2004 Envoy HVAC blower prob

[Malipoopoo]

Blower does not work in Position 1. Anybody have experience with this? All other speeds work. Figure it's resistor or relay. TIA

[Malipoopoo]

Ok. So If I want to replace the relay. Where would I find it? Who would have the best price?

[brian 1]

found this bulletin for your problem and for anyone else that has this problem.found alot of these with this connector burnt,it causes the resistor to short out.Subject:EI05082 - Loss of Blower Motor Speeds Except for Low Speed or Inoperative (Replace Blower Motor Resistor and Resistor Module Connector) keyword fan #05-01-38-012C - (11/02/2006)

Models:2004-2006 Chevrolet Avalanche, Silverado, Suburban, Tahoe, TrailBlazer, TrailBlazer EXT
2007 Chevrolet Silverado (Classic) Built Prior to September 1, 2006
2004-2006 GMC Envoy, Envoy XL, Sierra, Yukon, Yukon Denali, Yukon XL
2007 GMC Sierra (Classic) Built Prior to September 1, 2006
with HVAC System AC Front, Manual Temp Control (RPO CJ3) or Heater Only (RPO C42)

This bulletin is being revised to clarify the Warranty Information. Please discard Corporate Bulletin Number 05-01-38-012B (Section 01 -- HVAC).
<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1870357&psdid=440&evc=sm#ss1-1870357">Condition

Some customers may comment that the blower will only work on low speeds or has become inoperative.
<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1870357&psdid=440&evc=sm#ss2-1870357">Correction

REPLACE THE BLOWER MOTOR RESISTOR AND RESISTOR MODULE CONNECTOR.
Replace the blower motor resistor and module connector using the following procedure:

1. <LI type=1>Remove the blower fuse.
   • Fullsize Trucks and Utility Vehicles -- Htr A/C & HVAC 1 fuses
   • Midsize Utility Vehicles -- Blower Fuse 35 located in the Underhood Fuse Block
   <LI type=1>Lower the hush panel or close-out panel enough to gain access to the resistor module connector. <LI type=1>Disconnect the connector from the resistor module. <LI type=1>Remove the tape from the wiring harness to expose the wiring.
   
   
   <LI type=1>Cut the wires back far enough from the connector to eliminate any melted insulation on the wire. Tip
   Use the old connector as a map for splicing the wires for the new connector. Be sure to use the correct crimping tool from the terminal repair kit J 38125. Use only Duraseal splice sleeves. Other splice sleeves may not protect the splice from moisture or provide a good electrical connection.
   <LI type=1>Install the new connector. Use the yellow splice sleeves provided with the connector. <LI type=1>Install new blower motor resistor. <LI type=1>Reinstall the fuse or connector block. Test the blower motor to make sure all speeds are functional.
2. Reinstall the hush panel/close-out panel.

<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1870357&psdid=440&evc=sm#ss3-1870357">Parts Information

Important: To determine which resistor to use for Fullsize Truck/Utility vehicles, search the parts catalog using the vehicle's VIN.
Part Number
Description
Qty
15862656
Connector - Resistor Blower Motor (includes splice sleeves)
1
89019088
Resistor -- Blower Motor (Fullsize Truck/Utility)
1
89019089
Resistor -- Blower Motor (Fullsize Truck/Utility)
1
89019100
Resistor -- HVAC & A/C (midsize utility vehicles)
1
hope this is what your looking for.

[Malipoopoo]

Thanks!!!

[malangon]

hi im tryng to replace the fan resistor on a 03 envoy i read the post brian1 says to locate the resistor by lifting the hush, please can you tell me whats the hush and where its located . thanks

[brian 1]

malangon the hush panel is located on the pass side of the vehicle under the dash,it just a panel that comes off to access the blower resistor.