Urgent help needed
Thread Starter
Staging Lane
Joined: Aug 2008
Posts: 65
Likes: 0
The LS4 is not the 5.3 from the trucks. The only things that have LS4's are 05-08 Pontiac Grand Prix GXP's, 06-07 Chevrolet Monte Carlo SS's, 06-09 Impala SS's, and i think 08-09 Buick Lacrosse Supers.
That engine is a 5.3 liter Iron Block...the LS4 is a 5.3 Aluminum Block derived from the LS1/LS6/LS2.
WHY DO PEOPLE THINK THEY ARE THE SAME ENGINE......
Do your homework....
That engine is a 5.3 liter Iron Block...the LS4 is a 5.3 Aluminum Block derived from the LS1/LS6/LS2.
WHY DO PEOPLE THINK THEY ARE THE SAME ENGINE......
Do your homework....I hooked it all up and tried to start the car and it said in the info center that it is "disabled due to anti-theft" or something like that and scanned the OBD2 port with my scanner and got P0315: Crankshaft position system variation values are not stored in the PCM memory. So guess I gotta continue the waiting game, pay $60 to tow to the stealership and another $105 to flash the PCM to my car
If only someone local had HP tuners and could program AND tune the car all at the same time for less then everything I gotta do just to make it stock by the dealer.
KNOCKING ON WOOD THAT I CAN GET THE DAMN CAR RUNNING BY MONDAY NOW.
Thread Starter
Staging Lane
Joined: Aug 2008
Posts: 65
Likes: 0
The '06 Envoy Denali that the ECM came from also has an aluminum GEN IV LH6 5.3L block. The LY5 has an iron block.
Thread Starter
Staging Lane
Joined: Aug 2008
Posts: 65
Likes: 0
Thread Starter
Staging Lane
Joined: Aug 2008
Posts: 65
Likes: 0
The one from the dealer was $600 +. The one on Ebay would have been about $250 U.S. programmed plus shipping (If they ended doing it properly). I got the used ECM for $100 CAD, the dealer might end up costing $105 CAD for the programming, so overall almost the same when taking into account the towing costs as the Ebay one would have been (the Ebay one was also a used ECM that he'd program).
The one from the dealer was $600 +. The one on Ebay would have been about $250 U.S. programmed plus shipping (If they ended doing it properly). I got the used ECM for $100 CAD, the dealer might end up costing $105 CAD for the programming, so overall almost the same when taking into account the towing costs as the Ebay one would have been (the Ebay one was also a used ECM that he'd program).
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I came across this issue when first using HPT. Seems my ECM came out of the factory with a different calibration from what GM showed in their service website, and HPT wouldn't allow me to write an updated tune because the VIN and calibration were not consistent with the published data. Had to pay to have the dealership reflash it before I could do any tuning.
Thread Starter
Staging Lane
Joined: Aug 2008
Posts: 65
Likes: 0
HP tuners is quite picky about what it will write to an ECM. You may have to have the dealership reflash the ECM with the stock tune and VIN before HPT can be used to disable VATS.
I came across this issue when first using HPT. Seems my ECM came out of the factory with a different calibration from what GM showed in their service website, and HPT wouldn't allow me to write an updated tune because the VIN and calibration were not consistent with the published data. Had to pay to have the dealership reflash it before I could do any tuning.
I came across this issue when first using HPT. Seems my ECM came out of the factory with a different calibration from what GM showed in their service website, and HPT wouldn't allow me to write an updated tune because the VIN and calibration were not consistent with the published data. Had to pay to have the dealership reflash it before I could do any tuning.
It was a couple of years ago, but I think I ended up paying $60. They really didn't want to reflash the ECM. Had to argue with the service manager for about half an hour and point out that the ECM didn't actually have the operating system that the factory said was supposed to be loaded.
Thread Starter
Staging Lane
Joined: Aug 2008
Posts: 65
Likes: 0
It was a couple of years ago, but I think I ended up paying $60. They really didn't want to reflash the ECM. Had to argue with the service manager for about half an hour and point out that the ECM didn't actually have the operating system that the factory said was supposed to be loaded.
