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Visually inspect CNG fill receptacle for a
damaged or missing O-ring. (2)

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Visually inspect all CNG hoses and lines for leaks
or damage. (2)

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Inspect the manual shutoff valve and connections
for damage or leaks. (2)

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Maintenance Schedule
Additional Required
Services (1)

Drain high pressure filter. (3)
Replace high pressure filter element. (4)
Visually inspect CNG tank shields for damage or
contact to fuel tank(s). (5)
Visually inspect fuel tank valves for leaks or
damage. (5)
Visual inspection of CNG tank(s) by certified
inspector for damage and deterioration. (5)

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Footnotes — Maintenance
Schedule Additional Required
Services
(1) Continue with the specified
maintenance intervals for the life of
the vehicle.
(2) Or every 12 months, whichever
comes first.
(3) Or every 24 months, whichever
comes first.
(4) Or every 36 months, whichever
comes first.
(5) Every 36 months or 58 000 km/
36,000 mi, whichever comes first.
See instructions on fuel container
for inspection and service life.

Amendment to the 2015 - 2016 Chevrolet Impala Bi-Fuel (Gasoline/CNG) Supplement
This information replaces the
Maintenance Schedule subsection
in the Service and Maintenance
section of the Gasoline/Compressed
Natural Gas Supplement to your
Owner Manual.

Maintenance Schedule
This CNG vehicle requires special
maintenance that is in addition to
the routine maintenance provided in
the owner manual, such as fluids,
filters, etc. The CNG system
components require periodic visual
inspections and maintenance by a
CSA International-certified inspector
or authorized GM dealer—see your
dealer or http://www.csagroup.org/.

{ Warning

{ Warning

Do not operate the vehicle
without CNG tank shields in
place. Operation with a CNG tank
shield removed may result in tank
damage that could result in a
rupture or possible explosion of
the tank. You or others could be
injured or even killed. If you must
remove a tank shield for any
reason, e.g., tank inspection or
vehicle repair, always reinstall the
shield before operating the
vehicle.

Keeping a CNG fuel tank in
service after the tank service
expiration date is dangerous. The
tank may no longer withstand the
CNG fuel system operating
pressure. You could be severely
injured or killed. Take the vehicle
to an authorized GM dealer to
have the tank replaced.

Have required services performed
by your GM dealer or other qualified
repair facility. Your dealer has the
necessary training and parts to
repair the vehicle.

©

2016 General Motors LLC. All Rights Reserved.

2

{ Warning
The CNG fuel system and tank(s)
must be inspected by a certified
inspector if the vehicle is involved
in a motor vehicle accident or fire
or if the system is leaking,
corroded or otherwise damaged
in any way. Have the tank
inspected if it emits an odor or
hissing sound.

The CNG fuel tank(s) must be
replaced 15 years after
manufacture. The expiration date of
the fuel tank(s) and instructions for
inspections are on a label on the
fuel tank and on a label in the fill
area. Have an authorized GM dealer
replace the fuel tank. Do not reuse
old fuel tank.

1 2 0 0 0 k m /7,5 0 0 m i

2 4 0 0 0 k m /1 5,0 0 0 m i

3 6 0 0 0 k m /2 2,5 0 0 m i

4 8 0 0 0 k m /3 0,0 0 0 m i

6 0 0 0 0 k m /3 7,5 0 0 m i

7 2 0 0 0 k m /4 5,0 0 0 m i

8 4 0 0 0 k m /5 2,5 0 0 m i

9 6 0 0 0 k m /6 0,0 0 0 m i

1 0 8 0 0 0 k m /6 7 ,5 0 0 m i

1 2 0 0 0 0 k m /7 5 ,0 0 0 m i

1 3 2 0 0 0 k m /8 2 ,5 0 0 m i

1 4 4 0 0 0 k m /9 0 ,0 0 0 m i

1 5 6 0 0 0 k m /9 7 ,5 0 0 m i

1 6 8 0 0 0 k m /1 0 5 ,0 0 0 m i

1 8 0 0 0 0 k m /11 2,5 0 0 m i

1 9 2 0 0 0 k m /1 2 0 ,0 0 0 m i

2 0 4 0 0 0 k m /1 2 7 ,5 0 0 m i

2 1 6 0 0 0 k m /1 3 5 ,0 0 0 m i

2 2 8 0 0 0 k m /1 4 2 ,5 0 0 m i

2 4 0 0 0 0 k m /1 5 0 ,0 0 0 m i

3

Visually inspect each CNG connection for
leaks. (2)

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Visually inspect CNG fill receptacle for a
damaged or missing O-ring. (2)

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Visually inspect all CNG hoses and lines for leaks
or damage. (2)

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Inspect the manual shutoff valve and connections
for damage or leaks. (2)

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Maintenance Schedule
Additional Required
Services (1)

Spark plug replacement and spark plug wire
inspection.
Drain the low pressure oil separator. (3)
Replace high pressure filter element. (4)
Visually inspect CNG tank shields for damage or
contact to fuel tank(s). (5)
Visually inspect fuel tank valves for leaks or
damage. (5)
Visual inspection of CNG tank(s) by certified
inspector for damage and deterioration. (5)

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Footnotes — Maintenance
Schedule Additional Required
Services
(1) Continue with the specified
maintenance intervals for the life of
the vehicle.
(2) Or every 12 months, whichever
comes first.
(3) Or every 36 months, whichever
comes first.
(4) Every 24 months or 17 500 km/
11,000 mi, whichever comes first.
(5) Every 36 months or 58 000 km/
36,000 mi, whichever comes first.
See instructions on fuel container
for inspection and service life.