After I put a load in my trailor I go approx. 15 miles then the "service engine soon" light comes on steady and stays on. I turn off the engine unload my load, I start the truck up the light is out,It does it everytime. When I go a distance with the trailor empty the light does not come on at all.
check engine soon light stays on when pulling a trailer on 1990 Chevrolet 1500 Pickup
by semperfi in Roseville, CA on June 27, 2010
ANSWER by patrick mannion on June 27, 2010
Once the Check Engine Light has come on a code is stored in the computer it would be interesting to know what code is stored to see if it relevant and worth "fixing".