Sorry Heartbeat no offense intended to your user name or the other TGP owners. 

I've attached a copy of the dorman catalog pages for reference.  Might help another owner.

I ordered the GM part #10145142 Dorman 626-100.  We shall see what shows up and if it is correct.  The brackets are in different positions between the two. 

I will compare the two and order the closest one.  Even though it's a beater, I don't mess around when it comes to vital fluids. Lol

They also have a 626-100 which is for 91-93... Why is 1990 so different?

Ok, My car loves the attention and is breaking faster then I can fix it.   I bought this car to save gas and miles on my 3/4 ton Chevy.    Now that I fixed the fuel hose problem ($45)  I just found my HVAC heater pipe assembly leaking from the bottom of the car near the crank pulley. Who thought putting a steel heater pipe was a good idea?

Anywho, I found Dorman has one (626-101) but their website and all of the part stores say it only fits 1989's.  It looks like it would work on my 1990 just fine.  I cant be the only one with this problem.  What do you folks think, is there a major difference between the two production years that this will not work?

If there is a major difference, what is a viable part number that I can source to get this beater with a hair dryer on the road again?

Thanks Heartbeat...Positive it was the hose.  The hose was separated at the crimped fitting.  I found a shop that can rebuild it here...Hopefully be able to get it back tonight.

Does anyone know of where to find these hoses?  Part number or place to get these would be great.  I cant drive my car until I get these replaced/fixed.

Payment sent and thanks!

I realize this is an old thread, but I think it would be beneficial for other new owners looking to rebuild their own turbo's to know what our stock turbo's have...dynamic or carbon seal?  I'm assuming 1990's had the dynamic.  This would be beneficial when looking for a rebuild kit.  Still a great write up.

If you still have the crossover and stock down pipe, and they dont leak...I'll buy em.  PM sent here and W-body forums.