Chevrolet Low Cab Forward 2016 Manual page 147

146 Driving and Operating
Symptom
Unsteady engine speed (Diesel)
Unsteady engine speed (Gasoline)
Cause
There is water or air in
the fuel system
Fuel system is faulty
Fuel system is faulty
Ignition system is faulty
Engine control (electrical
system) is faulty
Corrective Action
Drain water from fuel
filter or bleed the system
Reference
See Running Out
of Fuel (Diesel)
0 231 or Water in
Fuel (Diesel) 0 229
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