One problem related to service engine light on has been reported for the 2003 Chevrolet Venture. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Chevrolet Venture based on all problems reported for the 2003 Venture.
Was on the interstate after driving approximately 1. 5 hours when service engine soon light appeared. When I slowed down to in-town speeds the van drove very rough and would often stall when at a stop light. Took it to gm shop to find out that the rocker arm post had pulled out of the cylinder head #4. Gm wanted to charge me over $2000 to repair. Instead the offered to repair with a "heli-coil" and gm picked up all charges. 10 months later driving again on the interstate went to pass another vehicle and the service engine soon light appeared again. Was able to get to a gm service shop. They found another rocker arm post had pulled out of a cylinder head #6. They did a "heli-coil" replacement again which I paid for. Both shops have said this should never happen during the lifetime of a vehicle, yet it happened twice in mine. In a car less than 5 years old no less. Is there a manufacturing defect in these engines to cause such a significant failure?.