Question about 2005 GMC Envoy
Hello Kammy ,you have electronic problems ! Your best bet would have it towed to a qualified repair shop .
SERVICE BRAKE SYSTEM
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
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
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
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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