2002 GMC YUKON XL engine

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Page 316 of 407

GMC YUKON XL 2002  Owners Manual 6-18 1. To remove the engine air cleaner/filter, loosen the
screws on the cover.
2. Lift the cover upward and remove the engine air
cleaner/filter out of the air cleaner housing. Care
should be taken

Page 318 of 407

GMC YUKON XL 2002  Owners Manual 6-20Automatic Transmission Fluid When to Check and Change A good time to check your automatic transmission fluid
level is when the engine oil is changed.
Change both the fluid and filter every 50,000

Page 319 of 407

GMC YUKON XL 2002  Owners Manual 6-21Wait at least 30 minutes before checking the
transmission fluid level if you have been driving:
 When outside temperatures are above 90  F (32  C).
 At high speed for quite a while.
 In heavy

Page 320 of 407

GMC YUKON XL 2002  Owners Manual 6-22 Then, without shutting off the engine, follow these steps:
Your vehicle will have
either the transmission
dipstick handle labeled
ªTRANS/LOCKº or
will be labeled with
the graphic shown.
1. Flip

Page 324 of 407

GMC YUKON XL 2002  Owners Manual 6-26 When the differential is cold, add enough lubricant 
to raise the level to 1/2 inch (12 mm) below the filler
plug hole.
When the differential is at operating temperature
(warm), add enough lubric

Page 325 of 407

GMC YUKON XL 2002  Owners Manual 6-27What to Use Use a mixture of one
- half  clean, drinkable water  and
one
- half DEX
- COOL 
 coolant which wont damage
aluminum parts. If you use this coolant mixture, you
dont need to add anyt

Page 326 of 407

GMC YUKON XL 2002  Owners Manual 6-28Checking Coolant The coolant surge tank 
is located in the engine
compartment on the
passengers side of 
the vehicle.
See ªEngine Compartment Overviewº in the Index for
more information on loca

Page 327 of 407

GMC YUKON XL 2002  Owners Manual 6-29Adding Coolant
If you need more coolant, add the proper DEX
- COOL 
coolant mixture  at the surge tank , but only when the
engine is cool.
CAUTION:You can be burned if you spill coolant on hot
en