What tranny does a 87 Suburban with a 5.0L have?

I had a 99 Suburban that did almost the same thing, it turned out to be the Catyletic Converters were plugged. Try taking the exhaust pipe loose at the manifold for test purposes. If it runs good with the pipes loose, that's the problem. Replace the Cat's. There were no codes for either, it would start and run nice for about 5 seconds, then run rough and then stall.

probably not trans mission check fuel filter and or some of the emissions system for clogging or disconnected egr,pcv,map but fuel doesnt show codes

I presume the two leads you mention are:-
a) very heavy main +12V power lead from the battery terminal with approx 3/8" eyelug terminal,
b) less heavy wire that connects battery power to main vehicle fusebox for power distrubution- this cable may incorporate a fusible link.
The two leads (as above) connect onto the same heavy duty 3/8" terminal on the starter motor.
The lower 3/8" power post (closest to the motor housing) connects only to the starter motor and should not normally be tampered with.
There should be one more light duty wire that operates the starter motor engage solenoid .- This is connected back to the ignition switch 'Start' +12V control output.

May be the fuel pump.

You need to find the leak (probably in one of the cooler lines or the pan gasket) fix it, and make sure you have the correct fluid level. If you do all that and it still won't go you probably wore out the internal components from driving it with low fluid. Good luck.

It is a 4L60E , electronic trans. The same trans fits 93 through 99 old body style Tahoe, Suburban, and Pick up's. Good Luck

your getting waer or antifreeze into the tranny,you need too either put an aux cooler on it or replace the raidator!!!!
then change the tranny fluid again also drain the tourq converter!!!!
try this before you rebuild the tranny!!!!

youre right tranny rebuild

Your suburban should have a 4L60E transmission if it a 1/2 ton C1500. Mine is a 4 wheel drive, but it is the same transmission except for the tail shaft to accomodate the transfer case. The 3/4 ton trucks came with a 4L80E.

I just change the torque converter, and I forgot to mark the cooling lines that come from the radiator. upper hose is flexable and is on top of the radiotor tank. does it go to the upper fitting on the tranny . and the one is solid tranny is the lower fitting on the trany , thanks for the help,