Fuel trims etc are learned.
On the tune. It's like Z34 mentions. As the model year etc goes by, GM did tweaks. Therefore you'd ideally want the latest/most current software for that year.
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11-07-2011
Fuel trims etc are learned.
On the tune. It's like Z34 mentions. As the model year etc goes by, GM did tweaks. Therefore you'd ideally want the latest/most current software for that year.
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