One problem related to service engine light on has been reported for the 1999 Chevrolet Astro. The most recently reported issues are listed below.
Service engine soon light illuminated and rough running engine, dealer states problem is with the fuel injector, however this will be consumer's fourth time to the dealer for the same problem, the dealer uses injector treatment/cleaner as stated in service bulletin (00-06-04-003). Possibly engine related.