4l80E questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

krue · 01-21-2018, 09:23 AM

I have an '03 GMC van with 6.0l and 4l80E for swap purposes. The van was a Dept. of Corrections van and they had been using it for parts. It has no gage panel so I can't tell what gear the tranny is indicating. That matters because the tranny is in limp mode (only 2nd and R) and I am trying to figure out why before I pull it. There is tranny fluid in the round connector and some sources say that could be the problem and others say not. The plug does have power to it with the key on. What should I be looking for? Replace the harness? If so where is the best source for replacement.

01-21-2018, 09:23 AM	#1
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,448	4l80E questions I have an '03 GMC van with 6.0l and 4l80E for swap purposes. The van was a Dept. of Corrections van and they had been using it for parts. It has no gage panel so I can't tell what gear the tranny is indicating. That matters because the tranny is in limp mode (only 2nd and R) and I am trying to figure out why before I pull it. There is tranny fluid in the round connector and some sources say that could be the problem and others say not. The plug does have power to it with the key on. What should I be looking for? Replace the harness? If so where is the best source for replacement. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"



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