How do I determine if I have the "towing package" on my 1990 Suburban 1500 4x4? Thanks to another posting here, I have figured out that I have the GT4 (3:73) gears. What else would I look for to figure this out. It looks like I have a transmission cooler... is that the little radiator looking thing in front of the radiator? That wouldn't be anything else would it? It looks like the 2 hoses that come out of it run to the top of where the oil filter gets screwed in. Thanks for your help. Ross. ---------- Post added at 04:43 PM ---------- Previous post was at 04:38 PM ---------- I forgot to ask ... did these trucks come with different transmissions depending on the package?