The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - K-2500 six hole

1976gmc20 · 05-23-2019, 04:15 PM

Thanks, everyone! I learned a lot.

So this red/silver pickup could have a TH400/3L80, which means it would be a 12 mpg pickup. Or else it could have a 700R4. The latter is what I have in my 1991 Suburban which has yet to be a problem even though we've towed a trailer with it some, and I expect that's mostly what it did before we got it. It might have been rebuilt by a previous owner.

And it seems the only difference between the 1500 and 2500 6-hole is the rear axle and springs? That makes it more like a "heavy-half" than a 3/4 ton.

05-23-2019, 04:15 PM	#6
1976gmc20 Registered User Join Date: May 2015 Location: Montana Posts: 3,696	Re: K-2500 six hole Thanks, everyone! I learned a lot. So this red/silver pickup could have a TH400/3L80, which means it would be a 12 mpg pickup. Or else it could have a 700R4. The latter is what I have in my 1991 Suburban which has yet to be a problem even though we've towed a trailer with it some, and I expect that's mostly what it did before we got it. It might have been rebuilt by a previous owner. And it seems the only difference between the 1500 and 2500 6-hole is the rear axle and springs? That makes it more like a "heavy-half" than a 3/4 ton. __________________ Current/past Chevy/GMC trucks: 1958 Chevy C-60; 1965 GMC C-50; 1965 Chevy C-10; 1971 Chevy K-10; 1973 Chevy K-20; 1976 GMC C-20; 1977 Chevy C-10 Suburban; 1980 Chevy K-10; 1989 Chevy K1500; 1991 GMC V1500 Suburban; 2016 Chevy K2500 HD Other vehicles: 1988 Jeep XJ; 2011 Toyota 4Runner