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Old 05-08-2018, 04:52 PM   #1
pound41
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2003 2500 HD what trans fluid

Hello:
I have a 2003 GMC 2500HD 8.1 Allison Transmission
Getting ready to change fluid. Things are always changing. So what is the trans fluid they now recommend
Thanks
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Old 05-08-2018, 05:12 PM   #2
truckdude239
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Re: 2003 2500 HD what trans fluid

dexron VI 7.5 qts with drain and fill
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