K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Figure No. 1
Some 1988, 89 or 1990 C1, C2 and C3 light trucks subjected to extreme frame flexing in severe duty may experience front frame crossmember cracking.
The crack may start at the bottom corner of the right lower control arm pocket and extend up the side (see figure 1.).
Trucks experiencing this condition should be repaired by drilling a stop hole at the end of the crack, welding the crack and welding a plate over the crack
using the following procedures:
Important
Use filler metals from a freshly opened container. GMAW - Gas Metal Arc Welding use: Electrode E70S-3 SMAW - Shielded Metal Arc Welding use:
Electrode E7018
NOTICE:
Disconnect battery (batteries) when arc welding on vehicle to avold electronic component damage.
Service Procedure:
1.
Disconnect battery (batteries).
2.
Remove right side lower control arm (refer to service manual section 3-C).
3.
Clean or grind crossmember surface to determine end of crack.
