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Fuel systemPart report

2003 Chevrolet Avalanche Fuel system Problems

Complaints
5about this part
Share
2%of 204 total for the year
Median mileage
105,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 5 complaints about the fuel system of the 2003 Chevrolet Avalanche, 2% of the 204 complaints for this model year. Where a mileage was given, the median is 105,000 miles. 1 recall campaign on record is filed under a similar system.

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.

“My speedo and fuel gauge either do not work or peg out in the instrument cluster. I never received the recall notice for my z71 Chevrolet Avalanche and Chevrolet is saying that they put a limit on the year and mileage. If I would have known it was a recall I would have taken in my vehicle to have it fixed for free. Chevrolet is saying I have to pay for this.... This is not right.”

NHTSA complaint #10493064, filed 2013-01, 84,900 miles

“The contact owns a 2003 Chevrolet Avalanche. The contact stated that an abnormal gasoline odor would enter the vehicle whenever the contact would drive over a road bump. The contact later noticed gasoline leaking from the vehicle. The vehicle had not been inspected by a dealer nor repaired. The manufacturer was not contacted. The failure mileage was approximately 105,000.”

NHTSA complaint #10452982, filed 2012-03, 105,000 miles

“Consumer was told that the 2003 Avalanche was not a standard tank and that the fuel leakage issues were not their responsibility. The consumer was told the gas tank had a manufacturers defect that caused it to be too thin around one of the seals. The tank was so thin, that it could be pressed as if it was soft rubber. The soft area had become so weak, that gas was leaking from the vehicle.”

NHTSA complaint #10151936, filed 2006-02

“2003 chevy Avalanche fuel tank began emitting a gas smell when the vehicle was more than half full. Over time small puddles of gas could be seen under the vehicle when it was stopped. The mechanic found that the tank had a manufacturer's defect, which caused it to be too thin around one of the seals. The tank was so thin in that area, that one could physically press it down like soft rubber. The soft area had been steadily weakening the seal until it finally failed causing gas to leak out of it.”

NHTSA complaint #10145374, filed 2005-12

Related recalls

Related service bulletins

Fuel system: other model years

YearComplaintsShare of year
201322%
201213%
201122%
200923%
200862%
200762%
200619%
2005913%
2004117%
200352%
2002153%

Other parts of the 2003 Chevrolet Avalanche

Brakes
81 complaints
Electrical system
42 complaints
Air bags
14 complaints
Transmission and drivetrain
14 complaints
Vehicle speed control
11 complaints
Visibility (wipers, defrost, mirrors)
10 complaints
Body and structure
9 complaints
Steering
8 complaints
Suspension
7 complaints
Tires
7 complaints
Engine cooling
6 complaints
Exterior lighting
6 complaints

← All problems reported for the 2003 Chevrolet Avalanche

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