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How do i read my rpo codes?

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Old 05-03-2018, 05:32 PM
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Car: 1988 iroc-z
Engine: 5.0
Transmission: 5 speed
How do i read my rpo codes?
Hi all.. im at a loss trying to decode my rpo. Ive read some archives but my eyes glaze over. Can anyone tell me what gear ratio is in my 1988 iroc with 9 bolt rear? Thanks in advance.
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Old 05-03-2018, 05:40 PM
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Re: How do i read my rpo codes?
Rpo GM3 3:45 gears
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Old 05-03-2018, 05:41 PM
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Re: How do i read my rpo codes?
Hardtop 305 tpi 5 speed manual car
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Old 05-03-2018, 05:47 PM
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Re: How do i read my rpo codes?
Thank you very much. Some day ill figure out all the codes. Posi traction ? Seems like it anyways
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Old 05-03-2018, 07:06 PM
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Car: 1987 IROC-Z
Engine: L98 5.7L
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Axle/Gears: G80 GW6 3.27:1
Re: How do i read my rpo codes?
Originally Posted by gordfc
Thank you very much. Some day ill figure out all the codes. Posi traction ? Seems like it anyways
Do you have microsoft Excel on your computer? If so, pm me your email addy and I will email you a spread sheet you can type your codes into.
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Old 05-03-2018, 08:07 PM
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Re: How do i read my rpo codes?
Yes posi performance axle G80
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Old 05-04-2018, 07:50 AM
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Car: 1987 IROC Original Owner
Engine: LB9
Transmission: M39 MM5
Axle/Gears: G80 G92 J65
Re: How do i read my rpo codes?
Here you go...only reason I was able to pull it is it's a Z49 Export model.
Attached Files
File Type: pdf
Report for 1G1FP21F9JL161007.pdf (171.1 KB, 71 views)
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Old 05-04-2018, 08:15 AM
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Re: How do i read my rpo codes?
Wow. ... just wow. THANK YOU SO VERY MUCH. Thats perfect. Really appreciate it.
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Old 05-04-2018, 12:24 PM
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Re: How do i read my rpo codes?
You're welcome.
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