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Chevrolet/GMC 2.8L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-13336155) - 2020 - CRC - 5/6/19
Driving and Operating
31
The exhaust brake only activates
when the transmission torque
converter is locked. This can vary
based on vehicle speed, gear,
and load.
To activate the system, press the
switch on the center stack.
Pickups
Vans
The exhaust brake is activated
when Tow/Haul Mode is activated.
See
“
Tow/Haul Mode
”
in the owner
’
s
manual.
A light comes on in the instrument
cluster when the exhaust brake and
Tow/Haul are activated. The switch
must be pressed at each vehicle
start for the system to be active.
Fuel
Top Tier Fuel
GM recommends the use of
TOP TIER Diesel Fuel to keep the
engine clean, reduce engine
deposits, and maintain optimal
vehicle performance. Look for the
TOP TIER Logo or see
www.toptiergas.com for a list of
TOP TIER Diesel Fuel marketers
and applicable countries.