Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1990LUMINA APV V6-191 3.1LREPAIR AND DIAGNOSISTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSFUEL SYSTEM - FUEL INJECTOR MAINTENANCE CLEANING
1990 Chevrolet Lumina APV V6-191 3.1L
Fuel System - Fuel Injector Maintenance Cleaning
1990 Chevrolet Lumina APV V6-191 3.1LSECTION Fuel System - Fuel Injector Maintenance Cleaning
INFORMATION
Bulletin No.: 04-06-04-051C
Date: April 19, 2012
Subject: Maintenance Cleaning of Fuel Injectors
Models:
2013 and Prior GM Passenger Cars and Trucks
Supercede:
This bulletin is being revised to add model years and Parts Information. Please discard Corporate Bulletin Number 04-06-04-051B (Section 06 - Engine/Propulsion System).
General Motors is aware that some companies are marketing tools, equipment
and programs to support fuel injector cleaning as a preventative
maintenance procedure. General Motors does not endorse, support or acknowledge the need for fuel injector cleaning as a preventative maintenance procedure. Fuel injector cleaning is approved only when performed as directed by a published GM driveability or DTC diagnostic service procedure.
Due to variation in fuel quality in different areas of the country, the only preventative maintenance currently endorsed by GM regarding its gasoline engine fuel systems is the addition of GM Fuel System Treatment PLUS added to a tank of fuel at each oil change.
Parts Information
Disclaimer
Bulletin No.: 04-06-04-051C
Date: April 19, 2012
Subject: Maintenance Cleaning of Fuel Injectors
Models:
2013 and Prior GM Passenger Cars and Trucks
Supercede:
This bulletin is being revised to add model years and Parts Information. Please discard Corporate Bulletin Number 04-06-04-051B (Section 06 - Engine/Propulsion System).
General Motors is aware that some companies are marketing tools, equipment
and programs to support fuel injector cleaning as a preventative
maintenance procedure. General Motors does not endorse, support or acknowledge the need for fuel injector cleaning as a preventative maintenance procedure. Fuel injector cleaning is approved only when performed as directed by a published GM driveability or DTC diagnostic service procedure.
Due to variation in fuel quality in different areas of the country, the only preventative maintenance currently endorsed by GM regarding its gasoline engine fuel systems is the addition of GM Fuel System Treatment PLUS added to a tank of fuel at each oil change.
Parts Information
Disclaimer
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.