Check engine soon light came on. went in for oil change and test said egr valve. had oil changed and was told this may fix the problem. 2 weeks later check engine soon light is on again. should i have egr valve replaced?

pls. drive

Well in my Advice please check connecters grips might be they have some carrageen in front of engine & bay & near that EGR valve might be some grip lose or broken just replace it or tight it , well yes you can wash EGR valve with petrol or you can use anti rust spray(WD-40 or carby cleaner) ...hopfully you ll fix your car best of luck.....

well I'm a mechanic and you just told me what's wrong....
now all you have to do to fix it is test all parts listed replace the one (s) that fail test....

The labor sounds like it is in line with the standard labor guide if your Trailblazer is a 4X4. I can only guess how the repair went from oil change to intake valve. Was the "Check Engine" or "Service Engine Soon" Light on when you took it in? Did they tell you that your engine has a misfire that will require the replacement of a valve to fix? If so, this sounds reasonable. Otherwise, I don't know what to tell you without knowing all the details.

He's right both and the code is the EGR valve. The car won't run with the EGR valve removed but it may be disabled some way. Most of the time EGR vales leak or the senser line stopps up. There's a small medal ine coming up the the EGR senser from the exhaust and connects to the senser this line stops up and the senser knows something aught to be happing and it doesn't so it turns the light on. Your mechanic is right it's not hurting anything but it makes the light on. It can be fixed but it'll not run much different.

probley not egr valve it probley egr control solenoid or wiring

if it is the check engine soon light,it is only a sensor telling you your van is not running 100% on fuel economy or pollution standards have dropped .no big deal you can fix it when ever.

check engine light has nothing to do with oil level. Only the red engine light does. It sounds like you are burning a lot of oil and it is poisoning your catalytic converter. Your converter is killing itself trying to treat all the unburned oil that is coming to it. It will get so hot that it swells inside and clogs it up. Why you are burning oil is the question. Only 3 possibilities. Past the piston rings, past the valve stem seals or a plugged pvc valve and its hoses. Clean the PVC hose and change the PCV first. Changing the cats now will just kill them again until you fix the oil burning.
Autozone will do free scan test for fault codes by the way.
PCV won't show up there though.
You can buy cheap engine on ebay or at car-part.com. page with asterisk is lowest price.

if the needle is on or around the letter N then thats normal. you can also change the oil sending unit. as far as the engine light once you change the EGR valve and the EPT sensor the engine light should go off

COULD BE A VACUUM LEAK TAKE PROPANE TORCH AND LEAVE OFF PUT AROUND ALL VACUUM POINT WHERE YOU SUSPECT COULD POSSIBLY LEAK ENGINE SPEEDS UP THAT'S IT WORTH A SHOT BEFORE SPENDING MORE CASH