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bought this 2001 silverado with a 5.3 payed a guy to do swap out the cam and clutch fan to efans ,he tuned it with hp tuners but now the ac turn off when the truck is at a stop light but compressor turns on as soon as I press the gas and go. works fine when in park and sometimes it shifts to quick and once it reaches 50mph no throttle response like if its lacking power please help
 

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My 2003 burb does the same thing. It did it before the tune but its really noticeable after the tune and EFan swap. I'm sending it into the GM dealer next week to have the AC evac and recharged and bearings greased. Hoping that does it.I'll keep you posted. I changed out the temp sensors and Ambient temp sensors because they were cheap off amazon and nothing changed.
Thanks
Cam
 

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The tune settings are probably wrong then or the wiring is. I couldn't tell you exactly what but it is installed wrong.
 
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