20 Most Recent 2009 Chevrolet Impala Questions & Answers

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2009 Chevrolet... | Answered on Oct 08, 2018

with unplugged try cleaning with brush and cleaner

2009 Chevrolet... | Answered on Sep 01, 2018

First off you need to read how this works . BCM - body control module is in fail- safe mode more then likely . The ingition switch is a input to the BCM . The BCM turns on relays to turn vehicle systems on . If something happens the system will fail safe to last commands by the BCM .
The body control system consists of the body control module (BCM), communications, and various input and outputs. Some inputs, outputs and messages require other modules to interact with the BCM. The BCM also has discrete input and output terminals to control the vehicle's body functions. Battery positive voltage is provided to the BCM from the BCM fuse in the underhood fuse block. The module has two grounds at G 202 as well as one directly to the vehicle battery. The BCM is wired to the GMLAN High speed serial data buss and the GMLAN Low speed serial data buss and acts as a gateway between them. If the BCM does not communicate the vehicle will not start due to the inability of the engine/powertrain control module (ECM/PCM) and vehicle theft deterrent (VTD) control module to communicate without the BCM providing the gateway function.
Power Mode Master
This vehicle body control module (BCM) functions as the power mode master (PMM). The ignition switch is a low current switch with multiple discrete ignition switch signals to the PMM for determination the power mode that will be sent over the serial data circuits to the other modules that need this information, and so the PMM will activate relays and other direct outputs of the PMM as needed. Refer to Power Mode Description and Operation for a complete description of power mode functions.

Relay Controlled Power Mode
The body control module (BCM) uses the discrete ignition switch inputs Off/Run/Crank Voltage, Accessory Voltage, and Ignition 1 Voltage, to distinguish the correct power mode. The BCM, after determining the desired power mode, will activate the appropriate relays for that power mode.
The RAP relay remains on for a timed period after the Ignition key is removed. Refer to Retained Accessory Power Description and Operation for more information on the retained accessory power (RAP) function.

You mite want to thing about taking your vehicle to a qualified repair shop. Hooking up a professional or factory scanner to view input data to the BCM ,plus checking for DTC'S - diagnostic trouble codes in the BCM , autozone , advance part stores can not read codes in the BCM .

2009 Chevrolet... | Answered on Feb 20, 2018

vent door actuator is bad. not sure how much to fix but not that bad of a job. look it up on youtube. pretty simple fix.

2009 Chevrolet... | Answered on Feb 06, 2018

Your not going to be able to diagnose the SRS (Air Bag)
System, without factory trouble charts to follow,way too
many codes & procedures to follow.

A battery is about $110.00 & the cables are only3 years
old,so they should be able to be cleaned

I would only guess, that they didn't do anything about
your intitial complaint on the Service Airbag light,not
for $100.00

2009 Chevrolet... | Answered on Dec 21, 2017

gas cap code p0449 ??? This is not a gas cap code ! DTC P0449: Evaporative Emission (EVAP) Vent Solenoid Control Circuit.. your best bet , take it to a qualified chevy repair shop .

Wells EVAP Training with Sgt Tech P0440 P0441 P0442 etc

2009 Chevrolet... | Answered on Apr 12, 2017

First of all, Alysa, that's not nearly enough information. The most common causes of engine overheating are: leaking hoses, radiator leaks, heater core leaks, a failed water pump, thermostat leak, freeze plugs leak, automatic transmission oil cooler leak and (I hope not for your sake) a cracked block or cylinder heads. Make sure you have the radiator filled with the proper amount and ratio of water and anti-freeze. Simply dumping more anti-freeze in there won't help. Check for leaks and check the thermostat before doing anything. Hope this helps. . .

2009 Chevrolet... | Answered on Mar 10, 2017

try replacing it wearing gloves. oils on your skin transfer to bulb and ruin bulbs.

2009 Chevrolet... | Answered on Feb 22, 2017

stop touching the bulb with your bare fingers need to wear latex gloves when installing. put some dielectric grease on the connector, be sure you dont get any on the bulb

2009 Chevrolet... | Answered on Feb 21, 2017

When working is light as bright as the driver side low beam ? Dim ? What's the headlight socket look like ? Burnt ? high resistance ,drawing to much current . Do you know how to do current draw testing ., Voltage drop testing ? Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia

2009 Chevrolet... | Answered on Feb 21, 2017

I would certainly check the wheel hubs, the main bearings are in them. Also, struts or shocks could be bad or you maybe needing a front end alignment.

2009 Chevrolet... | Answered on Dec 11, 2016

The starter is computer controlled by way of a relay ! When you turn the key to the start position a low voltage signal is send to the BCM - body control module , the BCM then sends a message over the GMLAN serial data network to the PCM for starter engagement , The PCM energizes the starter relay sending B+ voltage to the starter solenoid ,if there are no anti-theft system problems. The codes you have listed are emission related codes !
DTC P0455: Evaporative Emission (EVAP) System Large Leak
You must mean P0442 , because there isn't a code P0422 .
DTC P0442: Evaporative Emissions (EVAP) System Small Leak Detected
None of these would cause vehicle to shut down > Your best bet would be to take your vehicle to qualified repair shop an have diagnostics run on it .

2009 Chevrolet... | Answered on Sep 23, 2016

Is the bulb good ? Is there voltage at the light fixture , ground on the other side ! Check out voltage drop testing video on youtube ! Watch basic automotive electrical testing videos . How to use a DVOM - digital volt ohm meter . You mite want to buy a repair manual , show how to take parts of your vehicle apart to get at wiring etc.... http://www.autoshop101.com/ also go here to learn automotive electrical

2009 Chevrolet... | Answered on Sep 23, 2016

It seems to me you should check your fuses, they burn all the time. There inside your car most of the times under or near the steering wheel somewhere in that erea

2009 Chevrolet... | Answered on Sep 23, 2016

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