sometimes it won't start on 2000 Chevrolet Impala

it has 149000 miles. at not any givein time it won't start. wait 15 min. it will start right up just like it didn't have any trouble. never know when it will do it. chevy dealers don't know whats cause it to do that. its been doing this for about a year. hope you can help thanks lucas

by in Choctaw, OK on April 01, 2009
5 answers
ANSWER by on April 03, 2009
You may have a faulty theft sensor in your ignition lock cylinder. If this is the case there should be a fault code stored in the Body Control Module. If the theft system is at fault the most common repair is to replace the ignition lock cylinder.
ANSWER by on April 11, 2010
I have an '02 Chevy Impala 3.8 V6 w/ 68K. I've had this happen about 5 times in the past 3 years. when it happens, it sounds like it's trying to start, but shuts down. Normally, we let it sit like you said about 10-15 minutes and then it starts right up. We notice the times it does happen is when we turn off the car for a quick stop like less than 10 minutes. Today,it happened again but this time it would not start, so we let it sit for about 3 hours. When we went back to start it, it was worse; you could tell it was not getting any gas. We decided to check to see if the fuel pump was working; so we took the gas cap off, turned the key to on, to listen to the whine of the fuel pump coming on which it did. After putting the gas cap back on we decided to try it one more time, and (unbelievably) it started right up. My brother who knows a lot about cars told us it might be a bad gas cap...something about causing a vacuum in the tank. he also said it theses problems are hard to diagnose and fix because they happen intermittently. Our dealership told us the same thing when we described the problem to them. This might not solve your problem but it is one more thing to check the next time it doesn't start.
ANSWER by on June 18, 2010
if car is sitting or driving up hill some not car dies or wont start
ANSWER by on March 16, 2011
BElieve it or not i found the answer n another website and trying it today. Take the lock cydinder apart and clean the two little tin contacts and add dieletric grease and it should sovle the proble. The tins have corrudted
ANSWER by on May 05, 2011
I had the same problem on my 2001 impala. It was a bad Body Control Module. It looked like someone had held the BCM "which is a circuit board" over a flame. It's a fairly expensive repair.
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