20 Most Recent 2009 GMC Envoy Questions & Answers


The oil filter on the 2010 GMC Terrain is located in the engine compartment. You'll need a short depth 1-1/4" socket wrench to loosen the cap. The cartridge is in the canister under the cap.
2010 gmc_terrain-flnatfuu5vnw04sfvkkswjzt-3-0_0.jpg

2009 GMC Envoy | Answered on Feb 02, 2018


The oil filter on the 2010 GMC Terrain is located in the engine compartment. You'll need a short depth 1-1/4" socket wrench to loosen the cap. Loosen cap and remove to access oil filter cartridge.
2010 gmc_terrain-flnatfuu5vnw04sfvkkswjzt-3-0.jpg

2009 GMC Envoy | Answered on Feb 02, 2018


Do you know anything about automotive electronic's ? computer controlled systems ? There is electronic control modules in side the doors of your vehicle that control the operation of the windows an lock's , plus the instrument cluster is a module too . Your vehicle has about 10 different control modules and thet are all hooked on a serial data communication network ,to share info. The fuel tank sending unit in the gas tank is wired to the PCM - engine computer , The PCM sends fuel level info to the gauge in the instrument cluster on this serial data network . Your best bet ,take an have the vehicle checked out by a qualified repair shop .
The power door lock system consists of the following components:
• Driver Door Module (DDM)
• Passenger Door Module (PDM)
• Liftgate Module (LGM)
• Door lock relay
• Door unlock relay
• Body Control Module (BCM)
• Reversible door lock actuators in each of the doors
• LR/RR LOCKS 10A fuse (relay supply voltage)
• Door lock switches in driver and passenger doors (switches are integral components to the DDM and PDM)

Power Door Lock Operation
The power door lock switches are integral components of the DDM and PDM. The switches are two position normally open rocker switches. When placed in either the lock or unlock positions, the switches provide a direct input to the DDM or PDM. The DDM or PDM monitors these inputs and sends a Class 2 message indicating a change in the switch's respective position. Modules which activate the power door lock motors receive the Class 2 message and activate the motor in the appropriate direction to lock or unlock the vehicle's doors and liftgate. The modules which activate the power lock motors are:
• DDM (driver door lock actuator).
• PDM (passenger front door lock actuator).
• BCM (both rear door lock actuators).
• LGM (liftgate door lock actuator).
The DDM, PDM and LGM are directly connected to the respective door lock actuator through the door lock motor lock and unlock circuits. Once a door lock or unlock request has been received, the module will supply battery voltage to one side of the actuator and ground the other causing the doors to lock or unlock.

The modules probably have DTC'S - diagnostic trouble codes stored , these would point a auto tech in a positive diagnostic direction .

2009 GMC Envoy | Answered on Oct 30, 2017


Hi. There is an option to forget bt devices. Forget all of them. Pair your phone again automatically

2009 GMC Envoy | Answered on Apr 27, 2017


Check the pressures to see if there is a blockage in the orifice tube. If freon was only added to an empty system there is most likely air in the system. The blend door may not be changing completely from heat to cool also needs to be checked.

2009 GMC Envoy | Answered on Jul 23, 2016


On GM vehicles starting back in mid 2000's , maybe even before that. They started using inputs to the body control module from the ignition switch, from there the BCM controls all vehicle systems .
Power Mode Description and Operation
Serial Data Power Mode
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle the PMM is the body control module (BCM). The BCM uses 3 signals from the ignition switch. These are the Ignition 0, Ignition 1, and Accessory.
To determine the correct power mode the BCM uses:
?€¢
The state of these signals


?€¢
The sequence of switch closures received by the BCM


?€¢
The status of the engine run flag

The chart indicates the power modes detected and transmitted by the BCM:

Correct Ignition Switch Inputs
Ignition Key Position

Power Mode Parameter

Engine Running

Sampled Ignition Signal State

Accessory

Ignition 1

Ignition 0
OFF
Off-Awake or RAP
No
Inactive
Off
Off
UNLOCK
Unlock or RAP Unlock
No
Inactive
Off
On
ACC
Accessory
No
Active
Off
On
ON
Run
No
Active
On
On
START
Crank
No
Inactive
On
On
ON
Run
Yes
Active
On
On
Fail-safe Operation
Since the operation of the vehicle systems depends on the power mode, there is a fail-safe plan in place should the body control module (BCM) fail to send a power mode message. The fail-safe plan covers modules with discrete ignition signal inputs as well as those modules using exclusively serial data control of power mode.
Serial Data Messages The modules that depend exclusively on serial data messages for power modes stay in the state dictated by the last valid BCM message until they receive the engine status from the powertrain control module (PCM). If the BCM fails, the modules monitor the serial data circuit for the engine run flag serial data. If the engine run flag serial data is true, indicating that the engine is running, the modules fail-safe to Run. In this state the modules and their subsystems can support all operator requirements. If the engine run flag serial data is false, indicating that the engine is not running, the modules fail-safe to OFF-AWAKE. In this state the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.
Discrete Ignition Signals Those modules that have discrete ignition signal inputs also remain in the state dictated by the last valid BCM message received on the serial data circuits. They then check the state of their discrete ignition input to determine the current valid state. If the discrete ignition input is active, B+, the modules will fail-safe to the RUN power mode. If the discrete ignition input is not active, open or 0 voltage, the modules will fail-safe to OFF-AWAKE. In this state the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.
You would need a scan tool that can read data from the BCM . What may be the problem is a lose connector , these pin's at connectors are tiny and doesn't take much for one to become lose.

2009 GMC Envoy | Answered on Jan 16, 2015


The crankshaft sensor can cause instant engine shut down when it fails. Did the dealership check for fault codes?

2009 GMC Envoy | Answered on Apr 20, 2014


Check your control arm bushing. Just had a similar issue with me 1999 Jimmy. Bushing were out.

2009 GMC Envoy | Answered on Jun 03, 2013


My GMC 2004 Envoy when in drive will not shift out of 1st gear. When driving the Transmission doesn't sound like it's slipping. Does anyone know what the problem might be?

2009 GMC Envoy | Answered on Oct 01, 2011


If you are sure that you "have" XM already setup (so that your radio will receive it), then it's as simple as pressing the button once for AM, again for FM, then once again gives you XM. (Or that's how it works in a Buick Lucerne SUPER (2008). Hope it helps! Cheers...

2009 GMC Envoy | Answered on Aug 01, 2011


go get it checked at autozone. what is the car doing. I dont know how to diagnose engine light just went on. those cars are known for engine lights. in higher mileage it is usually o2 sensor.

2009 GMC Envoy | Answered on Jan 06, 2011


Take it to someone with a code reader and see what code is in the computer. Most parts stores can do it. Lee

2009 GMC Envoy | Answered on Jan 06, 2011

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