2004 GMC Envoy car seems to be dead

Tiny
MIKEY3379
  • MEMBER
  • 2004 GMC ENVOY
  • 155,000 MILES
Key got stuck when I finally got the key out car don't start. I replaced ignition lock and ignition switch still don't start. I have no power to anything, no lights, horn, radio, windows, ect. But the service engine light comes on when key is all the way on. Don't know what is wrong.
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Friday, August 23rd, 2013 AT 8:49 PM

12 Replies

Tiny
TY ANDERSON
  • EXPERT
Replacing these ignition switch and ignition lock will cause a dead battery and no start problems. The small gear on the ignition switch must be in the proper position or alignment with the ignition lock cylinder if it isn't the switch will remain on when you have removed the ignition key an will not rotate the ignition switch to the proper position to tell the engine to start.
Make sure the alignment of the ignition switch gear is correct. If not turn gear with small flat head screw driver until is stops. On the ignition cylinder housing use a screwdriver to rotate the lock cylinder housing gear counter clockwise until it hits a stop then connect the connector to the ignition switch. Install ignition switch into the lock cylinder housing. Use a screwdriver to rotate the lock cylinder housing gear clockwise to start position- allowing it to spring return into the run position. Align the lock cylinder and install the lock cylinder into the lock cylinder housing. Then reinstall else in reverse order of disassembly.
Start here after a charged battery assuming the battery is still good.
Let me know if this answers your question or if you have any more questions.
Talk to you soon, TY
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Friday, August 23rd, 2013 AT 9:24 PM
Tiny
MIKEY3379
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I also wanted to mention the gear shift wont move out of gear it seems to be stuck in park.
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Friday, August 23rd, 2013 AT 9:36 PM
Tiny
TY ANDERSON
  • EXPERT
There is a circuit that goes through the ignition switch that when ignition switch is turned on unlocks the shifter. Assuming ignition switch is installed correctly and being a electric locking device the battery must be in good condition to function properly.
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Friday, August 23rd, 2013 AT 10:03 PM
Tiny
MIKEY3379
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Thanks a lot I will check it out in the morning and make sure everything is installed correctly. I will also make sure the battery is charged. If I need more help I will let you know.
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Friday, August 23rd, 2013 AT 10:15 PM
Tiny
MIKEY3379
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I got the car started finally, but now the transmission stays in 3rd gear when I put it in drive. A/C panel went out and service engine light, security light, abs light all came on. I took off the battery cable and reset the computer. The a/c works now but lights on dash and the transmission are still the same.
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Saturday, August 24th, 2013 AT 9:56 AM
Tiny
TY ANDERSON
  • EXPERT
That's good news, progress has been made. The transmission gear sounds to me like the shifter cable is out of adjustment reflecting a different gear on the instrument cluster when the shifter in drive. The vehicle's computer sends data to the instrument cluster on which position the gear shifter is in and if the cable is out of adjustment it will put the transmission in a different gear than anticipated. Check the shifter cable.
The service engine light and other warning light can not be reset by disconnecting the battery as we could with older vehicles. Some codes will need to be reset by using a scan tool. Most auto part suppliers will do this for free. If the warning lamps stay on please send the fault code retrieved to me and I find where to start diagnosis on why the lights are on.
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Saturday, August 24th, 2013 AT 12:00 PM
Tiny
MIKEY3379
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I got the lights to go off. The transmission is going into the right gears when I manual shift it from first through third but when I put it in drive it stays in 3rd. It goes from park to reverse to neutral to drive just fine. It just stays in 3rd gear when it's in drive. Could the computer be sending the wrong signal.
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Saturday, August 24th, 2013 AT 12:56 PM
Tiny
TY ANDERSON
  • EXPERT
There is a switch on the driver side of the auto transmission that relays which gear the transmission is in to the vehicle's computer the computer then sends the data to the instrument cluster in which gear has been selected. My first impression would be an out of adjustment on the shifter cable to the switch mentioned above.
Try to move the shifter with the shifter button pressed slowly to try and get the instrument cluster to read shifter is in drive. This will show you if your switch is in fact working and that the cable is out of adjustment. If you can see drive selected as you slowly move the shifter then you'll need to adjust the shifter cable at the shifter side or where the cable connects to the transmission side. Good luck
Let me know if this answers your question or if you have any more questions.
Talk to you soon, TY
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Saturday, August 24th, 2013 AT 1:17 PM
Tiny
MIKEY3379
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I checked the shifter cable and it was adjusted correctly. I took it to get the codes checked and these are the codes p0753, p0740, p0758, p0785, p2761. They are all transmission codes. I had no problems at all out of my transmission until the battery went dead when I changed the ignition switch.
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Monday, August 26th, 2013 AT 8:37 AM
Tiny
TY ANDERSON
  • EXPERT
I've found a Technical service bulletin published by the manufacture that mirrors what you've just said. I need some more information from you. First look in the glove box. See if there is a sticker with a bunch of three digit codes (XXX). Specifically I'm looking for codes: m30, m32, m33, mt1, mn8. Next do you have an aftermarket alarm system and/or remote starter?
Try having all the codes you just gave me reset by the same place you got them from. These codes could just be from the dead battery your vehicle had. Reset and see if the codes return.
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Monday, August 26th, 2013 AT 1:23 PM
Tiny
MIKEY3379
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I have code m30. No remote start or aftermarket alarm. Just the factory alarm.
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Monday, August 26th, 2013 AT 5:53 PM
Tiny
TY ANDERSON
  • EXPERT
Ok, good. It sounds to me all these codes are a result of the dead battery slowly depleting due to the ignition switch issue. The TSB (technical service bulletin) refers to all of the codes you listed as "loss of voltage to the transmission solenoid power circuit". Which means the dead battery or now a circuit problem. My bet is the dead battery. Have all the codes reset and see if any codes return. Then we know there is still an issue. Hope this helps, talk to you soon. TY
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Monday, August 26th, 2013 AT 10:33 PM

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