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GM Releases Fix For Chevy Silverado Charge Air Cooler Icing Issue

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.

Affected vehicles: units of the 2019 through 2021 Chevy Silverado 1500 and 2022 Chevy Silverado 1500 Limited equipped with the turbocharged 2.7L I4 L3B gasoline engine.

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.

Contacts:

  • 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.

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Jonathan is an automotive journalist based out of Southern California. He loves anything and everything on four wheels.

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Comments

  1. Its too bad they don’t have some sort of a test facility to see if this will happen before they build millions of vehicles and then look like idiots when the vehicles they sell in cold climates freeze up.

    Hurry to market. Profit over customer concern, WELL MAYBE THEY WON’T FREEZE, WE ALREADY POCKETED THE MONEY FROM THE SALE. THE CUSTOMERS TIME ISN’T VALUABLE THEY CAN BRING IT IN AND WE WILL JURY RIG IT SOMEHOW

    No more new GM crap for me!

    Reply
    1. Fortunately they haven’t sold too many of the 4-cyl Silverados.

      Reply
      1. You two do realize that there are millions of more scenarios that happen in the real world they can’t rest for right? They try their best but particular circumstances might not have been reached or covered in testing.

        Take for example the straight 5 in the first gen Colorado. We has our starter ice up after driving from warmer rain in to hard freeze snow and ice conditions straight. The starter was on the cold side so the exhaust didn’t heat it up to melt. Well the water from all the rain eventually froze and over night thawing ended up fixing it. That would be a scenario not thought of or figured out in testing and was a very particular set of circumstances.

        Arm chair quarterbacks over here would have caught far less, give them a break. All manufacturers have issues like this they can’t catch. Maybe is something gets dented a particular way it changes a parameter and impacts an outcome not found in testing. You rarely see stuff like this happen and Ford had it far worse happening under far more normal circumstance.

        Reply
  2. I agree complitly GM just shoves their CRAP outthe door and hopes the public dosent figure it out …… I baught a brand new 1977 Corvette and the ORANGE PEAL in the paint was SO BAD every one I showed my NEW CAR to ASKED ME IF I HAD HAD IT REPAINTED….. THE car was a total DOG couldnt get out of its own way .

    Reply
  3. All vehicle brands were dogs back then. Federally mandated emissions regulations were in full swing . Engines were dogged down by pollution and smog control. 1977 standard 350 L48 was 180 horse power, optional L82 was only 210 horsepower. I owned a 1976 Monte Carlo 350 4 barrel that only had 165 horse. Not much HP to push that much weight down the road. Definitely not good days for performance vehicles no matter what brand you purchased.

    Reply

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