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 DIAGNOSISPOWERTRAIN MANAGEMENTTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSFUEL SYSTEM - CONTROLLED IDLE SPEED UPDATED CHART
1990 Chevrolet Lumina APV V6-191 3.1L
Fuel System - Controlled Idle Speed Updated Chart
1990 Chevrolet Lumina APV V6-191 3.1LSECTION Fuel System - Controlled Idle Speed Updated Chart
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Number: 90-2O6-6C
Section: 6C
Date: April 1990
Corporate Bulletin: 036504
Subject:
CONTROLLED IDLE SPEED UPDATED CHART
Model and Year:
1990 ALL TRUCKS (EXCEPT TRACKER)
TO: ALL CHEVROLET DEALERS
This bulletin updates the chart shown on Page 4-43 in the Fuel Control Section of the 1990 Shop Manual. This information is for all 1990 Light-duty trucks (except Tracker) with gas engines.
1990 CONTROLLED IDLE SPEED
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.