tune
Instructor
Joined: Jun 2013
Posts: 247
Likes: 12
From: Canon City CO
What does a tune do that would cause you to loose your warranty? What are the other risks to doing a tune besides loosing the warranty? I thought a professional tune was a good thing but I am a new to this.
Race Director
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
A tune will change the calibrations in the ECM/PCM which ever. Controling air fuel mixture and timing among other things.
Why would you expect GM to warranty the engine after these changes.
From the plant the car is set up run in all different climates and altitudes. A custom tune will zero in on obtaining more performance by dialing in the values for your area and needs.
Basically it just narrows down the parameters optimizing for increased performance.
Usually runs around $500 and a dyno will be needed as well as some time spent on the street with the lap top.
Why would you expect GM to warranty the engine after these changes.
From the plant the car is set up run in all different climates and altitudes. A custom tune will zero in on obtaining more performance by dialing in the values for your area and needs.
Basically it just narrows down the parameters optimizing for increased performance.
Usually runs around $500 and a dyno will be needed as well as some time spent on the street with the lap top.
Race Director
Joined: Dec 2006
Posts: 12,333
Likes: 2,880
From: Fort Worth, Texas
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