Have you checked around on the S-10 Forums for the FSM? They may be able to help you. I used to be member on S-10forum and s_series.org
You have some different things going on with your truck than 99_XC600's 94 truck. He had the first year of the new models and they did have some bugs. Now saying that, there are some inherent issues with the S10's that never got fixed. They do like Balljoints, I changed them on both my 95 & 97 blazers, GM had some issues with front end durability and never fixed, the fullsizes have the same issues too.
You have a completely different fuel injection system than the 94, but do expect fuel pump issues, that's one of those inherent problems. Teach the girl to keep a minimum of a 1/4 tank of fuel and that pump will last mucho longer.
My 97 blazer was sold with 142K on it, my nephew had it until he sold it with 172K with stock motor/tranny. It ended up blowing an intake gasket, but I thikn it was from the Dexcol that was in it for 100K before I flushed it.
They did also have issues with leaking oil cooler lines, if they start leaking get them replaced.
I lost the motor @ 110K in my 95 cause I pushed it and the line ended up blowing off while I was driving, That was my stupid fault for putting it off.
First off, do about 4 flushes on the coolant system and get that nasty orange Dexcool outta there, that stuff was wreaking havoc on intake gaskets. I flushed out 97, 4-5 times and those little brown clumps would still show up, put the standard green back in it.
If you keep the oil/tranny fluids changed regularly and keep up the regularly maintenance, this will last for many, many miles/years. I've had both S10's and a Libby and for overall fit and finish/power/ and longevitiy, I would buy another S10 in a heartbeat. I can only hope our Libby makes it as long as our S10's did. The 4.3L are almost bullet proof with proper maintenance.
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'99 Tahoe, 3" BL, 285/75/16's , MT II's.
'05 Liberty Sport, -wifey's
'98 Poncho Fireturd, 3.8L, .....the purple pig!

