$89 PCM fixed idle and fan clutch issues Chevy Trailblazer LTZ 

I replaced the temp sensor, thermostat,water pump after my 20 year old radiator split. I got the damn taping but I just went through the steps in video with my old pcu still in cranked it up cold start tapped till warm up then just stopped so I think it worked no probs sence

I bought my 2004 in 2008. The old owner did some stupid stuff with the computer. He tried to make the car faster and had it shifting high rpm at light throttle. I went to pull a part and bought another computer for $35. My tb would not start. I used HP Tuner to turn the vat off. It will start and run now. I also used HP to raise the top speed to 120 mph.

Module…the switches are modules now and supposedly they have to be programmed…however, I’ve replaced things that “needed programmed” and it worked just fine without any programming…I noticed on my 05 that I don’t have a chipped key…and almost all the options in my pcm are turned off…lol…which means if I fix these updating data etc I’ll probably get locked out of my trailblazer cuz it didn’t come with the chipped key …crap

Pcmofnc does pcm tuning also. Awesome company. PCM of NC. They sell a lot of stuff for our rigs. Electric fan works great. I paid 178.00 and they tuned one for a CIA no cats changed the shift points and the secondary air pump and deleted other things.

Cool.good Demo.

Not seeing it in other comments, idle on our two is 700 RPM. 250K miles on the 2004, 115K on the other 2004. Edit, switches do not need to be programmed.

17:50 it wont come back to them... there are waaaaay too many car dumb people out there that NEED to go top the dealer... its the first place they go and usually take the hit cuz they need their car done quick and have no inclination to fix it themselves. even a switch panel on the door that takes 20 min and socket/screwdriver to do... even that makes peoples head explode. changing this pcm is easier that changing the door switches... but people would rather attempt to teach a dog to drive than do either the switches or pcm... people only barely know when to change their oil(or what kind their car takes) and neglect all other fluids until their shits broken...thats why dealerships will never "get whats comin to them"

Auto service where all the money is made. I got a buddy that’s a mechanic. He does well. He’s not even one of the high up people if you wanna make some good money and you’re young go to school to work on expensive things like race, cars or BMW and vehicles. Or learn how to be an airplane mechanic they make even more money.

Thanks bro - do yourself a favor and buy a lithium ion 3/8” ratchet

Thanks for the video, what I did notice is that you didn't take the negative cable off the battery and that might be why you didn't have the security light on

Dude. Did you try to just factory reset the old PCM?

😊this was really helpful sir.. do you have details where to buy the PCM Sir?

Can I get the information on pcm where you got it from. I’m experimenting similar issues with my 2002. Mine starts acting up in hot weather.

Where did you order that pcm from? Ive been having a similar problem with my 2002 trailblazer and think this is the last thing i haven't tried yet.

Idk why the dealers refuse to do updates…they should have to by law considering how much it effects on the engine having outdated data on the pcm…I was gonna buy a used one simply because they program it to the vin and update everything before they send it out…

I went to the junkyard. Shipper than amazon

Amen bro 💯

I’m having the exact same issue…. Gonna give this a try.

Is hwy 71 in the Austin TX area?

Try a different dealership