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2004 gmc envoy_sle
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Discussion Starter #1
Went to park the envoy the other day, could not pull the key from the ignition. It goes into park, but the ignition will not come back to the lock position. I have removed the steering column covers and if I push in the plunger on the theft deterent lock, I can remove the key. I replaced the ign.& start switch( has the gear teeth) this did not help.
 

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2003 gmc envoy_sle
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my bro had same problem with his Envoy. It was his battery believe it or not. DO NOT ask me how it was related, but as soon as he replaced the batt, he never had this issue again.
 

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2003 gmc envoy_slt_xl
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325 Posts
You all have the right idea. It is the ignition interlock system, which is electric. What you have to figure out is, why is the interlock not communicating electrically with the ignition switch. Could be several reasons. Have you checked under the center console, near the shifter there is a bracket with four small wires which can break because of the way they bend under there? One of those controls the key removal. If you do a search, there are many pictures, threads on how to check this.
 

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2003 gmc envoy_slt_xl
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Ignition Key Removal

2003 Envoy XL, 4WD, Rear A/C and Radio Condtrols
After reading a few threads on the forum, I dis-assembled the center console (you don't need to completely remove the console; remove screws (see below) and slide it back from its position) [pull emergency brake as far as possible and put shifter in last position to rear; remove head of shifter (side screw), pull the console back and tilt the front of the console up. You don't have to disconnect the A/C and radio controls]

Screw locations:
(1) Under rubber insert of forward cup holder
(2) located at front of console box storage area.
(2) located under rubber insert at back of storage box
(2) Located under rubber floor insert of storage box
(2) located under storage box, attached console to trans hump

I found two wires on the lock-out switch/solenoid connection on the aft of the shift mechasism were broken. Called a GMC dealer and they provided the GMC and Delco part numbers. The Delco p/n for my 2003 Envoy XL lockout solenoid connector is PT3923. $22.10 at local auto parts retailer.

The replacement connector comes with a six wire pigtail and splice connectors. The color position as follows (looking from the wire side of the connector) Top Left: Black, Top center: Green/white stripe, Top Left: Yellow. Bottom left: Pink, Bottom Center: Green/white stripe. Bottom Right unused.
Spliced in the new connector and key came out of ignition!
 

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2002 chevy trailblazer_ls
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37 Posts
It happened to me once and tried to follow tpward1500 step and it worked. Its just pain in the ass to remove and to locate the problem it took me 1/2 day to get it fixed.
 
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