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Originally Posted by BACKNBLACK
Keep in mind the 2001 has the following issues.
1- Power Door Lockouts (Fixed in 2003)
2- Exterior Marker lamps are stil recessed into the body (Fixed in 2002)
3- Wheels were 16.5 anf 17" 2 Piece Star Rims. (Later 2002's had the 2 PC Forged Beadlock Runflats Rims)
4- The Lockers are the Same 2001-2002 Detroit Mechanical Locker (2003 Eaton Electronic Loacker Takes Over :-))
5- 2001 have the 8 cyl block crack issue check the vin number to verify if it was part of the build issues 137ZA is bad :-)
6- Make sure the Geared hub seals have been changed if over 20K and the brakes are fresh (Expensive job)
7- Make sure you do not have any HVAC issues with the 2001-2002 they still had issues until 2003 (Updated GM Components in 2003)
8- Lastly where I got burned on my H1 was the pwer steering box. It leaks (by design I think :-0) but only needed a clamp replacment. make sure if it leaks you check the clamp.
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If its a high mileage Z block you're likely to be ok. The #8 failure rate is about 25% I heard from an off the record source, most in the first 30,000 miles.
The rest is non issues [Recessed lights? That's an Issue? Really?].
If you want a truck with lockers, get a pre 99 truck that has the engine already replaced and installed whatever locker combination you want. The ABS/TT4 system is garbage.
If you want to get a nicer rig out of the box, get an used 04, those are the best rigs unless you want a to drop 100-115K for a used Alpha.
Most of the enhancements on the H1 in regards to HVAC and drive train tweaks was rolled in halfway through the 1997 production run. So anything 1997.5 or higher with a service history and a replaced engine would be ideal.