Question about 2004 Chevrolet Impala
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Posted on Jan 02, 2017
SOURCE: 2002 Chevy Impala Sensor # 3
You didn't give the engine size, so I'll give what my manual shows.
The 3.4L engine----- 2nd one in from the left, in back of the engine.
The 3.8L engine------2nd one in from the left, in front of the engine.
Posted on Mar 12, 2009
SOURCE: What does a major tune
New spark plugs, oil and oil filter, transmission flush and fill, fuel filter, air filter, coolant flush and fill, clean throttle body plate and bore, clean the MAF sensor, replace any loose or cracked vacuum lines, PCV valve, new air filter, new battery.
99% of the time all you should ever need for a tune up is new spark plugs, and a clean air filter and throttle body. But since your inquiry indicated "major" I gave it more critical thought.
Posted on Feb 18, 2011
When it doesn't start, is the security light and maybe the battery light flashing?
If yes, it's probably the PassLock security system. I just bypassed mine on my 2002 Impala. There are several websites with information and possible solutions; including spending several hundred dollars at the dealer, to a do-it-yourself bypass for a couple dollars.
The best source of information I could find was:
There is lots of good information there.
If you want to see my writeup on bypassing the PassLock on my Impala, you may have to register at http://www.naioa.com and go to:
Posted on Jun 30, 2011
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