20 Most Recent 2008 Chevrolet Tahoe Questions & Answers

Bad flapper door actuator, or leaking vacuum line.

2008 Chevrolet... | Answered on Jan 03, 2018

First thing I would do is rig a vacuum cleaner hose that will go deep into the defrost vents... cut the defrost on HIGH - WIDE OPEN - FAN ON HIGH!! -- then stick the hose down and dig around.. you will find you have collected a LOT of farm "dust" (down)(the way dust falls) in the defrost vents.. and the A/C vents are not (down) and nothing falls (down into) the vents...

2008 Chevrolet... | Answered on Oct 18, 2017

Do you know anything about automotive electrical testing ? Do you know what it takes for your vehicle to start ? When you trun the key to start what happens ? The electronic's involved ? The ignition switch is a input to the BCM - body control module . When the key is turned to the start position the BCM see's that an then sends a coded message to the ECM - engine computer.over the serial data bus or network ! which will then energize the starter relay , located in the under hood fuse box . This will only happen if the ECM see's the input from the transmission range sensor , telling the PCM the vehicle is in park or neutral. an there isn't any problem with the anti- theft system . Plus all the other basic problems that can cause a no crank no start condition . Battery , battery connections , battery cables etc... Low Voltage will cause warning lights to come on , telling the driver those systems are disabled . The best thing you could do , have a qualified repair shop hook up a professional scan tool an check for DTC'S .

Circuit Description (Key Start)
When the ignition switch is placed in the Start position, a discrete 12-volt signal is supplied to the body control module (BCM) notifying it that the ignition is in the Start position. The BCM then sends a message to the engine control module (ECM) notifying it that CRANK has been requested. The ECM verifies that the transmission is in Park or Neutral. If it is, the ECM then supplies 12 volts to the control circuit of the STRTR relay. When this occurs, battery positive voltage is supplied through the switch side of the STRTR relay to terminal S of the starter solenoid.

Also if the charging system was not working properly the Computers on the vehicle would shut thing's down if the BCM see's low output from the alternator .
Electrical Power Management
The electrical power management (EPM) is used to monitor and control the charging system and alert the driver of possible problems within the charging system. The EPM system makes the most efficient use of the generator output, improves the battery state of charge (SOC), extends battery life.
The idle boost operation is a means of improving generator performance during a low voltage or low battery SOC condition.
Idle boost is activated in incremental steps, idle boost 1 must be active before idle boost 2 can be active. The criteria used by the body control module (BCM) to regulate EPM are outlined below.

2008 Chevrolet... | Answered on Feb 28, 2017

If you can hear the motor when you try to operate the window then it'll be a problem with your window regulator (the mechanism that moves the window up an down), if you can't hear the motor then It's more likely to be a fault with the motor as you said it wouldn't work with the central locking. This means your car has a total closure system, ie you press a button and all windows and sunroof close. These systems are usually seperate wiring from the switched circuit used to operate the windows from inside the car, so, if the windows don't work on either circuit then the one thing they do have in common is the motor.

2008 Chevrolet... | Answered on Dec 14, 2015

It's not reading the chip,in the key,,,,,get new ignition switch with key,,,

2008 Chevrolet... | Answered on Nov 15, 2015

go to grage and setup

2008 Chevrolet... | Answered on Mar 22, 2015

that question has been asked by thousands of people,, you cant disable it ,,, it part of the cpu of the auto,, only thing you can do is pull the dash and remove the bulb,, but it will still pop up in your message display,,, best think to do is get it in working order

2008 Chevrolet... | Answered on Mar 11, 2015

PO 446 Evap System Vent Solenoid issue

Nothing to do with the canister

Have to test parts & only replace those that fail

Smoke the system & test all the evap components

Scan tool data may help

Google your codes

Type: OBD PO446

2008 Chevrolet... | Answered on Jan 04, 2015

First, check fuses. Do none of the doors turn on lights? could be bad light switch.

2008 Chevrolet... | Answered on Dec 01, 2014

TCM is Inside the PCM

2008 Chevrolet... | Answered on Nov 08, 2014

It will be necessary to remove both front seats before removing the console. The console mounts are located UNDER the seat mounts. 4 bolts hold the seats down and don't forget to unplug the wiring to the seats before removing.

2008 Chevrolet... | Answered on Sep 01, 2014


2008 Chevrolet... | Answered on Aug 06, 2014

The noise could be due to worn out rear struts( shock absorbers). Have the vehicle looked at at sears, or midas, firestone, etc, and ask to have the rear end checked.

2008 Chevrolet... | Answered on Jun 02, 2014

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