GM Service Manual Online
For 1990-2009 cars only

Notice: One of the reasons you should follow the Short Trip/City schedule, if you operate your vehicle under any of these conditions, is that these conditions cause engine oil to break down sooner.

Follow this schedule if any one of the following conditions is true for your vehicle:

    • Most trips are less than 8-16 km (5-10 mi). This is particularly important when outside temperatures are below freezing.
    • Most trips include extensive idling and/or low speed operation (such as door-to-door delivery and frequent driving in stop-and-go traffic).
    • Most trips are through dusty areas.
    • The vehicle frequently tows a trailer.
    • The vehicle operates at or near the maximum Gross Vehicle Weight (GVW) ratings.
    • The vehicle operates in hilly or mountainous terrain.