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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 28, 2023
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2020 Chevrolet Blazer RS 3.6L MIL Lamp on VIN: 3GNKBERS4L
The original problem was the temperature gauge would read cold at all times and the ac was inoperative. The fans did not run at all times. The thermostat was replaced. The coolant temperature sensor was also replaced. The original concern was fixed a... Trouble codes: P0300 (Random misfire), P0300 (Random misfire), P0300 (Random misfire)

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2007 GMC Envoy SLE 4.2L HVAC Mode VIN: 1GKDT13SX7
Again, thanks for the replies! It turned out to be the lower mode actuator. The defrost (upper left) was working fine. Replaced the lower left, did a re-learn and all was well. Thanks again!
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