I have an '07 Impala LT, 3.5 V6 Flex-fuel. Last night started intermittent low oil pressure warning. I think it might be a failing oil pressure sensor. Has anyone experienced this. Oil level is fine , filter is tight , no leaks , 133,000 miles. Any thoughts TIA , Chris

 

Probably is sensor, however better safe have the oil pressure checked.

 

Kevinkpk , thanks for the response, Chris

 

Does anyone know the proper way to get at this sensor. I read to remove oil filter then sensor. Can't get at it from underneath. I managed to loosen it from above after removing exhaust heat shield and top motor mount. Just can't get my hand on it to remove it. I have a 27mm motorcycle axle wrench that I just barely was able to loosen it with. The problem is going to be getting the new one's threads started . I'm thinking the starter may have to come out. Any thoughts anyone? TIA Chris

 

Maybe this can help?

 

kevinkpk, thanks again. Unfortunately on my V6 the sensor/switch is down by the oil filter. The starter has to come out. Have a good day, Chris

 

OK, in case this helps someone , to change the oil pressure sender/sensor/switch on a 3.5 V6,( in a 2007 Impala) remove oil filter, remove starter, and voila there it is. 27 mm deep socket removes it. I wasted time trying to do it from above. Now I know. Also you will need a 3/8 universal on the end of a 6" extension to get at one of the starter bolts. There is a plastic inspection cover that comes off first. Two 15mm bolts on starter, three 10mm screws on inspection cover, 13 mm on cable connection to starter and one clip connection to solenoid. Inspection cover is 2 piece, only lower piece needs to come off. BTW, disconnect battery negative terminal first. Also I used a 1/2 " drive 27mm deep socket with a 1/2 to 3/8 adapter with handle . It fits better. Have fun, Chris

 

Thanks Chris for posting back, that will help someone in the future. Did this fix your issue?

 

kevinkpk, the new switch did the trick. I initially tried from underneath 'cuz I need to change radiator hoses also. But I had (am having) problems getting the splash pan doohickey off to gain access. I got all the plastic push rivet thingamagigs off except 3 recessed that can be seen thru the upper grill. What a PIA. Anyway I hope someone can use this info. Apparently it is common. So as I said, I went the starter removal route which is the proper way. Thanks for the interest. Chris

 

I'm just starting to have this light and warning issue on my '06 Impala. Thanks for the information. Based on the symptoms I figured it would be a pressure switch or sending unit of some sort.