The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

**pound41** · 05-08-2018, 04:52 PM

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

05-08-2018, 04:52 PM	#1
pound41 Registered User Join Date: Dec 2002 Location: Northern Virginia Posts: 1,267	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