Just put about $800 in my truck 2 months ago. Its a '98 k1500 4x4 with 135k miles. Tuneup done recently. I had tried to pass a slow moving vehicle this past weekend and had to gun it. power seemed down because I couldnt pass the vehicle LOL. Moments later I notice the service engine light on but its running fine. What could it be now? and whats the differance with the check and service engine lights and could the passing attempt have caused something to fail?