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:
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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.
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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
Does the charge indicator illuminate?
Go to Step 3
Go to Symptoms - Engine Electrical
3
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
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6
Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 3
Jeff , was checked with battery tester alternator is right where it should be 14.2 volts! The battery light is dim when off , like it's getting a bleed of voltage. I'm not sure if this model has the diode in the voltage
regulator that keeps this from happening! I don't want to change it , if it's not the problem. But if you can find out some more about it, I appreciate it
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SOURCE: 2004 GMC Envoy has trouble idling
Try the fuel filter. Sounds like the engine might be running rough due to weak fuel pressure. Its cheaper to replace, especially if it's still original from 04. Try running some injector cleaner through a couple of tanks of high octane gas.
SOURCE: 2004 Envoy AC works but does not come out the front vents. Only @ windshield
You most likely have a bad mode actuator. http://forums.trailvoy.com/showthread.php?t=40235
SOURCE: battery removal on a 2004 GMC Envoy
The battery is on the right side behind the fuse box. You need a metric set to undo the 3 screws. Theres one that attaches to the body, one to the bar that goes along the top, and theres one on the left side below the vacuum hose and air induction. After you've taken out those three, you should lift the whole thing out(battery and shroud) together. It's hard to take the shroud off before you lift the battery out. After that, you have to pry the shoud off the battery. The two terminals in the back make it hard. Then just go to any auto parts store and they'll give you a new one.
SOURCE: air flowing thru front vents
I just changed my battery as well in my 04 Envoy XUV and the air on the passenger side would not blow. The air has since returned after I restarted but the flow on the bottom has been out for some time even before the battery change.
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just to let you know if this ever happens again another thing to check is the plug to your alternator . I had that problem on my truck it was charging but the light stayed on. the problem was one of the 3 wires was broke on that ALTERNATER plug.
SAFE DRIVEING TO YOU......
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