 GMC Envoy | Answered on Aug 06, 2019

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