In Brief; Initial Drive Information - GMC Duramax Diesel 2015 Owner's Manual

In Brief

Initial Drive Information

Transmission . . . . . . . . . . . . . . . . . . 1-1
Performance and Maintenance
Engine Oil Life System . . . . . . . . 1-2
Diesel Particulate Filter . . . . . . . 1-2
Diesel Exhaust Fluid . . . . . . . . . . 1-3
Initial Drive
Information
Transmission
Pickup Models
Cold Operation
When temperatures are very cold,
the transmission will prevent certain
operations to protect against
damage. The information below
shows shift range availability based
on transmission oil temperature:
All shift ranges available at
25°C ( 13°F) or above.
2 (Second) and 3 (Third) shift
ranges only at 35°C ( 31°F) to
25°C ( 13°F).
2 (Second) shift range only at
35°C ( 31°F) or lower.
Torque converter clutch operation
will also be prevented when air or
transmission oil temperatures are
below certain levels.
In Brief
For areas where ambient
temperatures are below 40°C
( 40°F), use synthetic transmission
fluid approved to Allison
®
Transmission specification
TES-295. See Recommended
Fluids and Lubricants on page 11-8
and Automatic Transmission Fluid
on page 10-9.
Adaptive Shift Controls
The shift quality of a new vehicle
may not be ideal because the
Adaptive Shift Control process may
not have determined the best
settings for a particular shift or
condition. Shift quality will improve
with continued driving.
Low Traction Mode
Low Traction Mode aids in vehicle
acceleration on slippery road
surfaces such as ice or snow. By
selecting 2 (Second) using Range
Selection Mode while at a stop, the
transmission will limit torque to the
drive wheels to prevent slippage.
1-1