Common issues to look for on the S10 I bought today? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 12-18-2011, 05:45 PM
mike 96 ws6's Avatar
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Common issues to look for on the S10 I bought today?

It's a 2003 S10 4x4 ZR2 4.3L automatic. VIN = 1GCCT19X93811xxxx.
140k miles. It runs and drives fine and is in excellent condition cosmetically. (pictures from my cell phone here). I climbed under it and see no fluid leaks other than a small amount of motor oil from the front main seal and a small amount of gear oil from the front axle shaft seals at the differential housing. I checked for mud/dirt accumulation on top of crossmembers, around exhaust manifold-to-exhaust connections ect, and see no evidence of any off road abuse. (there is no sign this trucks underside has been thoroughly cleaned recently either).
At one point last year the previous owner had an issue repaired involving the front axle drive engagement (hub repair is what she stated but was not sure about that). I'll try to get more info to post about this.
I tested the front drive today and the transfer case engages/disengages fine and both front tires (31x11.50 BFG all-terrain T/A's) pull good, even on asphault (including low range).
I'll get busy tommorrow changing all the fluids, filters ect and would appreciate any tips on issues to look for specific to this truck.

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Old 12-23-2011, 07:59 AM
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S10 issues to look for

Not a whole lot to look for on these, except for the oil cooler lines. They tend to start leaking around where the pressed on fittings are. They are good trucks and actually just rebuilt the motor in one (4.3). Make sure all the wiring is pushed away from heat sources, especially the grounds and wiring for the starter. Good luck with the truck!
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Old 12-24-2011, 01:27 AM
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Wash, rinse, drive, repeat, enjoy.

Great trucks. I have an 03 ZQ8 GMC sonoma. Its the lowered sport version like the S10 Extreme.

Since you have the 4x4 I doubt this is an issue, but some of the S-trucks had a two-piece rear driveshaft with a carrier bearing. The stock carrier bearing is pretty wimpy and tends to fail. If you start getting driveline noise or vibes, look there first.
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Old 01-02-2012, 07:16 PM
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Quote:
Originally Posted by Guntar13
Not a whole lot to look for on these, except for the oil cooler lines. They tend to start leaking around where the pressed on fittings are. They are good trucks and actually just rebuilt the motor in one (4.3). Make sure all the wiring is pushed away from heat sources, especially the grounds and wiring for the starter. Good luck with the truck!
Excellent advice. Yes, both lines from the filter housing to the radiator were leaking slightly where the fittings are pressed on. Also the bottom fitting at the radiator was leaking.
I got the new line assembly from my local GM dealer (part# 15194578 $96.05) and the seal for it (part# 11561843 $4.05)
I also bought 1 fitting for the radiator (part# 15719697 $13.03) since he only had 1 in stock. So I just replaced the o-rings in the other fitting to head-off any future problems there.
As far as wiring close to the exhaust manifolds I didn't see any issues.
Thanks Guntar13!!!
Mike
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Old 01-02-2012, 07:19 PM
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Quote:
Originally Posted by curtis73
Wash, rinse, drive, repeat, enjoy.

Great trucks. I have an 03 ZQ8 GMC sonoma. Its the lowered sport version like the S10 Extreme.

Since you have the 4x4 I doubt this is an issue, but some of the S-trucks had a two-piece rear driveshaft with a carrier bearing. The stock carrier bearing is pretty wimpy and tends to fail. If you start getting driveline noise or vibes, look there first.
There is no carrier bearing on the 4 wheel drive but I have seen plenty of issues on 2 wheel drive trucks with carrier bearings in the past.
Thanks curtis73
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