That means that the computer see's a problem with the emmission system are the transmission. Need to have engine scaned with a engine scanner to see what is going on.
A flashing check engine light is an indication of a misfire.
Oxygen sensor stuck lean.
In my 1998 Chevy Astro V-6 it is 4.5 quarts. check an owners manual.
try checking the fuel filter first.If that is not clogged check the fuel pressure...
A flashing check engine light usually indicates a misfire. You need to check codes to know possible causes.
Check your coil pack or the spark plugs.
check your fuelpump
Check the junk yards
Symptoms of a bad camshaft position sensor in a 2000 Chevy Astro can include poor engine performance, such as misfiring, rough idling, or stalling. You may also notice decreased fuel efficiency and difficulty starting the engine. Additionally, the check engine light may illuminate, and diagnostic trouble codes related to the camshaft position sensor may be triggered.
Go to ths site. It says you can not change the timimg on a 97 astro. as of now I am looking to do that to mine since it keeps misfiring. It states that the computer does the timing work. So if the ditributor cap is on wrong that causes it to misfire.http://www.justanswer.com/questions/27r9v-1997-chevy-astro-van-check
Check the air filter.
How do you reset check engine light for the 2009 Chevy trail blazer?