Bulletin Information

Bulletin Title: #21-NA-143 - Coolant Leak/Smell - (Jul 14, 2021)
Bulletin Type: Technical
Applies To: Heating, Ventilation and Air Conditioning / Engine Heating and Cooling

#21-NA-143 - Coolant Leak/Smell - (Jul 14, 2021)

Subject:
Coolant Leak/Smell

Brand:

Model:

Model Year:

VIN:

Engine:

Transmission:

from

to

from

to

Chevrolet

Silverado 4500HD, 5500HD, and 6500 HD

2019

2021

L5D

Involved Region or Country

North America

Condition

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Document Tags

Document Title: #21-NA-143 - Coolant Leak/Smell - (Jul 14, 2021)

coolant

leak

engine

heater

outlet

tube

lower

bracket

cooling

system

install

clamp

remove

click

size

hose

pipe

bolt

upper

support

torque

labor

size remove

lower heater

outlet hose

hose clamp

clamp heater

outlet pipe

coolant leak smell

cooling system draining

system draining filling

click size remove

lower heater outlet

heater outlet hose

outlet hose clamp

hose clamp heater

clamp heater outlet

heater outlet pipe

size remove upper

upper heater outlet

upper pipe bolt