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0.035 inches.
.045
Place something to catch the engine coolant beneath your 1990 Chevy Corsica radiator. Remove the radiator drain plug with a 9/16 ratchet. The engine coolant will drain out.
.035
.045"
Need to know what size engine.
To give you an accurate answer we need to know which engine your car has.
ALLDATA.COM http://autorepair.about.com/library/firing_orders/bl-chevrolet-firing-95.htm
Depending on the type of plug, the gap for a 1990 Chevy 2500 pickup is between .045 and .060. The plugs should come pre gapped.
Spark plug gap chevy ls blazer
There is no spark plug cap located on the 1993 Chevy Blazer. The spark plug gap for this vehicle varies depending on the type of spark plug that is used. The OEM spark plug gap for this year is 0.040.