Used wizard to update parameters for 275/60R20 tires. Wizard updated 3 values, driven and non driven tire diameter and vss tire revs per mile. Dash displays "adaptive cruise control temporarily unavailable" when turning on cruise. Return to stock cruise works fine.
Likely it's something that becomes a mismatch between values between two different systems that work together. But that is just a guess as HP Tuners is only able to flash the PCM/TCM and nothing else.
I'd live with the speedo being off just slightly to keep the adaptive cruise working.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
The mismatch is what I was thinking. Maybe the tcm, which I’ve not licensed?
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