- 1998–2000 Factory-verified
M50, MG5 and MW3 print the same wording
Also described as Transmission, manual, 5 speed, New Venture GearTransmission, manual, 5 speed, New Venture Gear, 109 mm, 5.61 first gear, overdrive
Also documented for Chevrolet
Documented applications
- 1999–2007 Factory-verified
2005–2007: heavy-duty models only (GM’s HD list)
- 2001–2007 Factory-verified
- 2007–2008 Disputed
printed in the 2007–2008 lists only disputed: the 2007 and 2008 new-body Sierra lists print it in the heavy-duty half, but that half repeats the 2007 Sierra Classic heavy-duty list (same codes, same order) and no other source names the GMT900 HD gearboxes, so it may be a Classic carryover; both readings kept
- 1998–1999 Factory-verified
same wording as M50 and MG5; Wikipedia gives NV3500 and NV4500 5 speed manuals without codes
This page aggregates every documented appearance of MW3 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.