Centerlink (# 13 in the picture)
Fits Cadillac/Chevrolet/GMC:
Escalade 4WD 1999-2000,
K1500 Pickup 4WD 1988-1999,
K2500 Pickup 4WD 1988-1999 except 8600lbs GVW*,
Blazer/Jimmy Full Size 4WD 1992-1994,
Tahoe/Yukon 4WD 1995-1999 (Old Body) &
K1500 Suburban 4WD 1992-1999
4th digit of the V.I.N.: Gross Vehicle Weight
E= 6,001 - 7,000lb/Hyd
F= 7,001 - 8,000lb/Hyd
G= 8,001 - 9,000lb/Hyd (8600lbs)