Haven't found any 3 bar OS's for e38 pcms for a silverado, is this even possible? Gna do a SD tune on a 2010 silverado but it only has the 2 bar upgrade option. Customer has the zr1 map sensor. Any help?
Can i just use the zr1 sensor and scale it accordingly and the OS will just be limited to read up to 2.5 bar?