AC mode motor timing - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rws1012 · 08-28-2022, 11:59 AM

Had to replace my mode motor on my 2001 Silverado 2500. The plate came out with the motor. The new part came with the new plate . Cant get the white gear and new plate gears to work. How do you set the timing on these gears? I have tried different settings but it still wont work with the switch on the dash panel.
You tube videos don't show that part because it is a real pain to get to this part.
Any help is appreciated. Been on this for a week and still can't get all the heat and air to blow out of the right places.

**hatzie** · 08-30-2022, 06:41 PM

Usually you remove the HVAC/ECAS fuse, install the motors, and re-install the fuse.
Don't touch the HVAC controls while they re-learn their positions. It'll take a few minutes.

if that doesn't work you can probably force a recalibration with a Tech2.

08-28-2022, 11:59 AM	#1
rws1012 Registered User Join Date: Apr 2016 Location: Sapulpa Ok. Posts: 71	AC mode motor timing Had to replace my mode motor on my 2001 Silverado 2500. The plate came out with the motor. The new part came with the new plate . Cant get the white gear and new plate gears to work. How do you set the timing on these gears? I have tried different settings but it still wont work with the switch on the dash panel. You tube videos don't show that part because it is a real pain to get to this part. Any help is appreciated. Been on this for a week and still can't get all the heat and air to blow out of the right places.

08-30-2022, 06:41 PM	#2
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,912	Re: AC mode motor timing Usually you remove the HVAC/ECAS fuse, install the motors, and re-install the fuse. Don't touch the HVAC controls while they re-learn their positions. It'll take a few minutes. if that doesn't work you can probably force a recalibration with a Tech2. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.



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