Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.

Print this page


really awful
Typical Repair Cost:
No data
Average Mileage:
150,000 miles
Total Complaints:
1 complaints

Most Common Solutions:

  1. not sure (1 reports)
2004 Chevrolet Avalanche cooling system problems

cooling system problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2004 Chevrolet Avalanche:

Unsubscribe any time. We don't sell/share your email.

2004 Chevrolet Avalanche Owner Comments

problem #1

Apr 222015

Avalanche Z71 5.3L V

  • Automatic transmission
  • 150,000 miles


Have maintained vehicle meticulously hence why I have over 150000 miles. However I'm now dealing with an issue that for now seems to be unresolvable. One day going to work, while on the highway, I noticed the engine temperature fluctuate after turning on the heat. Fearing a breakdown, I immediately got off the expressway and "limped" over to Chevy dealer.

Chevy dealer kept my vehicle for two days. Was unable to find leak in cooling system after placing dye in system. Did notice that coolant fluid was low by a gallon. They topped it off. They test drove my vehicle for 20 miles, issue "seemed" to be fixed. Yes, I had cooling system flushed/replaced at 100000 miles. Well, 2 weeks later, it was another cold morning while traveling to work, I turned the heat on and my engine temperature gauge started rising again! After work I checked the coolant level, I'm a gallon low again! I immediately purchased 50/50 Prestone Dex-Cool Extended Life Antifreeze/Coolant and topped it off again. Where is my coolant going??

- , Chicago, IL, USA

Search for these popular complaint phrases...

Not what you are looking for?