GMC Yukon 2025 - Four-Wheel Drive; Front Axle

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-17942154) - 2025
Vehicle Care 333
{ Warning
W
ARNING: Battery posts, terminals and
r
elated accessories can expose you
to chemicals including lead and lead
compounds, which are known to the State
of California to cause cancer and birth
defects or other reproductive harm. Wash
hands after handling. For more information
go to www.P65Warnings.ca.gov.
See C
alifornia Proposition 65 Warning 3
1.
Vehicle Storage
{ W
arning
B
atteries have acid that can burn you and
ga
s that can explode. You can be badly
hurt if you are not careful. Always wear
eye protection. See Jump Starting - North
America 3380 for tips on working around
abattery without getting hurt.
Infrequent Usage: Remove the black, negative
(−
) cable from the battery to keep the battery
from running down.
Extended Storage: Remove the black, negative
(
−) cable from the battery or use abattery
trickle charger.
Four-Wheel Drive
Transfer Case
When to Check Lubricant
Refer to Maintenance Schedule 3398 to
determine when to check the lubricant.
How to Check Lubricant
1. Fill Plug
2.
Drain Plug
To get an accurate reading, the vehicle should
be
on alevel surface.
If the level is below the bottom of the fill plug
(1) hole, located on the transfer case, some
lubricant will need to be added. Add enough
lubricant to raise the level to the bottom of the
fill plug (1) hole. Use care not to overtighten
the plug.
When to Change Lubricant
Refer to Maintenance Schedule 3398 to
determine how often to change the lubricant.
What to Use
Refer to Recommended Fluids and Lubricants
3402 to determine what kind of lubricant
to use.
Front Axle
When to Check Lubricant
It is not necessary to regularly check the front
axle fluid unless aleak is suspected or an
unusual noise is heard. Afluid loss could
indicate aproblem. Have it inspected and
repaired. This service can be complex. See
your dealer.