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#4803457 - 07/02/18 07:22 PM Fixed the AC in the Suburban today..
krismoriah72 Offline

Registered: 02/16/09
Posts: 1577
Loc: wv
Its been hot lately and while driving my 03 suburban down the road the a/c is nice and cold..however at stoplights or bueno.

I checked everything i could but nothing was wrong. AC works great except while idling...

I had a suspicion it might be the fan clutch.. so i spun it by hand..seemed taut.

The SUV is 15 years old and by the looks of the fan clutch its i gambled $50 and installed one.

I spun each by hand side by side and the newer one was a bit tighter but not $50 tighter..

I installed it and started the engine-- ROAR said the fan. I hadnt heard that noise in the 2 years that I have owned it.

Problem solved.. going to take some getting used to the ROARing of the fan but good to know i needed one.

I had two options Heavy Duty or Severe Duty. From what i gather the Severe duty pulls harder more often robbing horsepower and gas mileage. If i made a living towing i would probably do the Severe Duty but the HD one does alot more than the worn out one has been doing.

#4803464 - 07/02/18 07:38 PM Re: Fixed the AC in the Suburban today.. [Re: krismoriah72]
spasm3 Offline

Registered: 05/30/10
Posts: 8777
Loc: North Carolina
I replaced the one on my avalanche. The a/c now works great at idle, and low speed. I heard that the other brands would over engage. So i went oem. Was over $100 for the delco oe one.

Edited by spasm3 (07/02/18 07:41 PM)
13 elantra 68k 5w30 QSUD
03 chevy avalanche76k synpwr 10w30
01 saturnsc1 185k synpwr rebuilt
17 mazda cx-5 3900 miles m1 0w20/0w40 mix

#4803466 - 07/02/18 07:40 PM Re: Fixed the AC in the Suburban today.. [Re: krismoriah72]
Chris142 Offline

Registered: 06/05/03
Posts: 16966
Loc: Deplorable in apple valley, ca
I am replacing Tahoe ,suburban and Chevy truck fan clutches a lot lately atleats 2-3 a week.
02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40

#4803617 - 07/02/18 10:35 PM Re: Fixed the AC in the Suburban today.. [Re: krismoriah72]
Nick1994 Offline

Registered: 02/19/13
Posts: 10297
Loc: Phoenix, AZ
Had the same thing happen with my grandparent's Trailblazer. A/C was absolutely terrible at awful, I was driving my grandparent's around in 115+ degree heat and it was unbearable. Had my mechanic replace the fan clutch... Incresible A/C, and as you said the roar on startup, had never heard that before.
2015 Hyundai Sonata 2.4L 81k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 229k Valvoline & Fram Ultra
1996 Jeep Cherokee 4.0L 146k Mobil 1 HM 10w40 & Fram Ultra

#4805717 - 07/05/18 11:14 AM Re: Fixed the AC in the Suburban today.. [Re: krismoriah72]
caravanmike Offline

Registered: 05/09/09
Posts: 1074
Loc: ohio
I just replaced the fan clutch on an 03 Sierra. Same problem, no A.C. At idle. Fan clutched fixed it! Thanks for reminding me!
Oils I use: Any 5w-30,5w-20 conventional