Any time the Chevrolet Avalanche ignition wires exhibits physical damage either to the ignition wire or the boots, the Chevrolet Avalanche spark plug wires should be replaced as preventative maintenance.
Chevrolet Avalanche Copper and Platinum Spark Plugs by Bosch, Denso and NGK. Replace the Chevrolet Avalanche spark plugs once a year for optimum vehicle performance and increased fuel mileage.