How to turn off Check engine light on 1989 c1500 pickup w/ 4.3L gas engine, 4spd manual trans.
Optional Information:
1989 Chevrolet C1500 4.3L
Already Tried:
Truck just out of shop with tuneup and smog check (passed). 188,000 miles. New plugs, wires, air filter, rotor, cap. Check engine light turned on first drive since tureup.