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2003 gmc envoy_slt_xl
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24 Posts
HELP!!!!!!!!!!!!! i just replaced the starter switch and starter relay and i still have the same problem :hissy::hissy::hissy::hissy::hissy: how do i jump the starter to see if that is the problem and where is it located:bonk::bonk::bonk:
 

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2004 gmc envoy_sle
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51 Posts
Okay, I replaced my ignition switch yesterday. I was nervous, I had read numerous posts about this, but some of them conflicted, and I wasn’t sure what I was getting myself into. I haven’t done a whole lot of work on newer car systems, although I did replace the stepper motors on my Envoy a while ago. The switch replacement was unbelievably simple, and anyone can do it.

Anyway, I decided to make this post, hopefully it’ll help someone who needs to do this in the future.

(FYI, I have a 2004 Envoy XUV, with foot pedal adjustment and tilt wheel controls on the steering column, and had no problem at all.)

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.

(Moderators, feel free to relocate this post if necessary.)
Hi guy just used your instution to change mine on the 2004 envoy that I have
now did yours have a battery light showing on after you replaced it???

richardr
 

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2003 gmc envoy_slt
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21 Posts
Mellis--Great write up

:thx. I appreciated the write up on replacing the ignition switch. I have been lurking here to try and get a handle on the problems I've experienced lately with the 03 Envoy. Throwing codes, stalling, and cruise control not working randomly.

Went to dealer first with codes. They replaced the crank shaft position sensor ($340), and wrote on the invoice "other issues may still exist". That's when I started looking myself at the possible "issues". By the way, the problem returned in about 200 miles.

I cleaned the TB, which seemed to help, but within 100 miles the cruise control would trip off at speed, and the rig was dying as well at slow speed.

I bought a new ignition switch and installed yesterday. Thanks to this write-up and pics, the install went well. Have driven so far about 50 miles and all seems OK so far.

I would add to the write up the following: Remove the two screws that hold the knee panel in place. It's not necessary to remove it, but removing the screws helps taking the lower steering column cover off (more clearance).

Secondly, and very important, don't disturb the position of the gear as you remove the switch. It's a challenge because the wire connector comes off kinda hard and the chance to move the gear occurs here. When its out, mark a couple of the teeth on the tops with a black sharpie and at the cooresponding place on the housing so if it does move you can put it back where it belongs. The new switch comes with the gear in the wrong position, at least mine did, so it's necessary to move it and without a reference on the old one its a guess. Mine went in the the right position the first time and started up without issues.
 

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2004 gmc envoy_sle
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51 Posts
Yes donot mass withe old teeth match them up and they will go rite in dont turn a 15 min job into a 60 min
 

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2002 gmc
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4 Posts
Ignition Switch Problem

My problem started off as a motor noise running while the key was removed from my 2002 GMC Envoy. It turned into a no start issue while I tried to remove the ignition switch.

After speaking to a guy at autozone he suggested that I try out an ignition switch since I was getting an ABS light along with the ABS motor running with the car off. We figured it was a cheap try before I drove it to the shop.

So I pulled the ABS fuse to stop the ABS motor and went about removing the ignition switch. I also disconnected the battery.

I pulled the ignition switch out of the cylinder but I could not get the wire connector off the ignition switch easily so I decided to call it a day and try tomorrow. I did screw up and moved the teeth on the ignition switch, but I didn't think this mattered since I was going to put the new one in tomorrow.

Since I gave up for the day, I decided to push the old ignition switch back in place. I did connect the battery.

I tried readjusting the ignition teeth on my old ignition switch (4 settings) and I get door chimes, interior lights, but the key gets stuck, no dash lights, no radio power, and I can't shift out of gear and of course the Envoy won't start. :worried:

I'll put up another post after I put in the new ignition switch, any thoughts in the meantime?:p
 

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2005 chevy trailblazer_ls
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1 Posts
Ignition switch teeth alignment

I recently replaced the ignition switch on my 05 TB to correct the ABS/brake light / blower fan issue. After initially misaligning the teeth on the switch leaving me in the ACC position when I pulled the key out, I think I now have the alignment correct since all 4 key positions are available.

Now I have a new problem, however. The engine is surging when operating at low speeds.

Could this be caused by the teeth being slightly misaligned still?

If so, can anyone describe the proper way to align the teeth (other than line up with the old switch)?
 

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2002 gmc
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4 Posts
New Ignition Switch

I was able to put the new ignition swithc on, had to fiddle with the adjustment, but the vehicle fires up, but still the ABS motor runs with the key out. I'll look on another thread on that issue.
 

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2003 gmc envoy_sle_xl
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1 Posts
i really need help! lock cylinder is stuck in the on position. installed a new switch and lock cylinder and its still stuck in the on position. dont know what to do now.
 

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2006 chevy
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298 Posts
Thanks for the great write up. I had the P1682 code show up, so I reset it, and went to the store. Got out of the store and my vehicle started, ran rough, dash lit up like an xmas tree, and dash went dim. I tried to start and nothing, the radio stayed on constantly. After checking the site and running to the local dealership, I replaced the switch and all is good :yes:
 

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2005 buick rainier
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1,012 Posts
Pics of initial gear position

I just changed my ignition switch (just preventative) and took some pics of the initial gear position which should help some people. The pics show the position of the gear with the ignition off and the key out (i.e. as you would be installing it). For reference, there is a gap in the gears about the width of a missing tooth. The gap has been circled in red in the pics (it's technically just below flush with the top of the switch).





 

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2004 gmc
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I just changed my ignition switch (just preventative) ...
A most excellent and clever tactic! :hail: :thumbsup: Don't let it fail on a dark and stormy night with no cell phone coverage in a neighborhood that reminds you of the Mos Eisley Spaceport Red Light District. :eek: :ugh: :sadcry:
 

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2005 buick rainier
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1,012 Posts
A most excellent and clever tactic! :hail: :thumbsup: Don't let it fail on a dark and stormy night with no cell phone coverage in a neighborhood that reminds you of the Mos Eisley Spaceport Red Light District. :eek: :ugh: :sadcry:
That's what I was thinking too ;) I hit 70k and figured I was in the range where it could start happening. (well, it wasn't completely preventative...I had this problem)

On a side note, I ordered an OEM AC Delco from Amazon.com and, while physically shaped the same, looked different (it had a gray back) and had a different part #...I wonder if they redesigned it to last longer.
 

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2005 gmc envoy_slt_xl
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114 Posts
I have the iPad in the Envoy now and just completed it. One way to match the gears up is to take a red sharpie and mark the teeth at the top and bottom that are exposed then count back to the stop. Then take your new one and count back.

What I don't understand is how does this $34 part cause so many issues and how is it Auto Zone gives me a lifetime warranty but GM only last 84K miles??
 

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2003 chevy trailblazer_ltz
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9 Posts
Replaced the switch, still same issues

Ok, so heres my situation. I was having the "abs", "(!)(P)", "service 4wd" and the airbag light all comeing on and displaying unknown driver across the DIC and then back to driver 1. Took it to the shop and they said it was the ignition switch. I replaced it, just like in the photos. I still have the same problems. The gears are lined up right as well. The weird thing is that everything else in the vehicle works like it's supposed to. Stereo, a/c, vent's, seats etc. I am only having issues with the above mentioned problems. What the heck is going on????
 

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2005 chevy trailblazer_lt
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37 Posts
I change my ignition switch a month ago and now star the same problem but I hit the starter with a pice of wood and it cranks normally with no issue but at night when it rest in the morning won't star is a f nightmare this f cars
 

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2005 buick rainier
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I change my ignition switch a month ago and now star the same problem but I hit the starter with a pice of wood and it cranks normally with no issue but at night when it rest in the morning won't star is a f nightmare this f cars
Sounds like the solenoid on the starter (I'm assuming these starters have the usual attached solenoid).
 

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2005 chevy trailblazer_lt
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37 Posts
Sounds like the solenoid on the starter (I'm assuming these starters have the usual attached solenoid).
Let me tell u is a nightmare I. Couldn't sleep yesterday thinking if it will star or not but it actually did with no problems so I do no what could it be the problem !!!it has 145k and all I do is adding 32 miles everyday going and caming from work
 

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2005 buick rainier
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Let me tell u is a nightmare I. Couldn't sleep yesterday thinking if it will star or not but it actually did with no problems so I do no what could it be the problem !!!it has 145k and all I do is adding 32 miles everyday going and caming from work
Have you replaced the starter/solenoid? If it only works when you physically hit it with a block of wood, that's what I'd change first ;)
 

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2005 chevy trailblazer_lt
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Have you replaced the starter/solenoid? If it only works when you physically hit it with a block of wood, that's what I'd change first ;)
The las time I hit it with a pice of wood and now I just hit the cable so I tho it was the relay I change my envoys relay to my trailblazer and nothing so I changed the ignition switch and nothing and when I hit it with the wood on the starter it finnaly works so that's was like a month ago and now just star the same **** all over
 

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2002 gmc envoy_slt
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Thanks to this thread I replaced mine this morning. Envoy shut off about 30' after leaving the driveway in the middle of the road. Popped the shifter solenoid out to get it in neutral and push it back. New switch from Autozone, 3 or 4 adjustments and good to go. Took longer to put the console and panels back in it.

:thumbsup:
 
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