Ignition Fix EASY GMC Sierra or Chevy Silverado

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For the GMC Sierra or Chevrolet Silverado truck, there are some screws in the bottom of the steering column cover which need to be removed first. I did not demonstrate this in the video since I figured it was self explanatory. If you have noticed the "Security Light" coming on the dashboard message display, then this is most likely your ignition problem. The truck will sound like it is starting normal, but immediately shuts down. It sounds like to me that it does get spark plug ignition, but then cuts power. I am not sure it does or not, but that is what it sounds like for lack of a better description. Listen to the video to hear what my GMC Sierra 2500 (Chevy Silverado) sounded like. It took me 5 years to find out what the problem with my ignition was, since it was interment and hard to troubleshoot and fix that way. There was no engine codes being recorded in the computer since the truck thought it was doing the right thing by shutting down when the security feature was being activated. This feature was designed to prevent theft when a car or truck is hotwired. The vehicle needs the key to start, otherwise it thinks someone is trying to bypass normal key ignition. There are a few systems that must communicate perfect to allow for normal start. This video shows just one simple wire that may be causing an interruption in voltage, causing the security system to prevent the car from starting. You may have a different problem interrupting your car's computer security check.

How to fix the ignition:
A sensor tells the security system whether the key is in the ignition or not. This is a common feature in the GMC, Pontiac, Oldsmobile, Saturn, Chevrolet and other past and present GM brand vehicles. The wire, which is connected to that sensor, comes loose or corroded and needs to be secured or cleaned. Some people have chosen to go further in the ignition unit and actually solder the connector wires in place, but this requires a lot more disassembly and time and probably unnecessary. Wedging a shim may seem primitive, but just hot gluing the plug may not guarantee you the best electrical connection. You can also go ahead and pay an auto mechanic to fix the ignition if you like unnecessarily spending hundreds of dollars. Remove the wire plug connector and visually inspect the connections and clean with electrical parts cleaner which can be found at most auto parts stores. Replace the plug as shown on the GMC Sierra truck in the video. Wedge a shim in the connection and secure the new connection with hot glue, silicon or any other glue that can be fairly easy to scrap off and remove if further maintenance is required. Replace the steering column cover and that's how you fix the ignition in your GMC Sierra or Chevy Silverado 1500, 2500 and 3500.
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If you left a thumbs down on this GMC/Chevrolet ignition fix, please let us know why so we can either make our videos better for you or help you find a solution. If you were not able to fix the ignition problem in your Chevy, GMC Buick or Oldsmobile, using this method, let us know so we can share your experiences with others. We may be able to do a video on another solution that may have solved the starting problems in different models. I have heard a lot of people having problems when an aftermarket remote starter has been installed. This should be addressed by the installer or have them remove the system. The security and passlock sensor problem is so common, it's surprising GMC has not issued a recall. Thanks for watching and happy security light turnoff to you.

HowAuto_truck_car_fix_repair
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After countless attempts at diagnosing this common problem, I realized this would be my cheapest alternative and was actually worth a shot. Turns out that this actually WAS the problem after many misdiagnoses. I saved hundreds of dollars by trying this as opposed to trying to take it to a shop. This worked beyond all other methods I tried and worked instantly. I appreciate this video and for the help on such a random and aggravating problem. Truck started right up with no security code. The dash got a bit damaged while doing this, however it was very minimal. I was even able to fit the shim in without removing the cover totally. Very helpful video. Glad I found this before trying anything else that would have ran me a fortune. 

GnartotheBone
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8 years later and your straight forward, clear and concise video is still helping people. THANK YOU for taking the time to post the knowledge. 2000 Chevy Silverado 2500 6.0 Vortec with 216k + miles and been haunted by this baffling intermittent issue for nearly half of those miles. After all the aggravation I doubted that I had found the solution (and such a simple one at that), but after applying the suggested fix and turning the key it took about half a crank and under 1 second for the engine to fire and make me a believer. I can't thank you enough. May God Bless you.

jobygrafton
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I want to thank you from the bottom of my heart for this great video, after watching a bunch of others this video seemed most in line with what was happening on my 2002 Chevy Suburban 1500 5.3L. I had read a bunch of posts from people with a similar problem, and some had spent $1, 000.00 and more trying to fix different things - Fuel pump, crank position sensor, fuel pump relay, ignition system, etc. and some of their trucks sit in a garage to this day unfixed! Your VAT wire connector servicing brought my truck back to life ! I can't thank you enough !

paulcaruthers
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Additional issue this solution fixes - for months the clock on my 2005 Silverado would reset to 12:00 at every startup. I have not had the issue described here with truck not starting. I checked alternator, battery, and anything else I could possibly suspect. Came across this video and tried the simple shim solution as described and boom....clock now holds just fine!!! Thank you again for posting this video.

tompivnichny
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I send 3 days of searching you tube untill i found this video and it worked exactly as he presented it and it started and the 2nd try I cannot believe how simple it was from all the other fixit videos.. you saved me a ton of money, thanks so much

frankgwinn
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I had the exact problem with my 03 Blazer. I took the idea a step further by removing the 3 wires from the connector and very carefully pinched them with needle nose pliers. This made a very snug and positive contact on the pins when I reinstalled the connector into the sensor. The truck started immediately and stayed running without an issue. Thank you for the great info in the video.

rmike
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My GMC Sierra was doing this same thing this morning, did research on the Internet, found this vid and it totally helped, thanks man. My truck started right up.

krwshitt
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You are amazing! My truck did the same exact thing the other day and has been stranded in a walmart parking lot for the past 3 days. Me and my dad tried everything and were about to give up and tow it to a dealership to run expensive diagnostic tests on it, but after hours among hours of research i stumbled across this video and decided to give it a try. And it worked!! You guys are live savers!!! I have a 2004 gmc sierra 2500hd 6.6L LB7 Duramax btw it worked on this also!

koorite.
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So I bout a silverado that had this issue, mechanic said it was the neutral control safety switch so I replace that and ended up blowing a fuse and stumbled onto this video and the plug was the issue all along thank you so much

Baked
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It worked for me on my father's truck too. Thanks for the video. Sad thing is the garage my father usually takes the truck to replaced a bunch of parts before I realized he hadn't found the problem. Did some research, and found this video. Problem is now fixed.

praymetimmyd
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Thanks a lot! It solved my problem! Actually this is the second time it has done this. The first time I had it towed in. They mechanic said it started every time he tried it. I finally just brought it back home. But I did find your video then and went ahead and wedged a toothpick in there. It has been running for the last year or so, no problem. then this morning it did the turn over and die thing. Tried it several times and it wouldn't start. I needed to leave for work so I got in a different vehicle. When I got home this afternoon, it started, no problem. But the automatic reset of the security system (after so much time) explains that. It also explains why it always started for the mechanic. Now I need to find a way to quickly reset the security system. Maybe unplug and clean the connections too.

robertparnell
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This helped my husband fix his 99 chevey silverado . Save $$$ watching this video . Thank you!!

monibling
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Thank you I’m trying this as soon as sunlight hits and I pray it works from the looks of these awesome comments you did a heck of a job getting right to it and helping others Kudos bro!💯

MacBeatsByGoldClaggettt-wfvu
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I can't thank you enough for this video man!! My truck pulled this crap every week, when i pulled the ignition cover off and looked at the wire it was so loose it was just ridiculous but I put two small layers of duck tape around it and plugged it back in and it was real snug and it cranked right up. I couldn't even lock my doors becuz the security system wouldn't let it crank, but so far so good I haven't had it do it again so far anyway, but so far so good! Once again thank you for this video!!

ahankins
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Thank you so much for this video bro. I was stranded couldn't take my kids to school. Google the syemtoms came across this video and it was the problem again thanks.

keayremoore
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Your video and starting issue is exactly what my 2001 Silverado 2500 does intermittingly. It would not start but sounds like it wants to, then I wait a few minutes and it starts right up with no issues. Usually see it when the truck has been sitting idle for a few days. I am going to check that connection you mentioned. I think (hope) this resolves my issue. Thank you for sharing this

jimbenjamin
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Hey man I was about to take my 02 avalanche to the shop but this video help me a lot thanks it actually help me thanks

guadaluperamirez
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OK Guys.... AFTER WASTING MY WHOLE SUNDAY AFTERNOON... Looking at all these video's... 10 minutes on, 10 seconds off, 3 times in a row... 2 times in a row... 11 MINUTES on 20 seconds off.... DAMMIT..!!! Finally, I tried what I saw in a post.... TAKE THE NEGATIVE BATTERY CABLE Touch it to the Positive terminal, (this supposedly resets the computer) (may have to use a screwdriver as it is kinda short, to make the contact) Install the negative cable again... VWAAALAHHH...!! IT WORKED..!!!

steveh
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hey man great video it help me out alot. its actually showed me what I wanted to see an hear. my endless search for help on YouTube just ended thanks.

JAG