2003 Chevrolet Avalanche 1500 Engine cooling Problems
- Complaints
- 2about this part
- Share
- 1%of 182 total for the year
- Median mileage
- 70,782miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the engine cooling of the 2003 Chevrolet Avalanche 1500, 1% of the 182 complaints for this model year. Where a mileage was given, the median is 70,782 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“First of all my vehicle is a 2003 chevy. Avalanche, well maintained and only has 62,000 miles. To get started, I was driving down the street when I heard this banging noise, so I pulled into the nearest gmc dealership. They checked the engine out and found out there was absolutely no fluid going into the engine. We were told we needed a new engine so I authorized them to put a new one in. The service manager and a couple of tech's looked at the engine and agreed it was a defect. …”
NHTSA complaint #10209971, filed 2007-11, 62,000 miles“Since purchasing this truck on 02/01/2007, there have been multiple problems with the transmission, engine, and electrical system that have not gotten resolved, however they do seem to get worse. The worst of these problems has occurred while driving on the northeast extension of the pennsylvania turnpike. While attempting to pass another vehicle in the left lane the engine shut off . I was doing approx. 60-65 MPH when this occurred during the am rush hour. After losing engine power I somehow made it safely to the right hand shoulder and let the truck coast to a stop. …”
NHTSA complaint #10207705, filed 2007-11, 79,565 milesRelated service bulletins
- 10251887Mar 14, 2024This bulletin advises the technician of possible location of an internal coolant leak from a specific cylinder head and location.
- 10251890Mar 13, 2024This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank…
- 10250775Feb 22, 2024This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large…
- 10249579Jan 12, 2024This PI bulletin advises the technician on the proper way to install the pistons in an engine.
- 10242843Sep 1, 2023The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the…
- 10242262Aug 24, 2023This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and…
- 10240344Jul 31, 2023This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
- 10236164Apr 24, 2023This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308…
- 10235802Apr 24, 2023This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue.
- 10234141Mar 23, 2023This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue.
Engine cooling: other model years
Other parts of the 2003 Chevrolet Avalanche 1500
84 complaintsBrakes
53 complaintsAir bags
12 complaintsVehicle speed control
11 complaintsSteering
9 complaintsBody and structure
8 complaintsOther or unknown
7 complaintsVisibility (wipers, defrost, mirrors)
5 complaintsFuel system
4 complaintsSuspension
4 complaintsTransmission and drivetrain
4 complaintsEngine
3 complaints
← All problems reported for the 2003 Chevrolet Avalanche 1500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology