check engine light came on 6.o vortec engine vin code u using 87 octane gas .previously using 89 octane would this set off check engine light?

Asked by Feb 05, 2012 at 08:42 PM about the 2005 Chevrolet Silverado 2500HD 4 Dr Work Truck Crew Cab SB HD

Question type: Maintenance & Repair

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leaking intake manifold gasket set maf sensor on accelaration

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