2008 Chevrolet Avalanche Problems
RepairPal has identified the most common problems with the 2008 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.
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.
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
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:
- Check engine light
- Reduced Power message
- OBD trouble code P2135
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.
The spark plugs should be replaced every 100,000 miles. Our technicians recommend replacing the spark plug wires also at this time.