Engine Cooling System Problems of GMC Canyon

Vehicle sets an "ac off" fault message frequently. When this occurs, the temperature gauge goes to zero and the ac does not work. The truck is not overheating and no other faults are set. No trouble codes are found during scan. After some time (20-50 miles of travel), the fault disappears and the temperature gauge and ac begin working again. There are literally 1,000's of messages on discussion boards about this problem on numerous websites on different gm vehicles. People have changed one, some, or all components of their cooling system to no avail. The problem sometimes goes away for a few hours or a few months, but always seems to return. I had my vehicle to the gm dealership in may 2016 and the condition was unable to be duplicated at that time. I paid the dealership to do a complete servicing and inspection of the entire vehicle, which included the cooling system. No anomalies were found by the dealership. Since the problem continued, I replaced the coolant temperature sensor hoping it was a just a bad sensor/connector problem. This has not changed the condition in any way. My concern is that this is possibly an issue related to the actual placement of the temperature sensor. I'll explain with the following scenario: once the engine comes up to operating temp, the thermostat opens, and when the coolant begins to circulate, the temp sensor is left exposed, the temp gauge tanks, and the system kicks into a safe mode. While this is a great system safe response, I am prevented me from seeing a real overheat condition. I personally live and work in the mojave desert. In an environment where temperatures are commonly above 100 deg f, a properly operating vehicle cooling system can mean the difference between life and death. I can't be entirely sure if my coolant system really has a problem or is just giving false indications at this point.

See all problems of the 2008 GMC Canyon 🔎.

Over fused dash wiring, causing connectors to melt and resistors to blow in a/c and heat fan control system on a truck with only 10,000 miles ! causing a source for fire and toxic gas in cabin! this required a connector and a resistor to be replaced, at a cost of $306. 13, but GMC did not lower the fused rating in truck.

See all problems of the 2007 GMC Canyon 🔎.

The contact owns a 2006 GMC Canyon. While driving at various speeds, the engine stalled without warning. The vehicle restarted and the check engine warning indicator illuminated. The failure recurred numerous times. After the vehicle was shifted into the park position and the key was turned to the off position, the engine was still running. The failure recurred twice. The vehicle was taken to a dealer, where it was diagnosed that there was nothing wrong with the vehicle besides regular wear and tear. The vehicle was later taken to an independent mechanic, where it was diagnosed that the timing kit failed, water pump failed, intake manifold gasket and valve cover gasket failed, coolant needed to be flushed, fuel injection needed to be flushed, and the thermostat needed to be replaced. The vehicle was repaired, but the failure still recurred. The manufacturer was not made aware of the failure. The failure mileage was unknown.

See all problems of the 2006 GMC Canyon 🔎.

There is a high pitched whining coming from the engine whenever I use the air conditioning. The whine is not constant. It sounds like it makes the noise when the air conditioning compressor kicks in. I bought this vehicle on 4/29/2004.

See all problems of the 2004 GMC Canyon 🔎.