1998 GMC Suburban Owner's Manual - Page 315

How to Add Fluid Refer to the Maintenance Schedule to determine what kind of transmission fluid to use. See "Recommended Fluids and Lubricants" in the Index. Add fluid only after checkingthe transmission tluid while it is hot. (A cold check is used only as a reference.) If the fluid level is low, add only enough of the proper fluid to bring the level up to the HOT area for a hot check. It doesn't take much fluid. generally less than one pint (0.5 L). Don 'f overfill. Rear Axle When to Check and Change Lubricant Refer to the Maintenance Schedule to determine how often to check the lubricant and when to change it. See "Scheduled Maintenance Services" i n the Index. How to Check Lubricant NOTICE: We recommend you use only fluid labeled DEXRON@-111,because fluid with that label is made especially for your automatic transmission. Damage caused by fluid other than DEXRON-I11 is not covered by your new vehicle warranty. 0 After adding fluid, recheck the fluid level as described under "How to Check." When the correct tluid level is obtained, push the dipstick back in all the way; then flip the handle down to lock the dipstick in place. If the level is below the bottom of the filler plug hole, you'll need to add some lubricant. Add enough lubricant to raise the level to the bottom of the filler plug hole. 6-23