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Chevrolet Avalanche Problems

RepairPal has identified the most common problems with the Chevrolet Avalanche based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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9
Known Problems

The upper dash may crack, most commonly on vehicles in warm climates and exposed to a lot of sunlight. The common repair is to replace the upper instrument trim panel. Information on a technical service bulletin or extended warranty is not available at this time.

The keyless entry system may stop working. Our technicians tell us the key fobs and keyless entry receiver may need to be replaced to correct this fault.

The throttle position sensor (TPS) on the Chevrolet Avalanche, including the Black Diamond Edition, is notorious for failure which causes:

This issue is related to the throttle position sensor, and can be caused by faulty wiring to the TPS, bad connection at the TPS, or a failed TPS.

To correct this issue, the wiring harness, connector, and throttle position sensor must be inspected, tested, and/or replaced. The most common cause is a faulty TPS.

Our technicians highly recommend that the transmission is serviced every 30,000 miles to avoid problems and maintain optimal operating order.

The spark plugs should be replaced every 100,000 miles. Our technicians recommend replacing the spark plug wires also at this time.

Our technicians recommend flushing the brake fluid every 60,000 miles.  Brake fluid that is dirty may cause problems in the brake system.

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

Extended life coolant may become contaminated and require cooling system service before the recommended 100,000 miles.