A thread to post:
- service difficulties
..specific to the GMT800 truck platform used on the 1999-2006 full-size GMC and Chevrolet pickups, Suburban, Yukon XL, and Escalade ESV in both 1/2 ton and 3/4 ton chassis types.
Much of the chassis and power train are also shared with the shorter-wheelbase SUVs: Tahoe, Escalade, Yukon and also the Avalanche.
GMT800 - Wikipedia, the free encyclopedia
Chevrolet Suburban - Wikipedia, the free encyclopedia
Chevrolet Silverado - Wikipedia, the free encyclopedia
Six engine choices, V8 except as noted:
4.3 gasser v6 (half ton only) .. 195 hp, 260 lb ft
4.8 gasser (half ton only) .. 270 hp, 315 lb ft
5.3 gasser (half ton only) .. 285 hp, 325 lb ft
6.0 gasser .. 335 hp, 375 lb ft
8.1 gasser (3/4 ton only) .. 340 hp .. 450 lb ft
6.6 diesel (3/4 ton only) .. 300 hp .. 550 lb ft
Performance figures are typical and vary from year to year and among models.
The half ton and SUV models generally use the 4L60e automatic transmission. The 3/4 ton gassers use the 4L80e automatic transmission, and the diesels use the Allison 1000 automatic transmission.
Some of the 8.1s are built with a 4L85e transmission which is identical to the 4L80e except for the presence of a fifth planetary gear on the input shaft.
There are a few trucks out there with manual transmissions, usually the NV4500.
Relevant RPO codes
GT4 - 3.73 rear axle ratio
GT5 - 4.10 rear axle ratio
G80 - limited slip rear axle
MN8 - 4L85e transmission
MT1 - 4L80e transmission
4WD versions were equipped with the NP-246 auto-trac transfer case.
A complete list of RPOs is available here
I believe all models had independent front suspension using torsion bars.
Standard tires were LT265/70R16 for the half ton and LT245/75R16E for the 3/4 ton.