Can a Computer Upgrade Can be Uninstalled
Thread Starter
Instructor
Joined: Aug 2000
Posts: 233
Likes: 0
From: Clearwater, FL, USA
Can a Computer Upgrade Can be Uninstalled
I hope there's a Chevy C5 Tech in the house. My C5 had a slightly uneven idle in park so my dealer reprogrammed/upgraded my car's computer. Apparently, there's a tech bulletin about it. The problem is, the upgrade seemingly detuned my car and now it's not as responsive especially at lower RPM's. In my opinion, the dealer used a generic fix for a specific problem. Also, my Hypertech III won't work now. (Before going to the dealer, all settings were put back to stock). Can my dealer uninstall the upgrade? Thanks in advance, Rick
Drifting
Joined: Apr 2001
Posts: 1,779
Likes: 6
From: LOS ANGELES CA.
Re: Can a Computer Upgrade Can be Uninstalled (00PewtVetteCpe)
If you removed the program and returned it to stock,you should reinstall your Hypertech progroam.That should take care of the problem.If I am reading your thread correctly. :chevy :chevy :flag :chevy :chevy
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Re: Can a Computer Upgrade Can be Uninstalled (00PewtVetteCpe)
Page C-5 TECH on this one. He should be able to answer your question. As long as you returned everything to stock, as you mentioned, the Hypertech should be able to be re-downloaded to a stock PCM. It almost sounds as thouigh the wrong program was downloaded to your car by your dealer.
Ed
[Modified by C5XTASY, 12:06 PM 1/13/2002]
Ed
[Modified by C5XTASY, 12:06 PM 1/13/2002]
Drifting
Joined: Jun 2000
Posts: 1,338
Likes: 0
From: Fontana CA
Re: Can a Computer Upgrade Can be Uninstalled (C5XTASY)
The previous, stock version of your program should be available to your dealer on the GM computer system. The program they most recently loaded cen not be reversed, they will simply replace the program with a fresh copy of the old version.
Former Vendor
Joined: Apr 2001
Posts: 10,976
Likes: 21
From: FL
St. Jude Donor '13
Re: Can a Computer Upgrade Can be Uninstalled (00PewtVetteCpe)
There is no service bulletin for an updated PCM program for a 2000 to address your specific complaint :bs ,but that doesnt mean there is not a different program available...If you E-mail me your VIN#,I can verify this.
Any new program is based on the one retreived from your vehicle,so it is impossible to download an incorrect program...Yes,an old program can be reinstalled...For example,there is a reprogram for the belt noise on the 97-2000 that raises the vehicles idle to correct the noise.Unfortunatly,the program raises the idle to high so that it is like you have the cruise control on,so I uninstalled it.GM relized this and came out with a different fix (alternator and tensioner) .Hopefully this is not the program they put in your vehicle...
Any new program is based on the one retreived from your vehicle,so it is impossible to download an incorrect program...Yes,an old program can be reinstalled...For example,there is a reprogram for the belt noise on the 97-2000 that raises the vehicles idle to correct the noise.Unfortunatly,the program raises the idle to high so that it is like you have the cruise control on,so I uninstalled it.GM relized this and came out with a different fix (alternator and tensioner) .Hopefully this is not the program they put in your vehicle...
Thread Starter
Instructor
Joined: Aug 2000
Posts: 233
Likes: 0
From: Clearwater, FL, USA
Re: Can a Computer Upgrade Can be Uninstalled (00PewtVetteCpe)
Thank you all for your information. The Corvetteforum is the best! I'll email my VIN# to you now, C-5 Tech, thanks. Rick
Pro
Joined: Apr 2001
Posts: 672
Likes: 1
From: Scottsdale AZ
Re: Can a Computer Upgrade Can be Uninstalled (00PewtVetteCpe)
Rick,
The easiest way to force a full upload of the current GM PCM program is to answer "NO" to the question is this VIN# correct on the TECH2. This forces a full reload of the current GM programs. It assumes the PCM is a replacement and the VIN# must be rewritten.
This is used for replacing PCM's as well as getting rid of a computer program that doesn't work correctly.
:cheers:
The easiest way to force a full upload of the current GM PCM program is to answer "NO" to the question is this VIN# correct on the TECH2. This forces a full reload of the current GM programs. It assumes the PCM is a replacement and the VIN# must be rewritten.
This is used for replacing PCM's as well as getting rid of a computer program that doesn't work correctly.
:cheers:
Le Mans Master
Joined: Mar 2000
Posts: 7,805
Likes: 0
From: If you read this, you'll go blind
Re: Can a Computer Upgrade Can be Uninstalled
Dealers cannot go back to earlier versions of PCM programs. They only have the latest and "greatest".
Your Hypertech unit should still work. If it doesn't, they will update it for you.
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