1995 GMC Yukon Owner's Manual - Page 327

Air Conditioning Every now and then have your dealership check your air conditioning system to be sure it has not lost any cooling ability. I f you think the system is not working properly, have your dealership check it out as soon as possible. The air conditioningwill not work when the temperature is below 40°F (4°C). Fluid Leak Check After the vehicle has been parked for a while, inspect the surface under the vehicle for water, oil, fuel or other fluids.Water dripping from the air conditioning system after it has been used is normal. If you notice fuel leaks or fumes,the causes should be found and corrected at once. Lock Cylinders To be sure your locks operate properly, they must be lubricated. Your vehicle's maintenance schedule will tell you how often to lubricate them. See "Recommended Fluids and Lubricants" i n the Index for the proper lubricant to use. You should not use penetrating oils because they could wash out the factory installed lubricant and cause the lock to bind. De-icers which contain alcohol could also wash away the lubricant, so be sure to lubricate the lock after using a de-icer of this type. Battery Every new GM vehicle has a Delco Freedom@battery. You never have to add water to one of these. When it's time for a new battery, we recommend a Delco Freedom@ battery. Get one that has the replacement number shown on the original battery's label. Vehicle Storage If you're not going to drive your vehicle for 25 days or more, take off the black, negative (-) cable from the battery. This will help keep your battery from running down. 6-45