Sometimes my heater blower motor works and sometimes not. If I kick the blower sometimes it comes on. When the truck is at idle it will sometimes slow down and quit. I have check the connecting plug with not positive results. Is it the blower or the resistor?
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Re: 98 gmc pu blower doesnt always work.
Ive ran across this many times its usually the blower motor but I found that if I replace the blower and the replacement plug(thru GM)that the vehicles never had a blower issue again,so order up a motor and plug and be sure to solder the new plug dont use crimp fittings.have a good day DB
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heater or 'blower motor's are prone to bearing failure,which can cause interference between fan & heater box;stopping,or slowing fan.consult a shop manual to DIY,or have a mechanic check blower motor .[I have found a stockpile of acorns causing a problem a time or two!!] Hmmm,Summer OK;Winter.........O nuts.......good luck!
I am kinda having the same problem not as bad as yours. They replaced my relay or what ever it is 2 times. When it got down to 9 degrees mine quit working again for 2 days. It started working again but took it back to dealer anyway. They had a new part they put in then they called us and told us the blower motor is burnt up and it is gonna cost us $300. We asked how it can be burnt up when it was working when we brought it in. They said I don't know but said it is. After talking to 3 people and no solution to this, we told them to put the old relay in cause we're not paying 300 for something that was working. So far still working but sure it will quit again. Will never buy another GMC produce.
First I recommend checking that your coolant level is good. Please check this cold so you don't risk getting burned. I have seen too many heater complaints where the coolant level was simply too low to fill the heater core. Next, you should check if the heater control valve is operating. I don't have any GM experience, but heater valves are often the cause of intermittent heater operation in many cars. Good luck!
try taping on the blower motor with a mallet. if it starts when u tap it, its probably the blower motor itself. if it doesnt it is most likely the blower motor resistor. let me know which one you need to find
Ok, first off, check the fuses under the dash. If they're all good, does the blower work only on high speed? If yes, then you have a bad blower motor resistor, which is located under the hood, near the blower motor itself. If the motor doesnt work at all at any fan speed, make sure the wiring harness that plugs into the motor under the hood is clean and tightly installed. If it still doesnt operate, sometimes tapping on the blower motor housing will kick it on, but if that doesnt work, you may have to replace the blower motor. They are available aftermarket, and arent usually too expensive.