Chevrolet 1993 S-10 Pickup Owner's Manual page 115

Tamper Resistant Odometer
Your odometer is tamper-resistant. The standard odometer will show silver
lines between the numbers if someone tries to turn
it
back. The digital
odometer will read ERROR if someone tries to turn it back.
Standard Cluster Digital Cluster
I
KO267
You may wonder what happens if your vehicle needs a new odometer
installed. If the new one can be set to the mileage total of the old odometer,
then it must be. But if it can't, then it's set at zero, and a label must be put
on the driver's door to show the old mileage reading when the new odometer
was installed.
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