2001 GMC Jimmy Owner's Manual - Page 262

The compressor should operate for brief periods of time. If the sound continues for an extended period of time, your vehicle needs service. To keep your battery from being drained, you may want to remove the LD LEV fuse in the engine compartment fuse block until you can get your vehicle serviced (see "Fuses and Circuit Breakers" in the Index). Using heavier suspension components to get added durability might not change your weight ratings. Ask your dealer to help you load your vehicle the right way. Towing a Trailer CAUTION: If you don't use the correct equipment and drive properly, you can lose control when you pull a trailer. For example, if the trailer is too heavy, the brakes may not work well -- or even at all. You and your passengers could be seriously injured. Pull a trailer only if you have followed all the steps in this section. Ask your dealer for advice and information about towing a trailer with your vehicle. Add-On Equipment When you carry removable items, you may need to put a limit on how many people you carry inside your vehicle. Be sure to weigh your vehicle before you buy and install the new equipment. NOTICE: Your warranty doesn't cover parts or components that fail because of overloading. 4-46