1999 Suburban PCM

Jose Technician California Posted   Latest   Edited  
Updated
Driveability
Programming
1999 Chevrolet K1500 Suburban 5.7L (R L31) 4-spd (4L60-E) — 3GNFK16R8XG164366
Evap Vent Solenoid Powered On

I need to replace the VCM / PCM on this vehicle . The original problem was the pcm is keeping the vent solenoid powered on. My replacement pcm must not have the same software because the replacement keeps the secondary air pump powered on.

I used GM sps with a cardaq 2 to attempt to program the original unit and the replacement unit. The programming will not go through . I get an error message .

What is everyone's preferred method for ECU replacement on something this old? 

We have the original PCM, Cardone reman, salvage yard PCM

They all communicate with scanner

Thanks in advance 

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Mario Diagnostician
California
Mario Default
 

Hello Jose, I had the same problem a while ago, some times the the communication speed is not compatible, the only way to program that pcm is by using tech 2 or the carddaq plus one, not the cardan plus 2, same thing happened to me

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Sam Mobile Technician
Michigan
Sam Default
 

As a general rule anything prior to 05 gets the tech2. We have had problems with the remote programming online. So we use the old disk version (available several places) this method is almost failure proof. Otherwise we use an offboard adapter with tech2

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Oscar Diagnostician
Virginia
Oscar Default
 

Hi Jose, I have done this programming using the Tech2, under remote procedure. Using the pass through unit, the speed is way to fast for this old cars, and it will not go through.

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John Technician
Florida
John Default
 

What is the error message that you get? Try programming again and writedown the error code. Then call sps help number and they can possibly give you some guidance based on the error code number. As others have said, tech 2 pass thru in the way to go.

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Adam Diagnostician
Illinois
Adam Default
 

Tech 2 and "Remote programming" Not all, but most Class 2 GM modules requires this, especially 2000 and prior. Not a computer surgeon, but I gather due to speed and "language": Using something that talks in fast Latin (CarDaq) to something that listens (Class 2) in slow pig Latin.

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Jose Technician
California
Jose Update
 

Thanks for the quick reply, i had a feeling this thing was too old. Called the 1800 number for sps support and they verified everyone's reply. This thing needs tech 2. Thanks again everyone

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Paul Mechanic
Illinois
Paul Default
 

If you use the salvage one-as long as it came out of the similar optioned vehicle (engine size/trans)-just do theft relearn, 3 X 10 minutes and see if your issue is resolved, then go ahead and flash it with tech 2.

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Greg Technician
Colorado
Greg Default
 

Tech2win work, or must be classical Tech2?

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John Owner
New York
John Default
 

Greg, Tech2Win offers no programming. The rub of all of this yes remote programming with Tech2 is the preferred method of programming these older modules. Unfortunately, Tech2 Remote has been uncooperative on SPS for awhile. Although , I haven't tried it since SPS was down for maintenance last week. Maybe they fixed it. This forces you to procure Tis2000 SPS discs unfortunately.

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Anthony Technical Support Specialist
Pennsylvania
Anthony Default
   

Hi John: There's another rub that people are all too willing to forget. That is listening to all of those asswipes who told them to get rid of their Tech 2 (or DRB-III for Chrysler) because Tech2Win will do everything they need. I tried telling them but many listened to "the instructors" and others. Now that a new real Tech 2 is no longer available to purchase.... But what do I know?(rh) Guido

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Reid Owner/Technician
New Jersey
Reid Default
 

In a sense I feel somewhat relieved. I have been having trouble with Tech 2 Remote for quite some time and after talking to friends in the business was convinced that the problem was on my end. AC Delco Help Desk got me up and running a while back but it didn't last long. Are there also problems with Legacy Pass Thru? Only need it on rare occasions.

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Reid Owner/Technician
New Jersey
Reid Default
 

Most of the time i have been successful using the GM MDI by isolating the PCM from the other modules on the network. This won't work on everything though.

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Jose Technician
California
Jose Update
 

Thanks for everyone’s help. The local dealership helped us reprogram it, I guess they still have their Tech2. The issue we were having was not the theft relearn, the problem was our replacement PCMs were not set up to control the Secondary Air Pump relay. We needed to load the correct software onto the replacement module. This vehicle is fixed , thanks to all who helped

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