Ryan Byrd

I have a 2007 1500 Suburban LT 4X4, the front blower motor suddenly stopped blowing but the rear still works. I have tried manually adjusting the speeds low to high, defrost to feet, recirculate and nothing will make the air blow up front. Nothing prior to it quitting indicated their was problem. Is it the blower motor, resistor, a relay or what?

Chevrolet Customer Service

<!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <wontGrowAutofit/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} </style> <![endif]--> Ryan Byrd,

I have researched my resources and there are currently no known issues based on your description for 2007 Suburban vehicles. I recommend consulting with a certified technician for additional assistance. They should be able to offer an official diagnosis after inspecting the vehicle.

Please keep us posted.

If you have additional questions, please feel free to contact me privately.

Louis
GM Customer Service

gvette

I had a similar issue with my 2007 tahoe, front stopped blowing yet rear worked fine, replaced the blower relay, didnt work, in the long run ended up being the blower motor... Been working fine now for a while... Good luck!!

Pappyvtx

My wifes 07 Suburban just developed this issue, Front blower motor blew fuse. Started to put in new fuse ( with the keys OUT OF THE IGNITION ), and the fuse blew before I could even lock it in place. Anyone have any ideas on this one?? Help please!!

in2pro

Try unplugging the blower motor resistor and motor, then put the fuse in and see if it blows... if it does not, then plug each item in one at a time with the fuse removed and then try the fuse again...

My guess is its the blower motor resistor
But do your due diligence of troubleshooting first...

Pappyvtx

IN2PRO , Thanks so much for the reply. I have just removed the fan motor , the resistor, and the speed control module from the dash. After removing each component one at a time and testing with plugging in a fuse each time, I still am blowing fuses with everything disconnected. I have a schematic from a Chiltons manual and it is not really showing me anything else that I might remove. What really bites is that the fuse is HOT at all times (schematic even shows this). The schematic unfortunately does not show me the direction of the cold side of the fuse. Got any other ideas that I can run with?

(2007 Suburban 1500 LTZ 4x4, w/dual climate control in front, and separate rear cooling/heating controls. Rear works fine.)

in2pro

Okay, couple more questions:
1. Do you have the manual or Auto HVAC system
2. Can you confirm which fuse it is that is blowing.
3. Have you checked other fuses to make sure its not a systemic issue.

I'll check my schematics and see what I can post

a55bruce

Looks like the cold side of the fuse (HVAC BLWR) feeds a junction block on the right side of the instrument panel. I'd check the connectors to the fuse panel. Look for burnt / corroded connections.

in2pro

Here is the schematic from the service manual...

Pappyvtx

Thanks again for all the help! I did finally find the issue! Started tracing BACKWARDS from the fuse block under the hood. Didn't get too far till I found a pinched wire under one of the screws that holds the fuse block down. It was the screw on the firewall side of the block! It must have either been pinched by the previous owner , or (unbelieveably) by the factory, and finally just broke thru the wire insulation. I repaired the wire and put in a new fuse, and WA-LA! No more blown fuses!! Again, I really appreciate all the help! This truly is a great forum for those of us that work on our own vehicles!


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