Electrical System; Battery; Bulb Replacement - GMC 1999 Sierra 1500 Pickup Owner's Manual

Service & Appearance Care
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.
Tailgate Handle
The tailgate handle pivot points on your vehicle should be lubricated to keep
it working smoothly.
Your maintenance schedule will tell you how often to lubricate the handle.
See "Recommended Fluids and Lubricants" in the Index for the proper
lubricant to use.
Electrical System
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 catalog 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.
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Batteries have acid that can burn you and gas that can explode. You
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can be badly hurt if you aren't careful. See "Jump Starting" in the
Index for tips on working around a battery without getting hurt.
Contact your dealer to learn how to prepare your vehicle for longer periods.
Bulb Replacement
Before you replace any bulbs, be sure that all the lights are off and the
engine isn't running.
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