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 MANUALSCHEVROLET1986C 10 P/U 2WD V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSFUEL - USE OF GASOLINE CONTAINING 15 PERCENT MTBE
1986 Chevrolet C 10 P/U 2WD V8-350 5.7L
Fuel - Use of Gasoline Containing 15 Percent MTBE
1986 Chevrolet C 10 P/U 2WD V8-350 5.7LSECTION Fuel - Use of Gasoline Containing 15 Percent MTBE
9218chevy02
Number: 89-268-08
Section: 0B
Date: October 1989
Corporate Bulletin No.: 930108
Subject:
USE OF GASOLINE CONTAINING 15 PERCENT MTBE
Model and Year:
ALL 1980-89 PASSENGER CARS AND LIGHT DUTY TRUCKS
TO: ALL CHEVROLET DEALERS
In August of the U.S. Environmental Protection Agency approved the use of methyltertiary-butyl ether (MTBE) in gasolines at concentrations of 15 percent or Prior to that time, the legal limit was 11 percent; Generai Motors owners manuals stated that the use of gasolines containing 11 percent or less MTBE should not adversely affect the operation of the vehicle and would be covered by the New Vehicle and Emission Control Systems Warranties. The use of 15 percent MTBE in gasoline should also not adversely affect the operation of 1989 and earlier model vehicles and therefore, will not void any warranties covering those vehicles. In the interest of contributing to cleaner air, General Motors recommends that all model year vehicles use such fuels whenever available. The 1990 and future owners manuals will reflect this position.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.