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2006 GMC Envoy Electrical Problems



1. Gas gauge erratic after fill-up

2. Seat heating turns off on both front seats and does not go back until car restart.

3. Door locks and windows work off and on.

4. Pre-programmed driver seat position stops working and seat forward/backward stops intermittently.

5. Check engine light comes on intermittently.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 2 Answers

SOURCE: The drivers seat is stuck.

Our 2002 has had this problem twice. The first time, we removed the 4 bolts holding down the seat, and jiggled the seat - it started working on it's own. The second time, the seat was too far back to get to the rear 2 bolts. We removed the front 2 bolts and tried to tap the motor - to no avail.... Later that day, the seat started to move again - but one side was stuck, and it seemed to have stripped a gear. Now it looks like a trip to the dealer...

Posted on Jul 28, 2008

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  • 11 Answers

SOURCE: 2002 envoy

heater element in seat

Posted on Sep 13, 2008

  • 1 Answer

SOURCE: Gmc Envoy 2004 Seat heaters

I have the same problem with my 2004 HD Sierra. I found that the "MBEC" 50 amp fuse in the under hood fuse box had blown. Replaced that and it works now. This has happened twice in 2 years.

Posted on Dec 30, 2008

  • 232 Answers

SOURCE: 2002 Envoy Forward / Back seat motor no longer functioning

First of all did you check the fuses? There should be one for the seats. If they're ok then get a Haynes Repair Manual for your 02 Envoy it'll probably even have illustrations showing you how to do it. Its my best advice, you can get one from just about any auto part store.

Posted on May 01, 2009

  • 15 Answers

SOURCE: rear seat fuse box in 7 seater 2006 GMC envoy denali

Rear fuse box is under the seat bottom, rear seat (middle row) on the driver's side. There is a plastic cover over the top of it that snaps into place.

Posted on Jun 20, 2009

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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

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I have a GMC 2005 3500 diesal allison trans truck. 1. The speedometer is only working part time. 2. The door panel control for the driver side heated seat won't stay on. What part do I need to fix the...


The speed o meter not working correctly is probably the result of a bad stepper motor inside the instrument cluster . GM had bad step motors from 2003 to 2006 . How to repair GM Instrument Cluster Speedometer Gauge Stepper .
The problem with the heated seat is more then likely bad heating elements . Testing the electrical circuit is the way to find the problem . CHEVY GMC SEAT HEATER TROUBLESHOOTING YouTube

Feb 11, 2018 | 2005 GMC Sierra

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Gas gauge problems


Common problem on the 03-06 Envoy instrument clusters for the fuel gauge to go out. It's usually caused by one of two main problems, either the stepper motor on the cluster's circuit board is going out or the sending unit on the fuel pump is going out. Check out this blog post about the problem - Envoy fuel gauge problems

Jun 13, 2009 | 2006 GMC Envoy

2 Answers

Rear seat fuse box in 7 seater 2006 GMC envoy denali


Rear fuse box is under the seat bottom, rear seat (middle row) on the driver's side. There is a plastic cover over the top of it that snaps into place.

Jun 12, 2009 | 2006 GMC Envoy Denali

1 Answer

Gas gauge inoperative


The sending unit in your tank is bad replace it.

Jun 04, 2009 | 2006 GMC Envoy

1 Answer

Power front seats


Before you start beating up thing's , test the electrical circuits. Do you know anything about automotive electrical systems ? How to use a volt meter an a wiring diagram to test for B+ power to the switch an testing the ground .
Does your envoy have memory seats ? Your vehicle has four or more electric motors to control back an foward , up an down etc.. the odds of more then one motor being bad at one time are highly unlikely .
Look under the seat any trash under there keeping it from moving ?
If you have memory seats there is a control module involved in making the seats work . If it has memory seats it could have DTC'S - diagnostic trouble codes .
DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820
The seat adjuster switches are inputs to the driver and passenger seat modules. The seat modules supply the adjuster switch assemblies with a battery positive switch supply circuit and monitor the switch signal circuits. In an inactive state the switch signal circuits are floating and when a switch is pressed the signal circuit is closed to the switch power circuit within the adjuster switch assembly. When battery voltage is present on the switch signal circuit the seat module determines the switch status to be active.
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Jun 26, 2017 | 2002 GMC Envoy

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2006 GMC Envoy XL gas gauge reads empty after filling, then slowly moves up after driving but will continue to lose pressure until it reads empty and the light is on, then the check engine light came...


Sending unit. Its all one unit including fuel pump, float, ect. The check engine light is because of the high or low resistance in the unit. Let me know if you have already fixed.. You have to drop the tank to get to it also.

Feb 24, 2009 | 2005 GMC Envoy Xl

3 Answers

Fuse Box Location 2006 GMC Envoy


Under the rear seat, drivers side.
Black box you will need to remove the cover.
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Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/jason_77a19afa8d604dee

Feb 10, 2009 | 2006 GMC Envoy

3 Answers

Power front seats


Use a hammer and tap each of the travel rails on seat, this worked great for me, something just gets misaligned in there.

Nov 09, 2008 | 2002 GMC Envoy

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