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

63,115

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.

63,115

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 128 nationwide Avalanche listings starting at $4,200.

Postal Code:

Chevrolet Avalanche Experts

  • #1
    sverden
    Reputation
    380
  • #2
    Markw1952
    Reputation
    350
  • #3
    F_O_R
    Reputation
    270
View All

Find great deals from top-rated dealersTM

Search

Related Models For Sale

Used Chevrolet Silverado 1500
86 Great Deals out of 14,752 listings starting at $1,995
Used Chevrolet Tahoe
23 Great Deals out of 1,069 listings starting at $4,999
Used Ford F-150
124 Great Deals out of 14,250 listings starting at $2,000
Used GMC Sierra 1500
64 Great Deals out of 13,277 listings starting at $3,995
Used Cadillac Escalade EXT
12 listings starting at $16,995
Used Dodge Ram 1500
12 Great Deals out of 368 listings starting at $4,995
Used Chevrolet Colorado
16 Great Deals out of 2,178 listings starting at $4,300
Used Cadillac Escalade
13 Great Deals out of 760 listings starting at $5,750
Used Chevrolet Suburban
9 Great Deals out of 589 listings starting at $7,275
Used GMC Yukon
20 Great Deals out of 1,303 listings starting at $2,500
Used Toyota Tundra
21 Great Deals out of 766 listings starting at $6,995
Used Toyota Tacoma
27 Great Deals out of 1,225 listings starting at $3,995
Used Chevrolet Silverado 2500HD
25 Great Deals out of 1,678 listings starting at $4,995

Used Cars For Sale

2012 Chevrolet Avalanche LT 4WD For Sale
7 listings starting at $10,990
2011 Chevrolet Avalanche LT 4WD For Sale
13 listings starting at $10,495
2010 Chevrolet Avalanche LT 4WD For Sale
6 listings starting at $8,999

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.