Chevrolet Express 1500 - Problems, Statistics, and Analysis

Chevrolet Express 1500 owners have reported a total of 111 problems for their cars built in the
15 model years
listed in the chart below.
The chart shows the number of problems reported across all service years for each given model year of the Chevrolet Express 1500.
The 2003 Chevrolet Express 1500 cars have the most problems reported (18 problems).

Table 1. Total number of problems by model year for Chevrolet Express 1500

The following chart shows the 19 most common problems for Chevrolet Express 1500 cars.
The number one most common problem is related to the vehicle's air bags
(14 problems).
The second most common problem is related to the vehicle's service brakes, hydraulic (14 problems).

Table 2. Common problems of Chevrolet Express 1500

Compare Reliability Across Model Years Using PPMY Index

It would not be fair to compare the Chevrolet Express 1500 of an older model year to newer model years
since older vehicles have been in service longer and thus are expected to have more problems.
In order to compare the reliability across Express 1500 model years, we use the PPMY index which is defined as the
problems reported per thousand vehicles per Year.
A smaller PPMY index indicates greater reliability of the given model year cars.

PPMY = P / S / Y * 1000,

where P = total problems reported during the life of a Chevrolet Express 1500 model year;
S = total units sold of the model year; Y = years since the debut of the model year (the age of the vehicle).

The results are shown in Table 3.

Table 3. Use PPMY Index to Compare Reliability Across Express 1500 Model Years