Strange probelems here...

Asked by Sep 06, 2017 at 09:15 PM about the 2005 Chevrolet Avalanche Z71 4WD

Question type: Maintenance & Repair

Alright, so long story short, I went threw a little flood water
during Harvey. Maybe a little deeper than I should, up to
the top of the tires if not a little over for a few seconds. I
drive a 2005 Z71 chevy avalanche. Couple days later my
cooling fans start kicking on when the truck is off and stay
on all night, killing the battery and then after a charge the
engine light comes on. I run the codes, get back a PO-
327,332,&480. Couple knock sensors and a cooling fan
sensor issue. I pull the fuse for the cooling fan out so
battery doesn't die at night or while at work but I put it
back in when I drive. I do that for a day, get home from
work. Then I get out to the truck and my remote key isn't
working(battery is fine I checked the one in that one too),
go to start it and it won't start. It turns over, it starts to
fire..and then dies. Not getting any codes out of the truck
now and the front doors no longer have any electronic
functions(door lock,windows, mirrors) but the back doors
can still roll their windows down. Really confused...

5 Answers


Have you checked fuses?

Checked fuses, all are good. I also put 10g of gas in and the fuel gauge says empty. The truck was nearly empty, but never got a low fuel warning while coming home.


I suppose you could trace out the wiring loom and find all the plugs and unplug them and dry them out. Clearly you have moisture in the system and if it stays there you will have corrosion too. No easy way out of this one. Use contact cleaner to clean the connections and dielectric grease to help keep moisture out the next time.

Well I'm hoping that isn't the main issue, hopefully can narrow it down to something minor. New I should have lifted this truck sooner, all these damn floods here in Houston. Rains hard for an hour or two and then your stuck for an hour or two....or 6..

Thank you for your help though.

Your Answer


Looking for a Used Avalanche in your area?

CarGurus has 182 nationwide Avalanche listings starting at $2,000.

Postal Code:

Chevrolet Avalanche Experts

  • #1
    Tom Demyan
  • #2
    David Scott
  • #3
    Oscar Leon
View All

Related Models For Sale

Used Chevrolet Silverado 1500
179 Great Deals out of 9,745 listings starting at $1,700
Used Ford F-150
594 Great Deals out of 10,665 listings starting at $3,000
Used Chevrolet Tahoe
6 Great Deals out of 750 listings starting at $3,995
Used Cadillac Escalade EXT
14 listings starting at $9,500
Used GMC Sierra 1500
234 Great Deals out of 9,999 listings starting at $399
Used Dodge Ram 1500
45 Great Deals out of 500 listings starting at $3,488
Used Chevrolet Colorado
16 Great Deals out of 1,805 listings starting at $1,999
Used Cadillac Escalade
5 Great Deals out of 466 listings starting at $4,980
Used Toyota Tundra
42 Great Deals out of 1,220 listings starting at $2,500
Used Toyota Tacoma
37 Great Deals out of 1,024 listings starting at $7,950
Used GMC Yukon
10 Great Deals out of 898 listings starting at $2,500
Used Chevrolet Suburban
517 listings starting at $9,995
Used Chevrolet Silverado 2500HD
9 Great Deals out of 1,159 listings starting at $4,995
Used Dodge Charger
75 Great Deals out of 775 listings starting at $2,000

Used Cars For Sale

2013 Chevrolet Avalanche For Sale
33 listings starting at $26,495
2012 Chevrolet Avalanche For Sale
23 listings starting at $15,978
2011 Chevrolet Avalanche For Sale
27 listings starting at $14,883
2010 Chevrolet Avalanche For Sale
16 listings starting at $11,995
2009 Chevrolet Avalanche For Sale
11 listings starting at $10,990

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.