Q: i have a 2005 gmc c5500 the heater motor comes on for 20 sec when first start truck then nothing
i have a 2005 c5500 heater motor comes on for 20 sec when i first start truck then nothing
My car has an automatic transmission.
Recommended Services
| Heater is not working Inspection | $94.99 - $114.99 | Get a Quote |
Hello - I suspect this may be a problem with the fan motor resistor pack. If the fan control is put in the "Max" or "High" speed position, does the fan continue to run? Does the fan only run for 20 seconds, then stop in the Low and/or Med fan speed positions? If the answer is "Yes" to these 2 questions, the heater fan resistor pack is bad, and needs to be replaced. I would recommend having a Heater Is Not Working Inspection completed by a mobile, professional mechanic, such as one from YourMechanic, to diagnose this problem, get an accurate assessment of the damage and provide an estimate for repairs.
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
Get an instant quote for your car
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
What others are asking
Car shakes and makes noise when driving.
Without being able to hear the exact trunk and engine noises it will be difficult to give you an exact diagnosis. In the trunk, make sure there are no free objects floating around the trunk compartment, common items are the...
what do codes P1391 and P0340 mean?
The codes mean you need a camshaft position sensor (or something related to it such as wiring). Typically you replace the camshaft and crankshaft position sensor as a pair. The jerking/misfire sounds like you need a tune-up (https://www.yourmechanic.com/services/tune-up) at 112k...
White smoke from exhaust while idling when pedal is pressed. Vehicle is a 2008 BMW 750i
The white smoke is usually a sign that you may have a blown head gasket which is also accompanied by the car overheating. The engine is also most likely burning the oil which is why it is consuming it but...
Transmission fluid is leaking. Cracked on the bottom of the transmission.
Hi there. Depending on where the crack is located on the bottom of the transmission will depend on whether or not you will be able to fix without replacing the transmission. For example, if the crack is in the fluid...
Interlock is installed but the car won't start and the ECM is fried. Can the interlock damage the ECM?
Hello. Though the shift interlocking system does have an input from the ECM, I have never seen one fail and cause this. Most of the time, this is caused by a bad brake pedal switch or a shift lock solenoid....
When I went to change the timing belt there were 25 teeth were missing but it didn't jump time - how is this possible?
Not all the teeth need to be present in order for the pulleys to turn. However, the only way to tell if the cam and crankshaft were really in the right position relative to one another is to line them...
Replace Radiator - do I need to purge/recharge the AC system?
Hello. When replacing the radiator, you do have to mess with the condenser a little bit, but you do not need to disconnect it or remove it. The first step when it comes to the condenser is to remove the...
When replacing the ecu, do I have to have it programmed upon installation?
The PCM will need to be programmed if you have theft system that is factory installed. The PCM will need to be programmed to communicate with the theft module.
My aura shakes when it starts saying "service traction" what is it?
Hello, thank you for writing in. At this point there are a lot of possible causes for your vehicle's symptoms. To gather more information, we need to start with having the vehicle scanned for diagnostic troubleshooting codes. This can be...
Related articles
A Buyer’s Guide to the 2012 GMC Canyon
In In today’s world where it seems as if carmakers are determined to deliver only the largest vehicles possible, the 2012 GMC Canyon offers a compact pickup that holds its own. From a 4-cylinder that offers more horsepower than other...
A Buyer's Guide to the 2012 GMC Yukon Hybrid
The The GMC Yukon is about as big and powerful as any SUV can ever get. However, in the past, that also meant paying a large sum every time you hit the pump. GMC has addressed this problem with their...
How to Get Buick Dealership Certified
GM/Buick car dealerships offer automotive technician jobs to mechanics who are certified through the Universal Technical Institute (UTI) and GM.
Browse other content
Maintenance
Estimates