Some GMC Canyon and GMC Sierra 1500 owners may notice less-than-ideal performance from their cabin heater, in particular with models equipped with the 2.7L I4 L3B gasoline TurboMax engine.

Some Chevy Colorado and Chevy Silverado owners with the TurboMax 2.7L ... It’s heater is hot and fast…. Reply ocnblu. February 27, 2025 at 6:21 PM . Well here we go, they’re in hot water ...