I changed the oil in my sc for what I'm assuming to be the first time in 148k miles. I noticed 3 days later its making a weird rattling sound. Could I have damaged something. I used 2 bottles of gmt sc oil. Filled it to just below the threads and used a turkey baster with a straw on the end to suck out the old stuff

What the bell happened lol

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2000 Silvermist GTP. CAI, 180 t-stat, stage 2 shift kit, u-bend and resonator delete, fastkatt tuned PCM, autolite P104's, 3.4 pulley, altenator wire upgrade.

Sounds like the coupler is shot. Someone may chime in and correct me or agree..

http://www.zzperformance.com/grand_prix ... &catid=106

They also have an OE replacement that's like 14.99 if you'd rather do that.

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I've heard the coupler sounds like marbles in a can. But I was curious if this is just coincidence or if me changing the oil possibly did something.

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2000 Silvermist GTP. CAI, 180 t-stat, stage 2 shift kit, u-bend and resonator delete, fastkatt tuned PCM, autolite P104's, 3.4 pulley, altenator wire upgrade.

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MODS:3.4" ZZP MPS pulley, ZZP PCM, 104 autolite plugs (.054), SS AUTO Headers, 9 in. FWI, home port sc, MORE TBD...
BEST 1/4: 13.80 BEST 1/4 TRAP SPEED: 100.6MPH!!

Pretty simple to do..

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Yeah, no way no how is changing the fluid going to effect it like that

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1998 GTP (L32 swap) | 2000 SE (L67 swapped)

Why buy something sensible with a RWD setup when you can build something really stupid, like this

a bad coupler sound like rocks in a can at idle, and the sound goes away when you put the engine under load. its a pretty simple fix.

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Mine: Black 06 GP GT, TOGS, Overkilled PCM, 1.9 rockers, Wizair CAI, Thrasher MPS, GMPP STB's & T/A's, F-Bodies...so far thats it...

Hers: Red 2011 Cruze LTZ turrrrrrrbo, stock and mad slow.

When you replaced the SC oil, the coupler gremlin became jealous, and decided you needed the extra practice changing the oil anyway..

I don't like your answer lol

I've replaced everything from a pcv valve to pistons on a 3800 but the coupler is one thing I've never done but always been curious to do it...what does this thing do?

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2000 Silvermist GTP. CAI, 180 t-stat, stage 2 shift kit, u-bend and resonator delete, fastkatt tuned PCM, autolite P104's, 3.4 pulley, altenator wire upgrade.

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MODS:3.4" ZZP MPS pulley, ZZP PCM, 104 autolite plugs (.054), SS AUTO Headers, 9 in. FWI, home port sc, MORE TBD...
BEST 1/4: 13.80 BEST 1/4 TRAP SPEED: 100.6MPH!!

when i changed mine, i only took out 9 of the 10 bolts and couldnt figure out why the snout wouldn't move, finally found the 10th bolt, UNDER the snout, going down into the block. pulled that one and it came off no probs.

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Mine: Black 06 GP GT, TOGS, Overkilled PCM, 1.9 rockers, Wizair CAI, Thrasher MPS, GMPP STB's & T/A's, F-Bodies...so far thats it...

Hers: Red 2011 Cruze LTZ turrrrrrrbo, stock and mad slow.

The coupler provided the connection from the snout shaft to the drive gear in the blower. When you see it, you'll understand. I have a new ZZP piece around here somewhere.

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One Big Ass Mistake America

Dont feel bad after 176,000 miles I replaced the S/C oil on my GTP that I picked up a few months ago. A few days later and that blower was howling like no tomorrow. I'm pretty sure the bearings are shot, but what are you going to do. I've got another blower sitting in the garage that needs to go one when I do my LIM gasket replacement.

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1997 TGP

is there a mileage that the coupler should be replaced just for good measures?

hate to revive a dead topic but if the coupler does go bad, would the noise stay all the time or just when warming up.

Anytime the engine is running

Milestone

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