Aftermarket chips

[Silveradoday11]

How to figure out if aftermarket performance chip is installed on my 2011 Silverado 

[Jsdirt]

Those days are long gone. Hasn't been an actual chip you install for over 23 years. These days it's all write/rewrite.

 

Find a garage that has either a Tech 2 or MDI scan tool, and they should be able to see any aftermarket reflashes.

[Silveradoday11]

So, I'll have to assume the program can be rewritten... cause I was told that without a code it could not 

[Mikebtte]

Ya,

As said before. Chips are long gone but aftermarket programming is available. What you trying to figure out for? Are you wanting to install one or are you having an issue.

[Jsdirt]

Depends on what wrote it. If it was done at a speed shop, it should be able to be rewritten. If it was a handheld "program in a can" type device, it might be more difficult.

 

No matter what is in there, reprogramming to stock is always possible. Just DO NOT go to ANY dealer for this.  You'll thank me later. Find a garage that has the capability. Might have to do some searching, but it will be worth it.

[Silveradoday11]

My check engine light came on showing a PO315 obd code,  I called the dealership and they said that the previous owner had some aftermarket performance chip in it and the there's nothing they can do that the truck is in perfect working order 

[SierraNation]

Maybe this helps... https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.obd-codes.com/p0315&ved=2ahUKEwjs0amgg8HiAhXuct8KHYfZAUkQFjADegQIARAB&usg=AOvVaw3xhRMlz_1sKn2nCyaLTHOu&cshid=1559142912529

 

 

I don't see anywhere in here that an aftermarket chip could be the cause.. 

[Silveradoday11]

Thanks,  I'll check it out... let the fun begin 

[Jsdirt]

That's a crank variation relearn code - any bi-directional scan tool can perform this in less than 5 minutes. 

 

The response you got is EXACTLY why I tell everyone to stay the hell away from any dealership! It's not the tech's fault - their hands are tied by corporate. This is a CORPORATE problem, and always has been.

[Silveradoday11]

That's what I told them, after researching the code first...and they said it can't be done without a proper code for it 

[Jsdirt]

Just find another non-dealer garage to do the work.

 

Is it misfiring? If not, I wouldn't even bother with it, unless you live somewhere where you have to have emission testing. In that case you don't have much of a choice, unfortunately.

[Silveradoday11]

Thanks for the advice 

[Jsdirt]

No problem - hope you get it straightened out.

[Doug_Scott]

Bit of a story first, I put 4.10 gears in my 2010, in 2010.  Dealer could not reflash to correct speedo, GM tech line refused to supply a bin to correct speedo because they don't support just putting 4.10 gears in.  I don't get it, 4.10 gears actually make it easier on the powertrain, but who am I, just the customer.  Anyways, I was already talking to blackbear about getting a tune and he said he could fix the speedo as well.  Since my truck was brand new I was kind of concerned about the tune and warranty.  My dealer treats me great, but, you never know.  Justin got me replacement ECM and tcm and he did the speedo fix on the ECM and shipped both pieces to me.  I was going to a live tune session 3 months later, so that's why he sent them out.  I replaced both and after relearning the security thing so the truck would start I got the same error code.  I went to my dealer and told the service manager I just needed some relearn procedure due to my swapping the ECM to correct my speedometer.  He was still pissed at the tech line for effectively shutting down every post sale gear changes that they usually get after new orders are closed off and they have to sell what they can find.  Never really thought they would have that many gear swaps, but they did.  They never had an issue before my truck either.  They did the relearn so quick I didn't even make it to lounge.  For free as well. Got the blackberry tune that July.  Best mod ever.  

Pretty sure changing the crank sensor may trigger that code as well.  I would just show up saying you swapped the sensor on the side of the road while your pregnant wife was in labour, and now you need the relearn done so you can take your newborn home.  Wouldn't want to have the truck give out again. Shouldn't have to resort to shit like this, but sometimes it is actually fun to make then feel bad. 

[Silveradoday11]

Hahaha... thanks for the story and the advice and I am going to try using it on the dealership