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Old 11-28-2007, 08:41 PM   #1
westbrookw
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03 SS problems

I finally got the truck from the wife today and now I have no clue as to what is wrong. When I am driving at about 30-40 MPH I get a grawling sound coming out of the left front. Not sure if it is the front drivers side wheel bearing and hub or the transfer case right under the seat. If I accellerate through 40 I never hear it. Only when I am moving at about 30-40.

Starting to notice a little pause in the engine when you are steping on the brakes also. Kind of like the vaccuum to the power brake is having a problem. Any info would be helful.

Waylon
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Old 11-28-2007, 08:46 PM   #2
68GMCCustom
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Re: 03 SS problems

The AWD transfer case on that truck is one of the best out there. My guess is it would have something to do with the front axle or something like a wheel bearing?

As for the stumble. Does the truck have a low idle? The gen III motors are pretty bad about dirtying up the throttle body about every 25k mi. Might try cleaning it.
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'68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy
'72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close
'06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD
'16 Kia Sorento - wife's econo-driver

my '68's powertrain and chassis build -links broken
A surprise phase - carb to efi -links broken
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Old 11-28-2007, 08:49 PM   #3
westbrookw
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Re: 03 SS problems

It idles around 500 rpm. How do you clean the thottle body?
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Old 11-29-2007, 01:44 AM   #4
68GMCCustom
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Re: 03 SS problems

remove the plastic intake, and spray the throat and inside the throttle body (open the blade with your hand) using "throttle body cleaner". I use a lint free cloth to get the backside of the throttle body and edges of the blade. while your at it..."spray" your MAF clean with "Mass Air Flow Sensor Cleaner"... do not touch the little wires.
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Kurt -

'68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy
'72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close
'06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD
'16 Kia Sorento - wife's econo-driver

my '68's powertrain and chassis build -links broken
A surprise phase - carb to efi -links broken

Last edited by 68GMCCustom; 11-29-2007 at 01:45 AM.
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Old 11-29-2007, 06:00 AM   #5
WLPTMP
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Re: 03 SS problems

we do a lot of hubs on that stle truck but we also done 2-3 transfer cases on the awd when it makes the noise turn your steering wheel from side to side to see if the noise goes away if it does its a hub if not could the t-case or front end
let me know if i can help in any way
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