Question about 2004 GMC Envoy

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ALTERNATOR??? WHEN I START MY ENVOY XUV, MY VOLTAGE STAYS LOW FOR 2-4 SECOND AND THEN BOUNCES TO NORMAL...IS THIS A INDICATION THAT MY ALT. IS GOING OUT. I JUST INSTALLED A NEW BATTERY 2 MONTHS AGO. THANK YOU, SHELLEY

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No i dont think your alternator is going out but you can test it easily there at home simply by taking the pos battery cable loose while the vehicle is running...if it continues to run it means he alt is good if it dies then you wil need a new alternator.its a sure fire way to know if its good or bad.

Posted on Jan 20, 2009

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How to fix my rear tailgate window


check the fuse/relay. if it is neither of these check the switch with a multimeter. If you can hear the motor trying to move the glass when you try the switch it may be the regulator needs attention. It may be the motor needs to be replaced.

check fuse and relay along with the switch first then the regulator and motor afterwards. Replacing the small electronics is obviously easier than having to open up the tailgate to check the mechanics of the winedow.

Sep 13, 2015 | 2004 GMC Envoy XUV

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2004 gmc envoy xuv , battery light stays on , replaced battery and checked alternator charging fine


You checked the charging voltage at the battery with a ? volt meter ? What was the voltage with the vehicle running ? 13.1 to 14.1 volts ?
BATTERY NOT CHARGING The IPC illuminates the battery not charging indicator in the driver information center when the following occurs:
?€¢
The PCM detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the PCM requesting illumination.


?€¢
The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the body control module (BCM) indicating the system voltage


Charge Indicator Always On
Step
Action
Yes
No

1

Did you perform the Diagnostic System Check for Starting and Charging? yes or no
Go to Step 2 yes
Go to Diagnostic System Check - Engine Electrical no

2

  1. Turn ON the ignition, with the engine OFF.
  2. Observe the Charge indicator on the instrument cluster (IPC)
Does the charge indicator illuminate?
Go to Step 3
Go to Symptoms - Engine Electrical

3

  1. Turn OFF the ignition.
  2. Disconnect the generator connector.
  3. Turn ON the ignition, with the engine OFF.
Does the charge indicator illuminate?
Go to Step 4
Go to Charging System Test

4

Test the charge indicator control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 6
Go to Step 5

5

Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls 4.2L.
Did you compete the replacement?
Go to Step 6
--

6

Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 3

Aug 25, 2015 | GMC Cars & Trucks

1 Answer

I have a 2010 implala the battery and alternater is checking out to be good but the battery go low sometimes


You mean the voltage drops while driving? If an acessory is turning on it will cause that to happen, if it returns to normal that's okay. If it stays low, it's an indicator that the alternator is starting to go out.

May 10, 2014 | 2010 Chevrolet Impala

1 Answer

2004 envoy xuv low beams went out all other lights work checked fuses and switched relays 45 and 46 and still not working any ideas?


Try to see if the bulbs blew out by replacing the bulbs first. If they still won't light, it could be bad grounds or connections or bad continuity in the wiring to the headlight relays or switch. Good luck on this repair.

Dec 11, 2011 | 2004 GMC Envoy

1 Answer

2004 envoy xuv low beams dont work switched fuses 45 and 46 still nothing any ideas


Other possibilities are; the bulbs themselves, burnt or corroded bulb sockets, or a bad headlight selector switch.

Dec 11, 2011 | 2004 GMC Envoy

1 Answer

2002 envoy code co550


you need to replace the tccm and get it programmed.


2-04-21-006E: Inoperative 4WD/AWD Lamps, Inoperative 4WD/AWD System, DTC C0550 Set No Communication with TCCM (Reprogram Transfer Case Control Module) - (Jul 20, 2006)
999999995.gif Subject: Inoperative 4WD/AWD Lamps, Inoperative 4WD/AWD System, DTC C0550 Set, No Communication with TCCM (Reprogram Transfer Case Control Module) Models: 2004 Buick Rainier 2002-2004 Chevrolet TrailBlazer, TrailBlazer EXT 2003-2004 Chevrolet Avalanche, Silverado, Suburban, Tahoe 2002-2004 GMC Envoy, Envoy XL 2003-2004 GMC Sierra, Yukon, Yukon XL 2004 GMC Envoy XUV 2002-2004 Oldsmobile Bravada with Electronic Shift or Active Transfer Case (RPOs NP1, NP4 or NP8)

This bulletin is being revised to add Subject information and change the labor operation. This bulletin cancels and supersedes Bulletin Number 03-04-21-006. Please discard Corporate Bulletin Numbers 02-04-21-006D and 03-04-21-006 (Section 04 -- Driveline/Axle).
ConditionSome customers may comment that the 4WD/AWD indicator lights on the selector switch do not work, or the 4WD/AWD system may be inoperative and/or the service 4WD light is illuminated. The condition is typically intermittent and always occurs at key-up. Upon investigation, the technician may find DTC C0550 set.
CauseThe Transfer Case Control Module (TCCM) has not received the wake-up call during key-up and has remained in the "sleep mode".
When the TCCM is in the "sleep mode", it will not communicate with the class II bus or the Tech 2®.
Correction
  1. Try to communicate with the TCCM. If no communication, go to step 2. If communication is possible, go to step 5.
  2. Remove the underhood (ATCM or TREC) TCCM fuse.
  3. Wait 30 seconds.
  4. Reinstall the fuse. The module should "wake up" and communicate with the Tech 2®.
  5. Check for codes in the TCCM. If a C0550 is found current or in history with or without other codes, replace the module and go to step 6.
  6. Reprogram the TCCM with the latest TIS software using normal SPS procedures.
  7. Verify operation and that no codes are present.
Important: For the 2002 model year, the TCCM must be replaced and reprogrammed.
Warranty Information

Jul 29, 2011 | 2002 GMC Envoy

1 Answer

The "ALT" light came on the dash. What does it mean. It came on for only 2 seconds and then went out.


alt is short for Alternator or the charging system was not working properly for 2 seconds.
It should go on when the ignition is on and the car has not been started, yet, to test the lamp.

It's possible the belt was slipping, or the voltage regulator was intermittently not charging, or the alternator is going bad.

However, if it doesn't stay lit while the car is running and you do not experience any starting or driveability issues, don't worry about it just yet. It could be just a glitch that won't come back for a long time.

Good luck on driving your vehicle.

Oct 12, 2010 | 2005 Mazda 6

3 Answers

2004 Envoy xuv 6 cyl stalls with A/C on at idle


2004 Envoy xuv 6 cyl when I turn on the A/C the truck stalls but as long as I keep my foot on the gas it will continue to run

Jun 11, 2010 | 2004 GMC Envoy

2 Answers

I have a 96 ford explorer I just replaced the battery and the alternator in it. When starrted the battery lite stays on and the alternator does not charge it. Is there a linkable fuse or something I am...


Trace all of the wires that are attached to the alternator. If there is a fusible link or a broken wire you will find it. If the alternator is charging but something else is wrong the alternator will pull a steel wrench toward it. You did not mention the voltage regulator. You will find it when tracing your wires. Look it over carefully. Voltage regulators fail keeping the alternator from working. Parts stores have regulators and they are easy to install.

Mar 21, 2010 | 1996 Ford Explorer

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