2008 avalanche 5.3 overheati g

Asked by Jun 08, 2019 at 11:43 AM about the 2008 Chevrolet Avalanche LT 4WD

Question type: Maintenance & Repair

New thermostat, water pump, temp sensor, radiator, cooling
fans. Still running 220 degrees at idle. No signs of moisture
in oil or smoke from exhaust. If i sit in park and rev to 3000
rpm, it goes back down to normal 210 before very slowly
increasing to 220 again

3 Answers

76,445

You might have replaced the fans, but there's still some failure in the fan system. When the car overheats, turn on the AC. Fans work by default with the AC. You probably have a blown fuse or relay, defective fan clutch or wiring, or a bad fan temperature switch.

1 people found this helpful.

Fans turn on as they should, both high and low speeds. Also replaced all 3 relays and fuses.

76,445

1. Did you install the thermostat correctly; it's possible to put it in backward. 2. You might have air in the cooling system that needs to be purged (see videos on line that show you how).

1 people found this helpful.

Your Answer:

Avalanche

Looking for a Used Avalanche in your area?

CarGurus has 124 nationwide Avalanche listings starting at $5,995.

Postal Code:

Chevrolet Avalanche Experts

  • #1
    sverden
    Reputation
    540
  • #2
    Markw1952
    Reputation
    390
  • #3
    GuruLW9BX
    Reputation
    290
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 1500
134 Great Deals out of 12,515 listings starting at $3,995
Used Chevrolet Tahoe
20 Great Deals out of 830 listings starting at $5,999
Used Cadillac Escalade EXT
12 listings starting at $5,995
Used Ford F-150
254 Great Deals out of 14,102 listings starting at $1,377
Used GMC Sierra 1500
93 Great Deals out of 11,037 listings starting at $3,000
Used Dodge Ram 1500
13 Great Deals out of 340 listings starting at $3,500
Used GMC Yukon
17 Great Deals out of 1,024 listings starting at $2,200
Used Chevrolet Suburban
11 Great Deals out of 470 listings starting at $8,888
Used Chevrolet Colorado
26 Great Deals out of 1,593 listings starting at $1,999
Used Cadillac Escalade
17 Great Deals out of 645 listings starting at $4,500
Used Toyota Tundra
21 Great Deals out of 1,067 listings starting at $1,751
Used Chevrolet Silverado 2500HD
43 Great Deals out of 1,436 listings starting at $4,495
Used Toyota Tacoma
34 Great Deals out of 1,672 listings starting at $5,500

Used Cars For Sale

2012 Chevrolet Avalanche LT 4WD For Sale
9 listings starting at $14,995
2011 Chevrolet Avalanche LT 4WD For Sale
13 listings starting at $9,995
2010 Chevrolet Avalanche LT 4WD For Sale
7 listings starting at $10,997

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. Content will be removed if CarGurus becomes aware that it violates our policies.