In this article, we’ll discuss the top five issues often found in the second generation Chevy Avalanche. These problems can have a significant impact on the vehicle’s performance and reliability, so understanding them is crucial for owners and potential buyers.
1. Throttle Body Issues
One common problem with the Chevy Avalanche is related to the throttle body. The throttle body controls the airflow into the engine, and when its sensors fail, it can trigger warning lights on the dashboard, such as the engine-reduced power mode light or the check engine light. A specific diagnostic trouble code (DTC) associated with this issue is the P2135. Simply cleaning the throttle body will not solve this problem; the faulty sensors usually require a replacement. It’s recommended to also inspect the wiring and connector for any potential issues.
2. EVAP System Troubles
The Chevy Avalanche, like many GM vehicles, is prone to EVAP system problems. Starting with a check of the gas cap for tightness and signs of damage is a good initial step. Other components of the EVAP system, such as the purge valve and vent valve, may also contribute to issues like fuel vapor leaks. Ensuring the proper functioning of these parts can help mitigate potential problems.
3. AFM Lifters Malfunction
The active fuel management (AFM) lifters, responsible for enabling the vehicle’s transition between four-cylinder and eight-cylinder modes, can experience issues leading to rough engine performance and misfires. If these lifters fail and remain stuck, the engine’s functionality will be significantly impacted, often triggering a check engine light. Addressing this problem may involve internal engine component repairs.
4. Outside Door Handle Concerns
The exterior door handles on the Chevy Avalanche are prone to breakage near their pivot areas, primarily due to the weakness of the attached plastic. Caution should be exercised to avoid undue stress on these components during normal use. Similarly, the interior door handles may also encounter similar issues.
5. Fading Plastic Trim
Many Chevy Avalanche vehicles experience fading of plastic trim over time. While this is a common issue for various vehicles, it can detract from the overall aesthetics of the Avalanche. Fortunately, there are several methods to address this problem, such as using trim restorers, heat guns, or, surprisingly, even peanut butter. The fading is typically observed on specific areas of the vehicle, making it a manageable concern.
Given these common issues, it’s important for Chevy Avalanche owners to stay vigilant and address any emerging problems promptly. Despite these challenges, the Chevy Avalanche remains a popular and dependable vehicle.
What is the number one problem on the second generation Chevy Avalanche?
The number one problem is the throttle body. The sensors in the throttle body can fail, leading to engine-reduced power mode light or a check engine light. The code P2135 is associated with this issue, and cleaning the throttle body will not solve the problem. It usually requires replacing the throttle body.
What is the common issue with the EVAP system on the Chevy Avalanche?
The EVAP system can have issues, often starting with the gas cap being loose or cracking. The EVAP purge valve and vent valve are components that can also cause trouble and may require repair or replacement.
What are AFM lifters and what problems can they cause on the Chevy Avalanche?
AFM lifters, also known as the active fuel management lifters, can cause issues when they get stuck and fail to reopen, leading to a check engine light, rough engine operation, and misfiring.
What is a common problem with the outside door handles on the Chevy Avalanche?
The outside door handles, particularly near the pivot area, can break due to the weak plastic in that location. This applies to both the outside and inside door handles.
What is a common issue with the plastic trim on the Chevy Avalanche?
The plastic trim on the Chevy Avalanche is prone to fading. Various methods can be used to address this issue, such as using a heat gun, trim restorer, or even peanut butter.