P1481 Code on 2003 Envoy - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > Air Induction

Air Induction Performance Air Intake/Air Induction Modifications

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  #1  
Old 05-08-2010, 09:01 PM
JJfisher JJfisher is offline
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2003 GMC Envoy SLT XL
Light Pewter Metallic 4.2L I6 2WD
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Exclamation P1481 Code on 2003 Envoy

I just pulled a code P1481 and my cooling fan sounds like a jet engine. The code said something about fan speed. It sounds like it is stuck on high. I was wondering if anyone has had this problem. Not sure if it could be a relay or if it is something else. Perhaps the fan clutch that i have heard so much about. My temp gauge has been normal, truck not overheating at all. Please help
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Old 05-08-2010, 09:19 PM
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the roadie the roadie is offline
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2004 GMC Envoy SLT "Roadiemobile"
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Most certainly the fan clutch, but just unplug the harness going to it to confirm it's not the relay. If it stays on high speed, it's bad. Pre-2005 were the ones prone to early failure.

Lots of threads about changing them.
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Old 05-08-2010, 09:24 PM
JJfisher JJfisher is offline
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Thanks for the help. Know were i can get a good deal on one. I priced one at O'rielys auto for 170.00 ish
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Old 05-08-2010, 11:18 PM
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the roadie the roadie is offline
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Dorman (a good aftermarket supplier) makes them and they've been seen for $110-120 on Amazon and Ebay. Rockauto has them for $132.
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Old 06-21-2010, 12:49 PM
hullman8 hullman8 is offline
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2002 Olds Bravada
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Quote:
Originally Posted by the roadie View Post
If it stays on high speed, it's bad. Pre-2005 were the ones prone to early failure.

Lots of threads about changing them.
Is the relay bad or the fan clutch? I just replaced my fan clutch and it still sounds like a jet engine. How would I test the relay?

Mike
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Old 06-21-2010, 03:06 PM
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the roadie the roadie is offline
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Relays hardly ever fail, but you have a point. Swap 45 and 46 - they're the only two identical ones in the front fuse block. The other one is for low beam headlights and the DRL function.

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Old 07-01-2010, 02:03 PM
atblack21 atblack21 is offline
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I am in the same boat. I just tried that and the relay is still good. I did replace my fan clutch. Twice. When I switch the relays, the AC is still screwed and the low beams work.
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cooling fan, cooling system, fan clutch, fan relay, p1481

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