GMC 1996 Sierra Owner's Manual page 342

I
Short TripKity Maintenance Schedule
--
Gasoline Engines
I
48,000 Miles (80 000 km)
0
Change engine oil and filter (or every
3
months, whichever occurs first).
An Emission Control Service.
0
Lubricate chassis components; see footnote
#
(or every 3 months, whichever occurs first).
0
Check readfront axle fluid level and add
fluid as needed. Check constant velocity
joints and axle seals for leaking.
w
DATE
SERVICED B Y
ACTUAL MILEAGE
50,000 Miles (83 000 k
0
Change automatic transmission fluid
and filter if the vehicle's GVWR is over
8600 lbs. or if the vehicle is mainly driven
under one or more of these conditions:
-
In heavy city traffic where the outside
temperature regularly reaches 90°F
(32°C) or higher.
-
In hilly or mountainous terrain.
-
When doing frequent trailer towing.
7-16