Its easy. I have an extra ignition switch if you need onebuddys truck wont start is there a how to on changing out the ignition switch
Where is the Engine Wiring Harness Junction Box? I have had the same problem 3 times. I replaced the ignition switch and it failed to start again. Any info you can give me on the part the dealer replaced would help.Mine did the same thing this past Wednesday. Pulled it in the garage the evening prior - got in it the next morning and it wouldn't start - checked the battery output and all was good. It didn't make a sound when turning the key to engage the starter - everything else seemed normal. Had it towed into the dealer - still under factory 3/36. They found it to be the Engine Wiring Harness Junction Box - they called it the ignition relay, but they told me they usually just replace the whole junction box if something shorts out or is problematic. I have attached a scan of the warranty work -
Initially I thought it was the ignition switch.
2004 GMC Envoy SLT XUV
Majestic Red Metallic 5.3L V8 4X4
Join Date: Aug 2008
Location: Parker, PA
First, you’ll only need two thin regular screwdrivers and the replacement switch to do the job.
Disconnect your negative battery cable. I’ve heard that you should disable the airbag, but I’ve read that others did not do this, and neither did I. Just to be safe, I tried to stay away from the front of the wheel while working on the switch.
Take one of your screwdrivers and gently pry the covers of the steering column off. They should separate pretty easily, then you just need to remove the bottom cover to get access to the switch.
Once the cover is off, you’ll see the bottom of the switch where the harness plugs in, the rest of the switch is slid up into a metal sleeve.
Take your two screwdrivers and insert them into the two holes in the metal sleeve. This pushes back the spring tabs on the ignition switch, allowing you to pull the switch assembly down and out of the metal sleeve. The pictures below have two red arrows showing where the two screwdrivers need to be inserted. The yellow circle shows where the harness connects to the switch. The last picture shows the switch removed from the sleeve, but not disconnected from the harness.
Disconnect the switch from the harness.
Look at the teeth of the old switch and compare them to the new switch. Align the new switch gear with the old switch gear. There is a gap in the gears you should see that greatly helps with the alignment.
Plug the harness into the new switch.
Insert the new switch into the metal sleeve until you hear the spring tabs engage the holes in the sleeve.
Reconnect your column cover.
Reconnect your negative battery terminal.
Start her up.
Hope this helps. Took me about 15-20 minutes to do, and most of that time was spent getting the stupid harness off the old switch.
Here's are my notes on how to align the teeth:Kanukong said:Trailvoy
2003 GMC Envoy SLE
Summit White 4.2L I6 4X4
Join Date: Nov 2008
Location: Kailua, Hawaii
You just grab a firm hold and pull hard straight out which would be towards the driver door. It is a little hard. I read this post somewhere to pull hard. I initially tried pulling and when it didn't come off I didn't want to force it and break something so I just went back to trying to work the bottom steering wheel housing cover off and when I popped the bottom cover off it just happended to pull the tilt lever off also. So now that I have done it it does just pull out with some force just pull straight out towards the drive door, not out towards the driver seat, don't worry, as long as you are pulling out towards the driver door you can use force. It pulls out and then you can see it is just a plastic piece that fits in the slot just push it back in to get it in and it snaps in.
Please see pics - I think this is what they replaced - at least it looks new, and my quick search on the interweb points to this being the part. If someone knows for sure please chime in - I know this thread was originally started for the ignition switch how to, so sorry to sidetrack.Where is the Engine Wiring Harness Junction Box? I have had the same problem 3 times. I replaced the ignition switch and it failed to start again. Any info you can give me on the part the dealer replaced would help.
Can you post it here, cos im having the same trouble with mine.I'm the one having the issue with my truck not starting. I just replaced my battery today with a Red Top Optima and was able to find the write up on the "how to replace the ignition switch" well both are in and still no start!
are you guys just seeing the truck not turning over or also losing power which is what im having issues with. i was running my stereo system for maybe 10-15mins and the truck would start. is the battery that weak in this truck ?