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Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10399647) - 2016 - crc - 5/25/16
148
Driving and Operating
Symptom
Cause
Corrective Action
Reference
Black exhaust smoke (Diesel)
Engine Control system
faulty
4
-
The air cleaner clogged
4
-
Fuel system faulty
4
-
Exhaust system clogged
4
-
Diesel particulate filter
(DPF) faulty
4
-
Engine is overheating
No engine coolant
Add engine coolant
See
Front of radiator is
clogged with dirt
Wash clean with tap
water
See
Radiator cap not
sufficiently tightened
Make sure it is firmly
tightened or replace the
radiator cap
-
Fan belt loose
Adjust the tension or
replace the belt
See
Engine coolant dirty
4
-
Fan clutch is faulty
4
-
Radiator cap dirty or
faulty
Clean or replace
-