Question about 2005 GMC Envoy

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My 2005 GMc envoy stopped when I stopped at stop sign the service brake system warning keeps coming on when push brake pedal. Gear shifter won't move out of park and it will not start.

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Hello Kammy ,you have electronic problems ! Your best bet would have it towed to a qualified repair shop .
Refer to Brake Warning System Description and Operation !
The instrument panel cluster (IPC) illuminates the brake warning indicator when one or more of the following occurs:
• The body control module (BCM) detects that the park brake is engaged. The IPC receives a class 2 message from the BCM requesting illumination.
• The electronic brake control module (EBCM) detects a low brake fluid condition. The IPC receives a class 2 message from the EBCM requesting illumination.
• The EBCM detects an ABS malfunction which disables dynamic rear proportioning (DRP). The IPC receives a class 2 message from the EBCM requesting illumination.
• The IPC performs the bulb check at the start of each ignition cycle. The brake warning indicator illuminates for approximately 3 seconds before turning OFF.
• The IPC detects a loss of class 2 communications with the BCM or with the EBCM.

When there are electronic problems the computers will not allow the vehicle to start , hooking up a factory or professional scan tool to see what the problem is is the first place to start .

Posted on Apr 14, 2017


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Posted on Jan 02, 2017



  • 11 Answers

SOURCE: 2002 GMC Envoy Stuck in Reverse

broke cable

Posted on Sep 13, 2008


  • 74 Answers

SOURCE: Engine will not turn over or start when in park with key on.

You linkage is working properly it sounds like, especially if the indicator for "D, R, N", etc are lining up. However the linkage or the neutral safety switch may need to be adjusted. More than likely, it's your neutral safety switch.

The brake pedal release has nothing to do with the neutral safety switch when switching gears.

The brake pedal release is just a safety to prevent you from pushing the gear shifter accidentally. Actually, you should be able to start the truck without holding the brakes.

If the neutral safety switch is bad or misaligned, it'll do exactly what you're describing. If pulling it down in neutral starts the truck, then that's a sure indicator.

Posted on Feb 10, 2009


  • 43 Answers

SOURCE: the gear shift on my 2004 gmc envoy does not move from park.

cheak the brake pedel swich it work a swich in the gear seleter

Posted on May 26, 2009

john h

  • 22486 Answers

SOURCE: gmc yukon has the abs & parking brake light

you have to fix the problem with ur brakes- first check the wiring ,connectors and connection clips to the abs sensors and modulator if looks ok than have truck scanned some auto stores such as auto zone / advanced auto do it for free the code will give u a start point towards fixing ur problem--visual inspection of brakes doesnt always show problem

Posted on Nov 26, 2009


  • 2 Answers

SOURCE: 04 Trailblazer Will not shift out of park.

Sounds like the cable from the shifter to the transmission probable snaped. It happened to me at the emission inspection station. What a nightmare. To check this you will need some help. Have someone set in the car and apply the brakes as well as the emergency brake just incase. Get under the truck and find the cable from the shifter to the transmission. Have the person in the truck move the shifter lever from park to another gear. If the arm where the cable attaches to the transmission does not move when the lever is moved it is the cable. They are relitively cheap and you should be able to replace it yourself.

Posted on Mar 30, 2011

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The car has an interlock system that prevents you from shifting without putting your foot on the brake ..The brake pedal switch not only controls the stop lights, but also sends voltage to an actuator that unlocks the gear shift. Check the brake pedal switch for failure or loose connections or blown fuse that feeds that circuit . If you look in your Manuel there is a way to override and unlock the gearshift incase of voltage failure.

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My mechanic tells me I need a new interlock shift in my 2002 GMC Envoy. On ocassion, I need to pump my brakes a few times before I am able to move my gear from park to drive. The shifter is cheap but the...

Before any parts are replaced, it needs to be determined if the brake pedal switch is being actuated properly and functioning properly. After that, the interlock solenoid needs to be checked, as well as the linkage.

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I changed the brakes on my 2004 GMC Envoy. Everything is good accept the service brakes light is on and won't turn off. How can I turn it off?

Do you have a good brake pedal, does it hold when pushed? Is the ABS light on too?
There may be air in the brake lines, there may be dirt in the lines. Have you tried bleeding the system?

Sep 20, 2011 | 2004 GMC Envoy

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Not too familiar with Peugeot but every car I've worked on has a switch that's actuated by the brake pedal. look up underneath the dash near the brake pedal pivot point with a flashlight you should see a switch that is actuated when you push the brake. you may have a bad switch or wire, easy to check with a volt/ohm meter. it may even be misaligned. This can can also stop your shifter from moving out of park. If your brake lights don't come on one of the above is your problem. Hope this helps.

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Gear shift will not move from park

First thing to check is your brake lights. The brake interlock for the shifter relies on the switch that turns your brake lights on. If it's not working, you won't have brake lights OR the ability to move the shifter out of park. In an emergency, most of these vehicles have a small plug near the shifter that you can remove, push a button, and move the shifter without pushing the brake pedal.

Good luck.

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Igniton key is stuck in switch and won't turn off

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The gear shift on my 2004 gmc envoy does not move from park.

cheak the brake pedel swich it work a swich in the gear seleter

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