Oil pressure 'guage' going up and down while driving

Asked by Apr 19, 2012 at 07:52 PM about the 2005 Chevrolet TrailBlazer LT

Question type: Maintenance & Repair

I have a '05 Trailblazer with 175K miles on it and today while driving home the warning light came on to ck. the guages.  Looked over and noticed the Oil guage went from the average of 40 down to 0 and remained there for a couple of minutes.  Then it shot back up to 40 again and the warning light went back off.  It did this, that I noticed, about 5 times in a matter of just a couple of minutes.  Not sure if it means anything but the AC fan just an hour before this had stopped blowing almost completely.  Still blew cold but was blowing like  it was turned to '0' when it was turned to '5'.  Might just be a coinsidence but not sure....Any help would be greatly appreciated.  

1 Answer

315

ac fan not likely related. possible faulty blower motor or blower resistor assembly failure there. Dropping to 0 and back up is likely either an intermittent wiring problem in the oil sending unit or the sending unit itself. not likely to be engine related unless you hear bearing noises or have metal in your engine oil. also once oil pressure goes low mechanically it usually never comes back to normal.

8 of 8 people found this helpful.

Your Answer

Add photo

Related Questions

Search Chevrolet TrailBlazer Questions

Chevrolet TrailBlazer Experts

#1 Tom Demyan
Tom Demyan
Reputation 800
#2 bigdogracer
bigdogracer
Reputation 770
#3 dandyoun
dandyoun
Reputation 600
View All

Related Models For Sale

Used Chevrolet Tahoe
564 Great Deals out of 28,965 listings starting at $1,699
Used Jeep Grand Cherokee
1,046 Great Deals out of 74,668 listings starting at $750
Used GMC Envoy
67 Great Deals out of 2,132 listings starting at $1,995
Used Chevrolet Silverado 1500
1,683 Great Deals out of 174,972 listings starting at $1,250
Used Chevrolet TrailBlazer EXT
19 Great Deals out of 968 listings starting at $800
Used Ford Explorer
944 Great Deals out of 72,548 listings starting at $1,499
Used Dodge Charger
398 Great Deals out of 28,096 listings starting at $1,988
Used Chevrolet Impala
578 Great Deals out of 31,558 listings starting at $799
Used Chevrolet Blazer
4 Great Deals out of 1,169 listings starting at $500
Used Chevrolet Equinox
1,064 Great Deals out of 71,178 listings starting at $1,800
Used Dodge Durango
266 Great Deals out of 22,662 listings starting at $1,200
Used GMC Yukon
359 Great Deals out of 18,002 listings starting at $2,950
Used Ford F-150
2,178 Great Deals out of 206,277 listings starting at $1,499

Used Cars For Sale

2007 Chevrolet TrailBlazer LT For Sale
3 Great Deals out of 38 listings starting at $1,995
2005 Chevrolet TrailBlazer LT For Sale
26 listings starting at $3,295

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.