Remove (2) 7mm bolts and unblock the harness from the ECU/ECM.
LS SWAP ECU FLASH DRIVER
Remove the negative on Tylers truck, remove his ECM/ECU which is under the hood behind the driver headlight/core support. Lets call Tyler and get his 2002 Chevy 1500 5.3L truck over here. VATS is enabled and you will not be able to fire up the LS. 4.8L, 5.3L 5.7L or 6.0L it doesn’t matter.Įxample: You get your ls1 and t56 in, you wire up the harness (tutorial will come if requested) and you try to start up and it starts and shuts off right away…. This method is FREE! The only part you need if a friend or someone with a early 2000 Chevy truck with a LS style engine. If you get the SIKKY LS swap kit, it offers a good discount on this method: Wiring Specialties HP Tuners.įinally my favorite method! VATS Confusion BCM Trick. A very popular method to use it the one from wiring specialties. A few simple Fuel and Timing map changes for more power, even remove the MAF and convert your ECU to Map only. Depending on the tuner again, they may change a few parameters for you since they have the ecu already.
If you decide to send it to one the cost is usually between $50-$150 which really isn’t bad. You simply send your LS1 ECU to a tuner or purchase HP Tuner and do it yourself. This is probably one of the most cost effective vs time methods there is. This is the easiest method but probably the most expensive rout to go with. It usually takes some time to figure out which resistor is the right one. This is a pack of resisters you solder in which give the proper resistance as the original key would to the system to allow it to start. Methods to Bypass VATS Resistor Pack (cheap) It’s honestly the easiest part about the entire swap. Dropping in the motor and transmission is the cake part but 9/10 times people freak out about the wiring. Hardly ever with the ignition system/Key and BCM (Body Control Module).
The theory behind it is there, but when it comes down to swapping these into our Nissan 240sx, it is usually an issue since we usually buy the swap with T56, Long Block, ECU, and Wiring harness. So now you know VATS is a form of security system GM started using around the mid to late 1980’s. Just looking at the keys you can’t tell the difference. GM uses 15 different resistors in their vats keys. GM first started using the Vats key in 1986 on the Corvettes, then some of the Cadillac’s, ect. The black chip on the blade of the key is actually a resister. But because of the popularity of calling it a computer chip key, so will we. This key or “Chip” has nothing to do with a computer, nor is it a chip. Lots of people refer to this type of key, as a ” computer Chip key”. Vats stands for Vehicle Anti Theft System.
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