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

305

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 out of 8 people think this is helpful.

Your Answer

Add photo

Related Questions

Search Chevrolet TrailBlazer Questions

Chevrolet TrailBlazer Experts

#1 Tom Demyan
Tom Demyan
Reputation 760
#2 bigdogracer
bigdogracer
Reputation 670
#3 tennisshoes
tennisshoes
Reputation 570
View All

Related Models For Sale

Used Chevrolet Tahoe
772 Great Deals out of 28,452 listings starting at $1,500
Used Jeep Grand Cherokee
845 Great Deals out of 68,679 listings starting at $864
Used GMC Envoy
51 Great Deals out of 2,393 listings starting at $1,800
Used Chevrolet TrailBlazer EXT
11 Great Deals out of 1,333 listings starting at $2,900
Used Chevrolet Silverado 1500
2,290 Great Deals out of 155,163 listings starting at $1,395
Used Ford Explorer
936 Great Deals out of 73,995 listings starting at $750
Used Dodge Charger
357 Great Deals out of 29,619 listings starting at $2,475
Used Chevrolet Impala
793 Great Deals out of 34,384 listings starting at $799
Used Chevrolet Equinox
1,260 Great Deals out of 65,894 listings starting at $1,600
Used Dodge Durango
299 Great Deals out of 24,115 listings starting at $1,500
Used Chevrolet Blazer
1,343 listings starting at $1,995
Used Ford F-150
2,690 Great Deals out of 212,354 listings starting at $1,000
Used GMC Yukon
518 Great Deals out of 17,126 listings starting at $1,799