1998 GMC Savana Van Owner's Manual - Page 314

I KEEP ENGINE OIL AT THE PROPER LEVEL AND CHANGE AS RECOMMENDED IMPORTANT: I Introduction Your Vehicle and the Environment Proper vehicle maintenance not only helps keep your to vehicle in good workingcondition, but also helps the environment. All recommended maintenance procedures are important. Improper vehicle maintenance can even affect the qualityof the air we breathe. Improper fluid levels or the wrong tire inflation can increase the level of emissions from your vehicle. To help protect our environment, and to keep your vehicle in good condition, please maintain your vehicle properly. Have you purchused the GM Protection Plan? The Plan supplements your new vehicle warranties. See your Warranty and Owner Assistance booklet,or your GM dealerfor detuils. 7-2