1994 GMC Sonoma Owner's Manual - Page 52
1994 GMC Sonoma Manual
Page 52 highlights
There are several ways to lock and unlock your vehicle: From the outside: Use your door key. From the inside: To lock the door, slide the lever on your inside door to LOCK. To unlock the door, slide the lever on your inside doortoward you. You will see a red area on the lever.
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