04 Chevy 1500 A/C issue - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sdkid · 07-01-2020, 11:53 AM

Has the electronic panel with dual zone control. Driver side goes full heat sometimes. Can someone tell me the location of the actuator for the driver side?

**hatzie** · 07-02-2020, 02:55 PM

Driver side is on top of the heater box.
You have to pull the dash cover and the duct that passes over the top of the heater box.

The passenger side is a lot easier. Just pull the beauty cover and the actuator motor is right on the bottom of the heater box.

Have you tried resetting the HVAC controller?

**Bob B.** · 07-02-2020, 03:48 PM

Hold it, I think the left (driver's side) temp actuator is the one on the bottom of the HVAC case. BTW, sometimes you can get the top temp. actuator off by removing the radio and reaching in. By all means try the reset first, that often fixes the problem.

sdkid · 07-06-2020, 04:32 PM

How do I do the reset?

**hatzie** · 07-06-2020, 06:59 PM

03-07 AUTOMATIC HVAC with the digital display.

Start the truck and set the HVAC controls to AUTO.
Shut off the truck
Pull the HVAC/ECAS fuse in the underhood fuse relay block.
Leave the fuse out for 2 full minutes.
Re-install the fuse.
Start the truck and wait til the HVAC finishes calibrating all the motors. It'll take a couple minutes.
Switch the truck off for full 15-20 seconds.
Restart the truck and check that it works now.

Manual system reset.

sdkid · 07-08-2020, 10:59 PM

Thank you Hatzie!!!

**hatzie** · 07-09-2020, 04:34 PM

Did it work for you?

sdkid · 07-11-2020, 11:08 AM

Seemed ok until this morning. I've had it full cold. This morning I turned it to 70ish, then it went full hot on the driver side.

**hatzie** · 07-11-2020, 03:22 PM

Just looked at the service books. I was incorrect. The RH blend motor is on top of the airbox.
The LH motor is on the bottom of the HVAC box under the beauty cover and it's darn easy to R&R.
I've read conflicting information. I trust GM.

Pull the heater fuse referenced above before you remove the motor and don't plug it back in til the new one is installed and you're ready to calibrate it.

Re-cal the system after you finish installing the motor.

sdkid · 07-15-2020, 06:32 PM

Thank you sir. I will update you.

07-01-2020, 11:53 AM	#1
sdkid Registered User Join Date: Sep 2004 Location: Pierre SD Posts: 1,533	04 Chevy 1500 A/C issue Has the electronic panel with dual zone control. Driver side goes full heat sometimes. Can someone tell me the location of the actuator for the driver side? __________________ I think the world needs a drink... Help somebody...If you can....VanZant We're not wrong, we're not sorry, and its probably gonna happen again. That's the truth about men. Tracy Byrd Member# 13924 '70 c10, 350/350 '68 c10 250/4spd '68 c10 no eng/trans fac ps/pb/ac/at (future father/sons project) '48 Chevy Loadmaster

07-02-2020, 02:55 PM	#2
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: 04 Chevy 1500 A/C issue Driver side is on top of the heater box. You have to pull the dash cover and the duct that passes over the top of the heater box. The passenger side is a lot easier. Just pull the beauty cover and the actuator motor is right on the bottom of the heater box. Have you tried resetting the HVAC controller? __________________ 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.

07-02-2020, 03:48 PM	#3
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,369	Re: 04 Chevy 1500 A/C issue Hold it, I think the left (driver's side) temp actuator is the one on the bottom of the HVAC case. BTW, sometimes you can get the top temp. actuator off by removing the radio and reaching in. By all means try the reset first, that often fixes the problem. __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.

07-06-2020, 04:32 PM	#4
sdkid Registered User Join Date: Sep 2004 Location: Pierre SD Posts: 1,533	Re: 04 Chevy 1500 A/C issue How do I do the reset? __________________ I think the world needs a drink... Help somebody...If you can....VanZant We're not wrong, we're not sorry, and its probably gonna happen again. That's the truth about men. Tracy Byrd Member# 13924 '70 c10, 350/350 '68 c10 250/4spd '68 c10 no eng/trans fac ps/pb/ac/at (future father/sons project) '48 Chevy Loadmaster

07-08-2020, 10:59 PM	#6
sdkid Registered User Join Date: Sep 2004 Location: Pierre SD Posts: 1,533	Re: 04 Chevy 1500 A/C issue Thank you Hatzie!!! __________________ I think the world needs a drink... Help somebody...If you can....VanZant We're not wrong, we're not sorry, and its probably gonna happen again. That's the truth about men. Tracy Byrd Member# 13924 '70 c10, 350/350 '68 c10 250/4spd '68 c10 no eng/trans fac ps/pb/ac/at (future father/sons project) '48 Chevy Loadmaster

07-09-2020, 04:34 PM	#7
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: 04 Chevy 1500 A/C issue Did it work for you? __________________ 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.

07-11-2020, 11:08 AM	#8
sdkid Registered User Join Date: Sep 2004 Location: Pierre SD Posts: 1,533	Re: 04 Chevy 1500 A/C issue Seemed ok until this morning. I've had it full cold. This morning I turned it to 70ish, then it went full hot on the driver side. __________________ I think the world needs a drink... Help somebody...If you can....VanZant We're not wrong, we're not sorry, and its probably gonna happen again. That's the truth about men. Tracy Byrd Member# 13924 '70 c10, 350/350 '68 c10 250/4spd '68 c10 no eng/trans fac ps/pb/ac/at (future father/sons project) '48 Chevy Loadmaster

07-11-2020, 03:22 PM	#9
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: 04 Chevy 1500 A/C issue Just looked at the service books. I was incorrect. The RH blend motor is on top of the airbox. The LH motor is on the bottom of the HVAC box under the beauty cover and it's darn easy to R&R. I've read conflicting information. I trust GM. Pull the heater fuse referenced above before you remove the motor and don't plug it back in til the new one is installed and you're ready to calibrate it. Re-cal the system after you finish installing the motor. __________________ 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.

07-15-2020, 06:32 PM	#10
sdkid Registered User Join Date: Sep 2004 Location: Pierre SD Posts: 1,533	Re: 04 Chevy 1500 A/C issue Thank you sir. I will update you. __________________ I think the world needs a drink... Help somebody...If you can....VanZant We're not wrong, we're not sorry, and its probably gonna happen again. That's the truth about men. Tracy Byrd Member# 13924 '70 c10, 350/350 '68 c10 250/4spd '68 c10 no eng/trans fac ps/pb/ac/at (future father/sons project) '48 Chevy Loadmaster



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.