It should be used. The potential for injury to third parties is too great not to do so. I don't care about carfax or the things value. If onstar stops it without issues there is no damage to the vehicle and no reason to reduce its value anyway.

- Peter.

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2021 Chevrolet Spark
Formerly...
2000 GMC Sonoma
1981 240D 4spd stick. 347000 miles. Deceased Feb 14 2021
2002 Kia Rio. Worst crap on four wheels
1981 240D 4spd stick. 389000 miles.
1984 123 200
1979 116 280S
1972 Cadillac Sedan DeVille
1971 108 280S