One problem related to engine knocking noise has been reported for the 2002 Chevrolet Trailblazer. The most recently reported issues are listed below.
Engine slippage, then started making a knocking noise. We took it to a private mechanic that informed us of a recall notice by general motors on the cylinder sleeve and that the VIN of our 2002 Trailblazer fell within the parameters of the recall notice. We had the vehicle towed to the dealership, who informed us that the tie rod went through the engine block. We are in the process of having a new engine installed. General motors will only pay for 30% of the repairs even though the engine has been well cared for, has 60,000 miles on it and mechanics have stated that the cylinder sleeve may have contributed to the problem.