a gopod tune will rid of VATS

 

Since

You are clearly in favor of the tune to fix this issue. I ask you the following questions. Does your truck have the tune? How much does a tune cost?

 

PassLock issue. When the BCM doesn't get the correct signal from the ignition switch resistor it will shut down the engine start. There is a 10 minute timer set during which time no starting is allowed. After 10 minutes the system resets. If the BCM gets the correct signal the next time, the engine will start. If not, back to the 10 minute wait.

It's usually a problem with the ignition switch. About $80 and an hour for a competent DIYer, including the required 30 minute relearn.

Or, as mentioned, find a tuner.

 

I already tried this part with no luck. D1462G (GM15795321)
I only replaced the black part of the assy but it failed to crank the vehicle over after relearn. No door chime and an engine light pertaining to a failed communication to the transmission.
After I reinstalled the original black part, everything works until it decides to act up again.

 

Have the VATS tuned out, never happen again.

 

I'm going to ask this question again, as it seems that no one has answered it yet. The PassLock system involves two modules, the ECM and the BCM. When VATS is 'tuned out' are both of the modules 'tuned'? If only the ECM is 'tuned' will the PassLock light in the cluster remain off?

 

A no crank and a no start are two separate issues. Obviously if there is a no crank there will be no start. A PassLock problem will not stop the engine from cranking. It will only prevent it from starting. PassLock is a simple system with only a few components. The ignition switch is the PassLock weak point.

A no crank condition can have many causes. Not only with the ignition switch, but with wiring, relays and starter. Also a lot of the start system components are located in the engine compartment, subject to heat and corrosion. In other words, a no crank situation is not as likely to be caused by the ignition switch as the PassLock system.

An intermittent problem is a troubleshooting nightmare and guys often resort to the parts cannon. Sometimes works, sometimes doesn't. A no crank combined with the Passlock 10 minute delay frequently can be traced to a defective ignition switch.

 

You may have two problems. The 10 minute wait only comes from the PassLock system. If you ONLY had a no crank problem and no PassLock problem, there wouldn't be a 10 minute wait.

The "key switch assy black electrical piece" is the ignition switch. Hold on to it, you may need it.

You do understand that if the trsnsmission is not communicating with the ECM the engine probably will not crank, correct?

Maybe see if you can find someone with a scan tool that can tell you what the code is and you can let us know what the code is.

 

Talked to a GM service rep who is a good friend of mine, hopefully get this hashed out.

 

Believe me or not! I have a 2010 5.3 4x4 crew cab and it did the No start for a couple years. My wife was ready to trade it off. I changed the ignition, the HVAC control module. HVAC resistor, HVAC harness wires, ground on the passenger fender well. Problem was solved when I changed out the HVAC Blower Motor. Never had a no start since. These trucks have Gremlins everywhere.

 

I changed the HVAC blower motor also.
I have an appointment with a seasoned tech on the 29th.

 

Furthermore I got this from a GM site about the VATS...

"This system seems to cause much confusion, stress, and misery. Hopefully, this will help alleviate
some of that. VATS stands for Vehicle Anti-Theft System. It is commonly referred to as PassKey.
Later versions include PassKeyII, PassKeyIII and PassLock (which uses no resistor "pellet"). GM
first introduced VATS in 1985 on the Chevrolet Corvette, and after proving successful, was later
introduced in other models in later years."

 

Most reputable tuners will cost 100 for the credits to tune your vehicle, plus 100 to 200 for the tune itself depending on what you want. It is not as easy as changing a sensor, you have to replace the lock cylinder and keys and a dealership has to reset the system in older 2007 and back that do not have a relearn option. So there are costs associated with anyway you do it. and benefits from both, but, in my opinion, the tune is worth the money. I however do not do the tunes, I am a novice, I let the professionals do it and let them help me modify mine.

 

For you guys looking for a tune. You need to find a reputable tuner in your area that has HPTuners. They can explain more of what they can and cannot do for you. If you can get a hold of SuperMod, a member here, he can do a remote tune for you. The tuner I used doesn't do remote and is local to me.

 

Having owned my 2005 since day one and having dealt with the issue, Changing the ignition switch electronics does not always fix the issue. I know, been there and done that. Now I do not have to worry about that at all, because VATS in my truck is disabled, and the passlock light on my dash has been disabled, so I do not know or see anything else about it. It was done on my 3.5 ECM and is done on my V8 swap ECM. It is the best way I have ever seen it fixed. One time and I had my 3.5 tuned to get better fuel mileage, have more power and have firmer shifts and less uphill in and out of OD in the transmission. Cost me 350 for the original tune. Was worth every penny.

 

My opinion on that is, after paying $75 back in 2011 and the switch not fixing my issue, And faced with having to spend another 75 to try again, $350 was not bad considering all the other +'s that came with it.

 

That's fair, I'm glad you're happy with that and for sharing the cost. Most guys here go the less costly the better route so when all options including cost are given each person is not totally in the dark about making the right choice for them. Information and personal choice are good to have.

 

On my 2009 2.4, I had the theft deterrent disabled in the ECM. It’s been great since! I understand there are three main components each of which has a typical 7 year life span and the FET sensor can’t be purchased separately. I just didn’t want to deal with it.

 

If you have a 2009 2.4, it isn't a Colorado/Canyon.

Do you have a link to a report for: "typical 7 year life span".

What is an FET sensor?

 

Assumed options.
-Cut white with blue stripe wire while running, cut smart. Not white with green stripe which is similar.
Reconnect wires after battery change\code clearing, crank disconnect again. Some say a switch works here.
-Have a new key cut from VIN not from an old key to restore the original length to work the lever properly in the steering column.
-Replace ign switch have Locksmith\dealer reprogram.
Optimum Solution:
-Have it deleted in the tune.
I have an '09 5.3 Crew with 257,500 miles.
I don't have this problem but read the whole thread anyway. Interesting.
After reading this thread I don't see this issue with '09s and later near as much.(guessing)
Another discussion:

How to: Permanently disable the passlock II system.

How to: Permanently disable the passlock II system. I assume no responsibility if you harm your vehicle with this mod. ( follow the directions, this includes stepping one! ) Vehicle Information: 2006 Chevrolet Colorado, Z71, Crew Cab Tool Needed: 1. Wire Cutters/scissors 2. Electrical Tape...

www.coloradofans.com

 

An update to my issue, still crossing my fingers.
My 12 GMC Canyon 5.3 sat at the GM dealer 10 days as they could not get it to replicate the no crank, no start issue. Even though it happened to me 3 times the day prior to taking it to the dealership.
The dealership said they couldn't fix anything without a code to read as there were none. I didn't have the issue for the next 30 days waiting to get into Dynotune, which is my closest tuner to me.
Ironically after I got to Dynotune yesterday, the vehicle wouldn't start to bring it into the shop. He used a HP tuner and turned off the VATS, vehicle anti-theft system, like what was displayed in post #14. He proceeded to tune the vehicle to his liking and commented it may have gained 8-12 HP at higher rpm's. In the end, vehicle seems to start and run normal and hope the problem is cured. Cost $265

 

Thanks for the update.

$265 seems to be a reasonable price for a security disable and a tune. Tuners are paid for their knowledge as well as their time and usually have some fairly expensive equipment. There's also a fee involved if they have to log onto GM's website.

 

He said it odd this model used the E67 ECM as it is usually used on the performance side of GM's.

 

Back to square 1, left the pickup at my daughters for a couple weeks while my wife and I flew out and visited my youngest. She tried to start it and pick us up at the airport, with a no crank and no start.
She picked us up with her vehicle and it started right up when we got back to her place from the airport.

 

If I had a nickle for every time I have said this I would have more money than Musk. THE PASSLOCK SYSTEM IN THE 1ST GEN TRUCKS WILL NOT PREVENT THE ENGINE FROM CRANKING. You can have a situation where the PassLock system is preventing the engine froim starting, but if the engine is also not cranking, YOU HAVE A PROBLEM BESIDES THE PASSLOCK issue. The ignition switch can fail internally and cause both a PassLock and a no crank. That's just an example.

If you have a no crank problem, fix the no crank problem. Mucking with the PassLock system is not going to fix a no crank issue.

 

So it has to be the mechanical part of the ignition switch that is worn out?

 

So here's the deal...GM in they're infinite cheapness put these garbage ignition switches not only in these trucks but other models as well. NO CODE is ever going to give you an answer. And this is likely only the beginning of electric BS you can expect from this thing. Dynamite is the only solution.

 

You can thank CARB and the federales for most of this. They drive mileage increases, and computer controlled engines and it's software is the only way to get there.

Once the cat was out of the bag, everything else was brought along. When I left 7 years ago, upper end vehicles had over 40 computers or microcontrollers (a small computer on a chip) on them.

You can thank CARB and the federales for most of this. They drive mileage increases, and computer controlled engines and it's software is the only way to get there.

Once the cat was out of the bag, everything else was brought along. When I left 7 years ago, upper end vehicles had over 40 computers or microcontrollers (a small computer on a chip) on them.

 

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What are vat’s

 

vehicle anti theft