1994 GMC Jimmy Owner's Manual - Page 120

Tamper Resistant Odometer Standard Cluster = Digital Cluster Your odometer is tamper resistant. It will show silver lines between the numbers if someone tries to turn it back. ERROR if someone tries to turn it back. The digital odometer will read a You may wonder what happens if your vehicle needs new odometer installed. If the new one can be set the mileage totalof the old odometer, to then it must be. But ifit can't, then it's set at zero, and a label must put be on the driver's door to show the old mileage reading when the new odometer was installed. 2-66