1997 Chevrolet S10 Pickup Owner's Manual - Page 130
1997 Chevrolet S10 Pickup Manual
Page 130 highlights
THEFTLOCK is designed to distlourage theft -of.yo-ur radio.. It works by wing a secret cod9.to disable all m&o functions whenever batrery power is-removed. The .THEFTLOCK feature for the radio may be used..or igrrared. If igriofed,.the system plays.normally -and~e :radio is not p t e c t e d by'the featufe, If THEFTLO'CM is activated, your radio will no.t operate if-stolen. When THEFTLOCK-is 8c.tivated;the-radio will display L0.C to in.&cate a 1ocked:conditiananytime battery power is re;lnoved. If YOU^ battery loses powerfor any rewon, you must unlock the radio with the seem code before it will op-erare. The instructions which follow ,explain how to enter. your secfe't code to activate the THEFTLOCK system. It is recommended that.you read through all niad s,teps befure starting the procedure.