GM has released a new service update for the Chevy Silverado 1500 related to an issue wherein the pickup’s charge air cooler can accumulate ice. The issue can occur when driving in extremely cold weather.
The problem: certain units of the Chevy Silverado 1500 may exhibit a condition wherein sludge or ice accumulates in the Charge Air Cooler (CAC) or closed Crankcase Ventilation (CCV) system. This condition will occur when driving in extremely cold weather, or rather, temperatures of 0 degrees Fahrenheit and below.
The hazards: if ice or sludge accumulates in the Chevy Silverado 1500 CAC or CCV system, it may affect the engine, leading to a number of different conditions. These include decreased engine performance, incorrect boost levels, or possibly an oil leak. This condition may also trigger any number of Diagnostic Trouble Codes (DTCs).
The fix: to address the icing issue, GM has instructed technicians to install a radiator air front lower baffle on affected pickups, and, if needed, reprogram the vehicle’s Engine Control Module (ECM) as well.
Affected components: turbocharged 2.7L I4 L3B gasoline engine, specifically the CAC or CCV system.
Number of affected vehicles: it’s estimated that 66 vehicles may be affected by this issue. That said, those 66 vehicles also include units of the GMC Sierra 1500.
Owners should: owners can contact Chevrolet directly with any concerns they may have using the contact information listed below.
- GM Service Update number: N222372592
- Chevrolet U.S. Customer Service: 1-800-222-1020
To note, this service update also applies to certain units of the GMC Sierra 1500, per previous GM Authority coverage. Additionally, it should be noted that GM has issued a service update for a similar issue affecting units of the Buick Encore, GMC Terrain, and various Chevy models, which can also may see an accumulation of ice or sludge in the CAC or CCV system when driving in extremely cold temperatures. Check out our previous coverage for more information.